Insert geometries for Coromant U and T-MAX U drills. Wiper. D c mm mm mm mm S H P M K N P K H N S H P M K P M K P M

Transcription

1 Insert geometries for oromant U and T-MX U drills rilling entral insert Peripheral insert eneral choice P M K N S ood chip control in most materials including: steel, stainless, cast iron, titanium, heat resistant alloys and aluminium Low to high cutting speeds entral and peripheral insert -53 P-53 omplementary choice T-53 P-53 P K T -53, optimized geometry for increased edge security Productivity choice -WM -WM Wiper -WM -WM P K M Wiper geometry for up to 50% higher feed or steel and cast iron with hardness above 200 and easy to machine stainless steels or stable conditions and open tolerance holes entral and peripheral insert eneral choice P M K N S ood chip control in most materials including: steel, stainless, cast iron, titanium, heat resistant alloys and aluminium Low to high cutting speeds entral and peripheral insert omplementary choice P M eometry -58, optimized as peripheral insertfor low carbon steel and stainless steel igh cutting speeds T-53 T-53 P K Optimized geometries with increased edge security T-53 T omplementary choice P M K eometry -51, optimized as peripheral for good chip control in steel, stainless, cast iron igh cutting speeds P M ood chip control in steel and stainless 61

2 rilling Inserts for oromant U drills R416.2, R416.21, R and T-Max U drills R416.9, L416.1 entral Peripheral LMX 03/04 LMX 03/04 WMX 05/06/08 LMX 02 LMX 02 R-WM P Wiper Insert code = Peripheral insert = entral insert = entral and peripheral insert ll-round geometry 02 LMX P T LMX T R-WM R-WM 04 LMX T R-WM R-WM 05 WMX R-WM R-WM R R R T WMX 06 T3 04 R-WM 06 T3 04 R-WM 06 T3 08 R T3 08 R T3 08 R T T3 08 T T WMX R R R T imensions, l i d 1 s r ε

3 utting data oromant U and T-Max U drills R/L416.1, R416.2, R416.21, R and R416.9 ISO M Material rill eed Speed eometry / rade No. dia IRST OI ighest productivity omplementary rilling P M /r Unalloyed steel Non hardened % Non hardened % Non hardened % Non hardened % igh carbon & carbon tool steel Low-alloy steel Non hardened ardened igh-alloy steel nnealed ardened steel Steel castings Unalloyed Insert positioning: = entral Wiper 290 ( ) 270 ( ) 230 ( ) 210 ( ) 210 ( ) 220 ( ) 170 ( ) 180 ( ) 130 ( ) 200 ( ) Low alloyed (alloying ( ) elements 5%) Stainless steel erritic, Martensitic ( ) 13 25% r ustenitic Ni > 8% % r 150 ( ) ustenitic erritic ( ) (duplex) = Peripheral v c m/min T T T T T T T T T T T -WM geometry for machining steel and cast iron with hardness < 200 in stable conditions, increase feed ( ) with 50%. or easy to machine stainless steels in stable conditions, increase feed ( ) with 25%. 63

4 rilling ISO M Material rill No. dia M S K N eed Stainless steel ustenitic castings eat resistant alloys Ni based Titanium alloys α, near α and α + β R m (MPa) alloys in annealed or aged conditions Malleable cast iron erritic (short chipping) Pearlitic (long chipping) rey cast iron Low tensile strength igh tensile strength Nodular cast iron erritic Pearlitic xtra hard steel ardened and tempered luminium alloys Wrought or wrought and aged ast, non aging ast or cast and aged opper and copper alloys ree cutting alloys (Pb 1%) rass and leaded alloys (Pb 1%) /r Speed v c m/min IRST OI ighest productivity 110 ( ) 50 ( 20 88) 60 ( ) 170 ( ) 140 ( ) 250 ( ) 170 ( ) 170 ( ) 150 ( ) 40 ( 30 80) 350 ( ) 150 ( ) 300 ( ) 300 ( ) 230 ( ) eometry / rade omplementary T T T T T Insert positioning: = entral = Peripheral 64

