Table of contents BRAZED TURNING TOOLS Toolholders 2 Tips 6 Rods 8 9 1
ISO External holders General turning External Ordering Tip According to ISO243-1975 (DIN 4982-198) h b l 1 f 1 f 2 a p r ε γ 1) λ 2) P1 P2 P3 P4 K1 K2 ISO 6 (DIN 498) κ r 9 ISO 1 (DIN 4971) κ r 75 ISO 2 (DIN 4972) κ r 45 ISO 5 (DIN 4977) κ r 9 ISO 6 R 11 C8 1 1 9 14 6 8,4 12 L 11 ISO 6 R 1212 C1 12 12 1 17 7,5 1,4 12 L 1212 ISO 6 R 1616 C12 16 16 11 22 1 12,4 12 L 1616 ISO 6 R 22 C16 2 2 125 28 12 16,8 12 L 22 ISO 6 R 2525 C2 25 25 14 35 15,5 2 1,2 12 L 2525 ISO 6 R 3232 C25 32 32 17 44 2 25 1,2 12 L 3232 h b l 1 f 1 a p r ε γ 1) λ 2) ISO 1 R 1616 C12 16 16 11 1 11,4 12 L 1616 ISO 1 R 22 C16 2 2 125 12 15,8 12 L 22 ISO 1 R 2525 C2 25 25 14 15 18 1,2 12 L 2525 h b l 1s l 1 f 1 f 1s a p r ε γ 1) λ 2) ISO 2 R 11 C8 1 1 9 84 16 1 6,4 12 L 11 ISO 2 R 1212 C1 12 12 1 93 17 1 7,4 12 L 1212 ISO 2 R 1616 C12 16 16 11 12 24 16 8,8 12 L 1616 ISO 2 R 22 C16 2 2 125 114 3 19 11,8 12 L 22 ISO 2 R 2525 C2 25 25 14 127 37 24 13 1,2 12 L 2525 ISO 2 R 3232 C25 32 32 17 153 46 29 17 1,2 12 L 3232 12 h b l 1 f 1 a p r ε γ 1) λ 2) ISO 5 R 1616 C12 16 16 11 24 12,4 12 ISO 5 R 22 C16 2 2 125 3 16,8 12 L 22 ISO 4 (DIN 4976) κ r 9 Neutral style shown 1) γ = Rake angle. 2) λ = Angle of inclination. κ r = Entering angle h b l 1 a r a p r ε γ 1) λ 2) ISO 4 11 C1 1 1 9 1 1,4 12 ISO 4 1212 C12 12 12 1 12 12,4 12 ISO 4 1616 C16 16 16 11 16 16,8 12 ISO 4 212 C12 2 12 125 12 12,4 12 ISO 4 22 C2 2 2 125 2 2 1,2 12 ISO 4 2525 C25 25 25 14 25 25 1,2 12 Ordering example: 2 pieces ISO 6 R 11 P1 R = Right hand, L = Left hand 9 2
ISO External holders Parting/Grooving External Ordering Tip According to ISO243-1975 (DIN 4982-198) h b l 1 a r a p γ 1) λ 2) P1 P2 P3 P4 K1 K2 ISO 7 (DIN 4981) κ r 9 ISO Internal holders General turning Internal According to ISO243-1975 (DIN 4982-198) ISO 9 (DIN 4974) κ r 92 ISO 9 (DIN 4974) κ r 92 ISO 8 (DIN 4973) κ r 75 ISO 8 (DIN 4973) κ r 75 dm m ISO 7 R 16 D3 1 6 9 12 3 12 ISO 7 R 128 D3 12 8 1 12 3 12 L 128 ISO 7 R 1212 D3 12 12 1 12 3 12 ISO 7 R 161 D4 16 1 11 14 4 12 L 161 ISO 7 R 1616 D4 16 16 11 14 4 12 ISO 7 R 212 D5 2 12 125 16 5 12 L 212 ISO 7 R 22 D5 2 2 125 16 5 12 L 22 ISO 7 R 2516 D6 25 16 14 2 6 12 L 2516 ISO 7 R 2525 D6 25 25 14 2 6 12 L 2525 ISO 7 R 322 D8 32 2 17 25 8 12 L 322 ISO 7 R 425 D1 4 25 2 32 1 12 L 425 Ordering example: 2 pieces ISO 7 R 16 P2 R = Right hand, L = Left hand Ordering Tip h = b h 1 l 1 l 3 f 1 a p D c γ 1) λ 2) ISO 9 R 88 A5 8 6,4 125 4 11 3,1 14 12 ISO 9 R 11 A6 1 8 15 5 14 4 18 12 ISO 9 R 1212 A8 12 9,6 18 63 17 5,1 21 12 ISO 9 R 1616 A1 16 12,8 21 8 22 6,2 27 12 ISO 9 R 22 A12 2 16 25 1 28 8,3 34 12 ISO 9 R 2525 A16 25 2 3 125 35 1 43 12 ISO 9 R 3232 A2 32 25,6 355 16 44 12 52 12 dm m h 1 l 1 f 1 a p D c γ 1) λ 2) ISO 9 R 8 A5 8 6,4 125 7 3,1 14 12 ISO 9 R 1 A6 1 8 15 9 4 18 12 ISO 9 R 12 A8 12 9,6 18 11 5,1 21 12 ISO 9 R 16 A1 16 12,8 21 14 6,2 27 12 ISO 9 R 2 A12 2 16 25 18 8,3 34 12 ISO 9 R 25 A16 25 2 3 22,5 1 43 12 P1 P2 P3 P4 K1 K2 h = b h 1 l 1 l 3 f 1 a p D c γ 1) λ 2) ISO 8 R 11 A6 1 8 15 5 14 3,8 18 12 ISO 8 R 1212 A8 12 9,6 18 63 17 4,8 21 12 ISO 8 R 1616 A1 16 12,8 21 8 22 5,7 27 12 ISO 8 R 22 A12 2 16 25 1 28 7,6 34 12 ISO 8 R 2525 A16 25 2 3 125 35 9,5 43 12 dm m h 1 l 1 f 1 a p D c γ 1) λ 2) ISO 8 R8 A5 8 6,4 125 7 3 14 12 1) γ = Rake angle. 2) λ = Angle of inclination. κ r = Entering angle dm m Ordering example: 2 pieces ISO 9 R 88 P2 R = Right hand 3
Coromant standard toolholders General turning External Ordering Tip h b l 1 f 1 r ε γ 1) P1 P2 P3 P4 K1 K2 115 R 115-212 G1 2 12 125 15,5 1,5 5 R 115-2516 G12 25 16 14 2,5 2,5 5-2516 R 115-322 G16 32 2 17 24,813,5 L -322 164 h b l a l 1 r ε v γ 1) λ 2) 164-25 16 34 CR16 25 16 4,6 14,5 34 164-25 16 36 CR16 25 16 4,3 14,5 36 164-25 16 38 CR16 25 16 3,9 14,5 38 Neutral style shown 1) γ = Rake angle. 2) λ = Angle of inclination Ordering example: 2 pieces R 115-2516 P2 2 pieces L 115-2516 P3 R = Right hand, L = Left hand Threading These tools are designed for use in CRI-DAN type B machines. Tools for CRI-DAN machines types A, C, D and TT are manufactured to order. Ordering Tip h b l 1 f 1 a p γ 1) λ 2) P1 P2 P3 P4 K1 K2 166 External R 166-1 FT16 2 2 12 1,5 2,6 166 Internal 1) γ = Rake angle. 2) λ = Angle of inclination D 1 h=b h 1 l 1 l 3 a p f 1 D c γ 1) λ 2) R 166-11 FU12 1 16 8 14 3 1,7 14 15 R 166-12 FU12 15 2 1 16 4 1,7 19 2 R 166-13 FU14 18 25 12,5 18 5 2,1 24 25 Ordering example: 2 pieces R 166-1 P1 R = Right hand 9 4
Coromant standard toolholders Round shank boring tools Internal 141 κ r 9 Ordering Tip dm m h l 1 f 1 a p D c γ 1) λ 2) BRAZED TURNING TOOLS P1 P2 P3 P4 K1 K2 L 141-8 3) 8 7 24 1,9 7 3 12 5 L 141-1 A8 1 8,5 5 4,6 8 55 12 5 L 141-12 B1 12 1,5 6 5,6 1 7 12 5 L 141-16 B12 16 14 9 7,6 12 1 12 5 P K Left hand style shown 14 κ r 6 Left hand style shown 1) γ = Rake angle. 2) λ = Angle of inclination 3) Solid carbide dm m h l 1 a p D c γ 1) λ 2) L 14-6 3) 6 5,5 18 6, 2 12 5 L 14-8 3) 8 7, 24 7,5 3 12 5 L 14-1 A8 1 8,5 5 6,5 55 12 5 L 14-12 B1 12 1,5 6 8,5 7 12 5 L 14-16 B1 16 14,8 9 1, 1 12 5 Ordering example: 2 pieces L 141-8 P2 L = Left hand 9 5