5 raphs for oromant U and T-Max U drills rilling Net power eed force k c = 2500N/ 2 P c [kw] v c =100 m/min = 0.15 = 0.10 = 0.05 P c = k cfz v c [kw] 240 x 103 (Only for solid drilling) = 0.25 = 0.20 = 0.15 = 0.10 f [kn] k c = 2500 N/ = 0.15 = 0.10 = 0.05 f = 0.5 k cfz sinκ r [N] 2 (Only for solid drilling) = 0.25 = 0.20 = 0.15 = 0.10 = 0.05 = [] [] 2 ompensation factors for different cutting speeds v c m/min actor The graphs show nominal values which should not be regarded as strict recoendations. The values may need adjusting depending on the machining conditions e.g., the type of material. Note that only net power ratings are given. llowance must be made for the efficiency of the machine and the cutting edge wear. 65

6 rilling Specifications for oromant U 2 R ylindrical shank lat according to ISO rill diameter, ole tolerance Tolerance, ± 0.15 ( ) ± 0.20 ( ) Max hole depth, l 4 2 x = prograing length 3 R ylindrical shank lat according to ISO rill diameter, ole tolerance Tolerance, ± 0.15 ( ) ± 0.20 ( ) Max hole depth, l 4 3 x = prograing length 4 R ylindrical shank lat according to ISO rill diameter, ole tolerance Tolerance, Max hole depth, l ± x = prograing length 3 R oromant apto rill diameter, ole tolerance Tolerance, Max hole depth, l ± 0.15 ( ) ± 0.20 ( ) 3 x = prograing length 66

7 Specifications for oromant U rilling 4 R oromant apto rill diameter, ole tolerance Tolerance, ± 0.20 Max hole depth, l 4 4 x = prograing length 3 R ompatible with S holders rill diameter, ole tolerance Tolerance, ± 0.15 ( ) ± 0.20 ( ) Max hole depth, l 4 3 x = prograing length 4 R ompatible with S holders rill diameter, ole tolerance Tolerance, Max hole depth, l ± x = prograing length 3 R oromant Whistle Notch shank rill diameter, ole tolerance Tolerance, ± 0.15 ( ) ± 0.20 ( ) Max hole depth, l 4 3 x = prograing length 67

8 rilling Specifications for oromant U Socket head cap screw ylindrical shank R lat according to ISO 9766 rill diameter, ole depth ole tolerance utting fluid: x mulsion = prograing length l 21 = Recoended max drilling depth Plunge drills 4 R rill diameter, Tolerance, Max hole depth, l ± x = prograing length 68

9 Specifications for T-Max U rilling Left hand drills oromant Whistle Notch shank 2.5 R rill diameter, Tolerance, Max hole depth, l ± x = prograing length Stack drills oromant Whistle Notch shank rill diameter, Tolerance, ± 0.20 Max hole depth, l x = prograing length Indexable drills Varilock coupling rill diameter, Tolerance, Max hole depth, l ± x = prograing length Trepanning drills Varilock coupling 85 rill diameter, Tolerance, Max hole depth, l ± x = prograing length 69

10 rilling Varying the hole diameter with a rotating drill The ability to adjust the diameter of an indexable insert drill is an important feature which extends the working area of one drill and reduces the need to have several close diameter versions in stock. Moreover, the ability to accurately set the cutting edges of indexable insert drills means that they take on a wider role as a high-productivity tool that makes close-tolerance holes. Tolerances within +/ can be held. n adjustable, specially designed tool holder for drills simplifies precision setting. This is a precision toolholder ensuring high accuracy and stability for drilling. It makes it easier to compensate for diameter deviations or to off-set the drill to make additional hole diameters. Sleeves are used to adapt various ISO shank sizes for one holder and make it possible to widen the application area for indexable insert drills and rotating tools, such as on machining centres. Two adjustable toolholder sizes are available, taper 40 and 50 with each series including oromant apto adaptor as well as two different types of solid holders. Taper 40 size holders will take drill diameters of 12.7 to while taper 50 size takes 12.7 to The adjustment of the drill is always performed with the peripheral insert edge on a level with the centre-line of the holder. Setting is easily done by turning the scale ring surrounding the holder, marked in increments of 0.05, indicating a diametrical movement of the tool. The scale has a zero mark as a nominal setting for the holder only. The adjustable toolholder will always set the peripheral insert of the drill on a level with the centre-line of the holder to ensure correct radial adjustment. djustment/setting is made by turning a scale ring surrounding the holder marked in increments of 0.05, indicating the diametrical movement of the drill. The scale also has a zero mark, as a nominal setting for the holder only. The adjustment range for the the drill should not be exceeded and it may be necessary to machine with a smaller feed rate. djustable toolholder for rotating drills. Setting of the holder can be made in a presetting unit, preferably one equipped with projector and electronic scanning facility. Initially the true nominal diameter for each drill has to be measured. The adjustment of the drill position can then be carried out to the hole diameter required. The setting range of the holder (+1.4/-0.4 on the diameter) does not correspond with the setting range for oromant U-drills in diameters 16.5, 17 and 25, this value has to be carefully checked in the ordering information before Max Min Radial adjustment of rotating drills, in increments of Radial adjustment 0.2 / ole tolerances: down to ± 0.05 setting, and should never be exceeded. diameter below the nominal value of the drill should never be considered. urther adjustments after the basic setting can normally be performed outside the presetting unit by refering to the scale only. our locking screws keep the set value in position. efore the setting procedure coences these screws must be slackened off. The sleeve should be removed and cleaned when it is not in use for long periods. 70

11 Radial adjustment for oromant U rilling oromant U drills 2 oromant U drills 3 T-Max U drills Left hand drills 2.5 rill diameter Radial adjustment (max) rill diameter Radial adjustment (max) rill diameter Radial adjustment (max) Max Stationary drill Stationary drill or ororill radial adjustment values, see page

12 rilling oromant U drill R416.2 Standard inserts: rill diameter Mounting type ylindrical with flat and ylindrical Mounting Size dm m oromant Whistle Notch oromant apto Varilock ompatible with S holders Mounting Size 5m LMX 02, = LMX 03, = LMX 04, = WMX 05, = WMX 06, = WMX 08, = , 20 1), 25, 32 16, 20, 25, 32 3, 4, 5, 6 50, , 25, 32 20, 25, 32 3, 4, 5, 6 50, , 32 25, 32 4, 5, 6 50, , 40 25, 32, 40 4, 5, 6 50, , 40 5, 6 50, , ) lso as short cylindrical with flat in drill diameter LMX oromant apto WMX ylindrical with flat (acc. to ISO 9766) ylindrical (Same length as ISO 9766) Varilock Short cylindrical with flat (Only shank size 20) oromant Whistle Notch ompatible with S holders Options iameter rill length l 3s rill depth l 4 Mounting type depending on other parameters c c Max 235 ylindrical with flat, acc. to ISO 9766 YLP, ylindrical same length as ISO 9766 YL Short cylindrical with flat YL oromant Whistle Notch WN oromant apto apto Varilock VL ompatible with S holders S Rotate apto coupling 180 Yes or No dm m -/ 5m Taper length ch Prograing length lute length l 6 Mounting size see above Max Recoened value depending on other parameters , Recoended value must be used to obtain required l 3s or l 4 72