Tips Ordering P K l a iw s r ε α n S1P S4 S6 1P 1 13A Styles A, B Style A shown. Style B opposite hand Style AC According to ISO 242-1975 (DIN 495-1962) A5 5 3 2 2 A6 6 4 2, 5 2, 5 A8 8 5 3 3 A1 1 6 4 4 18 A12 12 8 5 5 18 A16 16 1 6 6 18 A2 2 12 7 7 18 A25 25 14 8 8 18 A32 32 18 1 1 18 B1 1 6 4 4 18 B12 12 8 5 5 18 B16 16 1 6 6 18 B2 2 12 7 7 18 B25 25 14 8 8 18 B32 32 18 9 9 18 l a iw s r ε AC15 15 13 2,5 2 AC2 2 13 2,5 2 AC25 25 13 2,5 3 Style BO l a iw s BO1 9,9 9,9 3 BO13 12,5 12,5 4 Style C l a iw s α n According to ISO 242-1975 (DIN 495-1962) C6 6 4 2,5 C8 8 5 3 C1 1 6 4 18 C12 12 8 5 18 C16 16 1 6 18 C2 2 12 7 18 C25 25 14 8 18 C32 32 18 1 18 Style CR l l a iw s v CR16 18 5,4 16 6 32 CR2 22 7,1 2 6 32 CR25 3 9,4 25 8 34 Tolerances, mm Dimension Tolerance 6 6 12 12 25 25 5 5 1 >1 +,3 +,4 +,6 +1, +2, 3% Ordering example: 1 pieces A5 S4 9 6
Tips Ordering l a l s α n S1P S4 S6 1P 13A Style D D3 3 8 3 D4 4 1 4 14 D5 5 12 5 14 D6 6 14 6 14 D8 8 16 8 14 D1 1 18 1 14 D12 12 2 12 14 According to ISO 242-1975 (DIN 495-1962) Style DA l a iw s DA2 12 2,5 1,5 DA3 16 3,5 1,8 DA4 2 4,5 2,5 DA5 25 5, 3, Style E Style FT According to ISO 242-1975 (DIN 495-1962) iw l s α n 2, E4 4 1 5 E5 5 12 3 E6 6 14 3, 5 E8 8 16 4 9 E1 1 18 5 9 E12 12 2 6 9 E16 16 22 7 9 E2 2 25 8 9 iw if 1 l s 1, 1, 1, FT12 3 12 3 FT14 4 2 14 4 FT16 5 5 16 5 Style G iw l s r ε G8 8 12 4 1, G1 1 14 4 1,5 G12 12 17 5 2,5 G16 16 2 6 3,5 G2 2 24 6 4,5 Tolerances, mm Dimension Tolerance 6 6 12 12 25 25 5 5 1 >1 +,3 +,4 +,6 +1, +2, 3% Ordering example: 1 pieces D3 S4 9 7
Tips Ordering l a iw s S1P S4 S6 1P 13A Style K Rods 1) For tolerances, see previous page. K2 2,5 15 4 K3 3,5 15 4 K4 4,5 15 4 K5 5,5 15 4 K6 6,5 15 4 K7 7,5 15 4 K8 8,5 2 6 K1 1,5 2 6 K12 12,8 2 6 Ordering K d l 2 2 Style 68 Ground Tolerances, mm d = ISOh9 l 2 = +2 68-2-75 2 75 68-3-75 3 75 68-4-75 4 75 68-5-75 5 75 68-6-75 6 75 68-8-75 8 75 68-1-75 1 75 Style B-68 Unground Tolerances, mm d 5 mm +,45 +,15 d 6 mm+,55 +,15 l 2 = +2 d l 2 B-68-2-75 2 75 B-68-3-75 3 75 B-68-4-75 4 75 B-68-5-75 5 75 B-68-6-75 6 75 B-68-8-75 8 75 B-68-1-75 1 75 Style B-682 Unground Tolerances, mm