13 T-Max U stack drills R rilling ISO M No. Material rill dia. eed Speed eometry / rade P M Insert positioning v c /r m/min = entral and peripheral Unalloyed steel / Non hardened / % /235 Low-alloy steel / Non hardened / /235 Stainless steel / erritic, Martensitic / % r /235 ustenitic / Ni > 8% / % r / ustenitic / erritic /235 (duplex) /235 Stainless steel / ustenitic castings / /235 pplication area The drill is specially designed for drilling holes in stacked components, with or without air gaps. The max recoended gap is 1. The combined features of geometry and position of the inserts produce a smaller end disc as different from conventional drills upon break through of the hole. This avoids the danger of inserts crushing. T-MX U stack drill R Note! Only use WMX-56 SR as central inserts WMX-SR The drill body is designed in the same way as other T-Max U drills with the exception of the inserts and insert seats. Two types of inserts are used, a trigon insert with facets (WMX xx xx SR) and a triangular insert (TMT xx xx xx). TMT The centre insert (WMX) is positioned so that its centre point begins cutting first and is placed somewhat in front of the periphery insert. ence machining starts at the centre and continues outwards to the periphery. The small end disc which is formed when drilling a through-hole can easily be flushed down any of the large chip channels. R xxx nd disc (stack drill) R416.2-xxx nd disc 73

14 rilling Inserts for T-Max U stack drills R entral WMX Peripheral TMT Insert code imensions, = Peripheral Insert = entral Insert ll round geometry 05 WMX SR WMX 06 T3 SR WMX SR TMT TMT 16 T TMT l i d 1 s r ε Inserts for T-Max U trepanning drills R416.7 entral and Peripheral WMX entral TMT Insert code = Peripheral Insert = entral Insert imensions, ll round geometry 06 WMX 06 T3 08 R-53 WMX 06 T3 08 R-51 Optimized geometry 06 WMX 06 T WMX 06 T TMT 16 T3 08-UR l i d 1 s r ε

15 raphs for T-Max U trepanning tools R416.7 rilling Net power eed force P c [kw] 40 ( ) P c = a f k v p n cfz c 1 a p [kw] f [kn] 8 f = 0.5 a p k cfz sin κ r [N] v c = 200 m/min = 0.3 /r k c = 2200 N/ 2 = 0.15 /r v c = 100 m/min k c = 2750 N/ 2 = 0.3 /r k c = 2200 N/ 2 = 0.15 /r k c = 2750 N/ eed force for = 0.10 /r = 0.20 /r = 0.30 /r k c = 3000 N/ 2 k c = 2500 N/ 2 k c = 2200 N/ [] [/r] Trepanning torque M c [Nm] 1400 M c = f k a c n cfz p 1 a p ( [Nm] 2000 ) utting fluid flow q [l/min] a p = [/r] Recoended Min. The cutting fluid quantity is measured at the cutting edge of the drill c [] The graphs show nominal values which should not be regarded as strict recoendations. The values may need adjusting depending on the machining conditions e.g., the type of material. Note that only net power ratings are given. llowance must be made for the efficiency of the machine and the cutting edge wear. 75

16 rilling utting data for T-Max U trepanning tools R416.7 ISO M Material rill No. dia eed Speed eometry / rade IRST OI ighest productivity omplementary P Unalloyed steel Non hardened % Non hardened % / / /235-56/ Non hardened % Non hardened % igh carbon & carbon tool steel /235-56/235 Low-alloy steel 02.1 Non hardened ardened /235-53/235 /r v c m/min igh-alloy steel nnealed nnealed SS ardened tool steel ardened steel /235-53/ /235-53/235 M K Steel castings 06.1 Unalloyed / / Low alloyed /- -53/235 (alloying elements 5%) Stainless steel erritic, Martensitic 13 25% r / /235 Stainless steel ustenitic Ni > 8% 18-25% r /235-56/235 Malleable cast iron 07.1 erritic (short chipping) Pearlitic (long chipping) /13 rey cast iron 08.1 Low tensile strength igh tensile strength / /13 N Modular cast iron 09.1 erritic Pearlitic luminium alloys -53/13 Wrought solution treated & aged ast ast, solution treated & aged opper and copper alloys 33.1 ree cutting alloys (Pb 1%) rass and leaded bronzes (Pb 1%) /13-53/13-53/13-53/13 Insert positioning: = entral and peripheral inserts 76

17 pplication hints for T-Max U trepanning tool R416.7 rilling pplication area The drill is designed for drilling solid workpieces as well as stacked components with or without air gaps. Solid workpiece Normally the trepanning tool is used for drilling solid workpieces. entral L Peripheral R Standard cartridge is used together with WMX insert size 06 in both peripheral and inner cartridges. Workpiece without air gaps When a stack component is drilled, an Sartridge for stack drilling must be used to avoid end disc problem. WMX insert size 06 should be used in both peripheral and inner cartridges. Inner L S Peripheral R S Workpiece with air gaps To avoid problems with the end disc between the plates an inner cartridge L4-1 together with TMT size 16 must be used (see fig. 1). Inner L4-1 Peripheral R S When this inner cartridge is used, no end disc will be formed between the workpieces (see figs. 2 and 3). s peripheral cartridge, use Sartridge with WMX insert size 06. ig. 1 WMX ore TMT ore ig. 2 ig. 3 77

18 rilling olding instructions for T-Max U trepanning drills R416.7 and indexable drills R416.9 ssembly instructions Note, when using Varilock basic holders: When machining with T-Max U drills R416.9 and R416.7, the original screw and lock nut in the Varilock basic holder must be replaced by a centering sleeve ( ) and screw ( ), which must be ordered separately. T-MX U holder T-MX U holder Varilock holder oolant oolant Varilock holder oolant Mounting of drill into holder Left hand thread Left hand thread 1. If the Varilock basic holder is used, remove the Varilock nut and screw from the basic holder, using Varilock key Twist the screw two full turns into the holder (Varilock or T-Max U holders). Tight clockwise Untight counter clockwise 3. it the centering sleeve into the rear of the drill. 4. Screw drill and holder (Varilock or T-Max U holders) together using key nsure that the driving dog is aligned with the driving slot. Then tighten with a torque wrench. Tightening torque Nm. 78

19 oromant U step and chamfer drill rilling igh productivity three tools in one Operations utting data recoendations hoose cutting data according to the drilling operation Reduce cutting data when step drilling hoose corner radius 0.4 for step/chamfer insert. If stronger insert is needed, choose radius 0.8. or alternative step/chamfer inserts, see Turning tool catalogue. Recoended step and chamfer inserts ISO oroturn 107 TMT TMT TMT TMT TMT TMT TMT 06 T1 04-U 06 T1 04-M 06 T1 04-K P M K P M K 16 T3 04-P 16 T3 04-M 16 T3 04-K U UM 16 T3 04-U 16 T3 04-UM 79

20 rilling oromant U drill, step and chamfer drill rill diameter Mounting type ylindrical with flat and ylindrical oromant Whistle Notch oromant apto Varilock ompatible with S holders 1 Mounting Size dm m Mounting Size 5m , 20, 25, 32 16, 20, 25, 32 3, 4, 5, 6 50, , 25, 32 20, 25, 32 3, 4,, 6 50, , 32 25, 32 4, 5, 6 50, , 40 25, 32, 40 4, 5, 6 50, , 40 5, 6 50, , Standard inserts: LMX 02, 1 = LMX = LMX 04, 1 = WMX 05, 1 = WMX 06, 1 = WMX 08, 1 = LMX WMX Options No of extra inserts 1 rill alternative κ r1 ch 1 l ch1 2 l 21 rill alternative κ r2 1 or 2 1 extra insert; rill diameter extra inserts; rill diameter Step/boring = 1. hamfer = 1 hamfer angle 1 = 15º-90º hamfer width 1 = Length chamfer lch1 = Step/boring diameter Length to step/boring Step/boring = 2. hamfer = 2 hamfer angle 2 = 15º-90º ch 2 l ch2 3 l 22 l 3s oupling Rotate apto coupling 180 dm m / 5m oupling unit hamfer width 2 = Length chamfer lch2 = Step/boring diameter Length to step/boring Reach length Type Yes or No oupling size M=metric or U=inch Prograing length

21 oromant U drill step and chamfer drill rilling Type TM l ch1 = l ch1 = l 21 = l 3s = l 21 = l 22 = l 3s = l 21 = l ch2 = l ch1 = l 3s = Type S l 21 = l 3s = l 21 = l 22 = l 3s = l 21 = l 22 = l 3s = l 21 = l 22 = l 3s = l 21 = l ch2 = l ch1 = l 3s =

22 rilling esignations and formulas for drilling esignation acc. to ISO Terminology Unit a p l 1 l 2 l 3 l 3s l 4 v c n v f f z k c k c 0.4 k cfz f µ M c M µ P c P µ κ r λ sh q p rill diameter utting depth Prograing length to outer corner Prograing length to chisel edge Total length Max. operating length to outer corner Max. operating length to chisel edge Recoended max. operation length utting speed Spindle speed eed speed eed per rev. eed per tooth Specific cutting force Specific cutting force for fz = 0.4 Specific cutting force for feed per edge eed force eed force caused by friction Torque Torque caused by friction Net power (cutting power) Power caused by friction Tool cutting edge angle Tool normal rake angle utting fluid quantity utting fluid pressure m/min r/min /min /r /z N/ 2 N/ 2 N/ 2 N N Nm Nm kw kw egrees egrees l/min Mpa utting depth, a p Solid drilling Trepanning Tool cutting edge angle, κ r Tool normal rake angle, λ sh Specific cutting force for feed per edge, k cfz ( ) (N/ 2 ) k cfz = k c f z x sinκ r 82

23 rilling ormulas for oromant 880, oromant U, T-Max U, oromant elta and ororill elta- utting speed (m/min) eed speed (/min) eed force (N) 1) Torque (Nm) 1) v c = π n 1000 v f = n f = 0.5 k cfz sinκ r (N) 2 M c = k cfz a p (1 a p ) 2000 Net power (kw) 1) P c = k cfz v c 240 x ) eed force, torque and power at idling is not included in these formulas. The power requirement is calculated on the basis of an unused tool, i.e. tool without wear. or a tool with normal wear, the power requirement is 10-30% higher, depending upon the size of the drill. Specific cutting force k c for f z = 0.4 for different materials M Material Specific cutting No. 1) force, k c 0.4 N/ Unalloyed = 0.15% steel = 0.35% = 0.60% Low alloy steel Non-hardened ardened and tempered ardened and tempered ardened and tempered igh alloy steel nnealed ardened Stainless steel Martensitic/ferritic ustenitic Steel castings Unalloyed Low alloyed high alloyed ard steel ardened steel 55 R Manganese steel 12% Malleable cast iron erritic Pearlitic rey cast iron Low tensile strength igh tensile strength Nodular cast iron erritic Pearlitic hilled cast iron eat resistant alloys e-base, annealed e-base, aged Ni- or o-base, annealed Ni- or o-base, aged Ni- or o-base, cast luminium alloys Non heat treatable eat treatable luminium alloys, Non heat treatable cast eat treatable opper and Lead alloys, Pb > 1% copper alloys rass, red brass ronze and leadfree copper including electrolytic copper 1) The k c 0.4-values are valid for: f z = 0.4 /z, κ r = 90, λ sh = +6 83

24 rilling If problems should occur Indexable insert drills When cutting edges wear down prematurely giving poor tool-life, the cause is usually incorrect cutting data, wrong insert grades or even drill type or poor cutting fluid supply. Instability and poor cutting fluid supply also lead to poor tool-life. When cutting edges chip, the alignment of the drill should be checked for it should be within the recoended limits. oncentricity should be within +/ Lack of rigidity in the set-up, tool or machine often lead to chipping, necessitating a tougher cutting edge. If the insert is not seated or retained securely, chipping may occur. Insert seats and screws have to be well maintained in high performance drills with frequent changing of insert screws recoended. nother important factor is how securely the drill is held in the machine for stability during machining tool holding quality is important. If over or under sized holes are produced, the reason is often that the drill is offcentre. Other reasons can be that the machine spindle is out of true, the feed rate is too high or a lack of rigidity in the set-up. If the hole is not syetrical, the source of the problem can often be traced back to a lack of stability through poor rigidity in set-up or machine. It is also possible that the cutting data is wrong for the material in question. Unsatisfactory surface finish is usually the result of vibrations arising from poor rigidity in the machining set-up. The drill may be excessively long, held in a poor quality tool holder or tool position, the cutting data may be incorrect for the application or the initial penetration may be into poor surfaces. utting fluid supply may be insufficient or chip control not good enough, where chip evacuation is irregular. The limiting parameters of tool wear in drilling are generally security or hole quality. xcessive wear and built up edge that distorts the cutting geometry excessively are hazards that affect how reliably a drill will make the required number of holes. ood tool holding is vital. Off-centre drill usually produces incorrect hole sizes. 84

25 Practical tips for drilling if problems occur rilling (1) (2) Problems ront face of drill broken Wear on outside diameter of drill Oversized or undersized hole hip-jaing in drill flutes Vibrations utting edge frittering Unsyetrical hole Poor tool-life Possible remedies Re-align the drill Increase coolant flow, clean filter, clear drill coolant holes Select a tougher grade Improve stability, improve component fixuring, shorten drill overhang heck bottom of hole or disk for possible centre stub (only oromant U) heck cutting speed and feed against recoendations heck insert/drill grade against recoendations Increase cutting speed Remedies and solutions Problems Re-align the drill Increase coolant flow, clean the filter, clear coolant holes in drill Select a tougher grade Reduce the feed Improve the heck bottom stability, reclamp of hole or disk component, for centre stub shorten drill (only oromant overhang U-drill) heck Speed/ feed guidelines heck the carbide grade Increase the speed ront face of drill broken Wear on outside diameter of drill Oversize/undersize hole hip jaing in the drill flutes Vibrations Small cutting edge fracture (frittering) ole not syetrical Poor tool life 85

26 rilling asic hints for successful drilling - check machine alignment, stability, quality of tool holding and fixturing - check the power, feed force and torque available at machine spindle - check coolant pressure and flow rates available - select the right tool for the operation, apply correctly and optimize - optimize as regards combination of high cutting speed and feed rate for good chip evacuation - maintain tools regularly - change the insert-clamping screw on a regular basis dditional measures for optimizing drilling - check on the suitability of the drill for the operation - choose the best option available - establish a reliable, predetermined tool-life program - use minimum diameter drill and follow recoended insert overlapping - establish correct feed rates for drilling irregular, rounded and angular surfaces and cross holes - be aware of the versatility of indexable insert drills for a variety of operations from efficiently drilling a hole to precision hole machining 86

27 Uncoated emented arbide W (13, P20, K20) rilling 13 - (N15, S20, K25) 13 is a fairly fine grained grade with a very good balance between wear resistance and toughness making it a very versatile grade suitable for many materials and applications. Used for milling of heat resistant alloys at moderate cutting speed and feed, milling of aluminum alloys and finishing to medium machining of cast iron. Very suitable for nodular cast iron. P20 - (P20) cemented carbide containing titanium based carbides adding wear resistance and hot hardness. The carbide is PV coated, with a 3 micron TiN layer. Used for oromant elta drills in general steel applications. K20 - (M30, K20, N15, 20) carbide grade with a balanced combination of wear resistance and toughness making it a very versatile grade suitable for many materials and applications. The carbide is PVoated, with a 3 micron TiN layer. Used for oromant elta drills in stainless steel, cast iron, aluminum and heat resistant materials. oated emented arbide (235, 1020, 1025, 1044, 1120, 1210, 1220, 3040, 4014, 4024, 4044, N20) TiN Ti (,N) Ti (P40, M35) 235 has a very tough carbide substrate, which provides extremely good edge security in toughness demanding operations. The carbide is coated with a 2.5 micron Voating of Ti- TiN-TiN for added wear resistance and lower friction. 235 is used as a complementary grade for unstable conditions and low to moderate cutting speeds. TiIN (P40, M35, K25) ine grained cemented carbide with an excellent combination of both hardness and toughness. The fine grains contribute to keeping the cutting edge sharp throughout the entire tool life. The carbide is PV coated with a 3 micron bronze colored TilN layer giving excellent edge toughness and resistance against built-up edge. The basic choice for central drilling inserts in all materials. Ti (,N) (P40, M35, K25) ine grained cemented carbide with an excellent combination of both hardness and toughness. The fine grains contribute to keeping the cutting edge sharp throughout the entire tool life. The carbide is PV coated with 3 microns of TiN for improved wear resistance. Versatile grade suitable both as central and peripheral insert in a variety of materials at low to moderate cutting speeds. Ti (,N) TiN TilN IrN (P40, M35, K25) ine grained cemented carbide with a good balance between hardness and toughness. The carbide is PVoated with a 3 micron layer of TiN for added wear resistance. basic grade for peripheral inserts at low to moderate cutting speeds in steel, austenitic stainless steel and cast iron (P35, M30, K20) ine grained cemented carbide with an excellent combination of both hardness and toughness. The fine grains contribute to keeping the cutting edge sharp throughout the entire tool life. The carbide is PV coated with 4 microns of TilN for improved wear resistance and resistant against builtup edge in smearing materials. universal grade with excellent resistance and toughness at low to moderate cutting speeds in most materials (P10, K10) ard and very wear resistant carbide substrate containing titanium based carbides, which adds a very good hot hardness. The carbide is coated with lrn giving excellent wear resistance and even better resistance against high cutting temperatures. Ideal grade in oromant elta for drilling at medium to high speed in both cast iron and steel. 87

28 rilling TiIN l 2 O (P20, M20, K20, N20, 20) ine grained cemented carbide with an excellent combination of both hardness and toughness. The carbide is PVoated with 3 microns oano multilayers of TilN coating giving very good edge line security. irst choice grade for steel, stainless steels and cast iron in oromant elta. Ti (,N) (P20, M20, K20) 4024 has a cemented carbide substrate with a good balance between hardness and toughness. The substrate is coated with a MT-V layer of TiN giving excellent abrasive wear resistance, followed by a layer of l 2 O 3 giving very good high temperature protection. The total thickness is about 9 microns. very universal grade for peripheral inserts in steel, stainless steel and cast iron at medium to high cutting speed. l 2 O 3 Ti (,N) (P20, M20, K20, 15) cemented carbide with a high hardness and toughness. MT-V layer of TiN giving excellent abrasive wear resistance, followed by a layer of l 2 O 3 giving very good high temperature protection. The total thickness is about 9 microns. The grade is first choice for peripheral drilling inserts in most materials. Work very well at both medium and high cutting speed. Ti (,N) l 2 O 3 Ti (,N) Ti (,N) (P40, M35, K25) ine grained cemented carbide with an excellent toughness. The carbide is PV coated with a 3 micron black colored TilN layer for improved wear resistance and resistance against built-up edge. The tough choice for peripheral drilling inserts in all materials (P15, K15) hard carbide substrate with a thin cobalt enriched gradient zone just underneath the coating. This enables the grade to withstand high cutting temperatures with maintained edge line security. On top of this is a MT-V layer of TiN giving excellent abrasive wear resistance, followed by a layer of l 2 O 3 giving very good high temperature protection permitting high metal removal rates. The ideal grade for peripheral insert in finishing to light roughing of steel, steel castings and cast iron at low to medium feed rates at high cutting speed. N20 - (N20) fine grained cemented carbide with an excellent combination of both hardness and toughness. The fine grains contribute to keeping the cutting edge sharp throughout the entire tool life. The carbide is PV coated with smooth TilN adding wear resistance and lowering adherence to work material on the cutting edge. irst choice for luminum with a Silicon content up to 12%. 88

29 rades for oromant U drills rilling P ISO NSI 8 7 asic grades Wear resistance Steel Toughness M Stainless Steel K ast iron ISO ISO NSI NSI asic grades asic grades Wear resistance Toughness Wear resistance Toughness Wear resistance N Non-ferrous metals ISO NSI asic grades Toughness Wear resistance S eat resistant and Titanium alloys ISO NSI asic grades Toughness Wear resistance ardened materials ISO NSI asic grades Toughness Wear resistance 89

30 rilling 90