Dimension Tolerance 2 5 6 1 13 2 14 +,3 +,4 +,6 +3 l 2 iw s B-682-5-2-14 14 5 2 B-682-5-3-14 14 5 3 B-682-8-2-14 14 8 2 B-682-8-3-14 14 8 3 B-682-8-4-14 14 8 4 B-682-1-3-14 14 1 3 B-682-1-4-14 14 1 4 B-682-1-5-14 14 1 5 B-682-1-6-14 14 1 6 B-682-13-4-14 14 13 4 B-682-13-5-14 14 13 5 B-682-16-4-14 14 16 4 B-682-16-5-14 14 16 5 B-682-16-6-14 14 16 6 B-682-2-5-14 14 2 5 B-682-2-6-14 14 2 6 1) Ground and unground rods in other dimensions and tolerances can be supplied, subject to quotation. Ordering example: 1 pieces K2 13A 9 8
Brazed tools continue to retain their role in tooling programmes because of the ease with which they can be adapted to particular requirements, such as; modified radii, rake angle and special chip breakers. Brazing The brazed joint has two functions: To hold the carbide tip in position despite heavy shearing forces and high temperatures. Must be capable of imizing the stress which occurs during the heating and cooling of the tool material. Shank material A suitable shank material is carbon steel with,7% C and a tensile strength of about 685 N/mm 2 (7 kp/mm 2 ). In order to imize stress, the ratio between the thickness of the carbide tip and the height of the shank material beneath the tip should be approx. 1:3. s/3 s 3s Seat of the tip Arrange the seating of the tip so that the brazing stress is as low as possible. Open tip seats generally give the best result. Only the underside of the tip and one side face (max 1/3 of the tip s thickness) should come into contact with the tool shank. Regrinding is facilitated and the carbide tip s thickness is better preserved if the tip is set at an inclination (γ n2 ) greater than the top-rake angle (γ n1 ). (See next page.) γ nz Cleaning Grind the brazing areas of the tip on a silicon carbide or diamond wheel. Alternatively, they may be shot blasted with steel shot. Degrease the tip, and when necessary the tip-seating of the shank as well, with a suitable solvent such as trichlorethylene or acetone. Brazing agents The brazing method and brazing agents are selected according to the tool s working temperature and calculated stress. The following brazing procedures are recommended: Tools for normal working temperatures: Low-melting silver point solder with appropriate flux. Brazing temperature 65 7 C. Tools with thin and long tips or with a complex design: The tips should be brazed with a shim of copper, thickness,2,3 mm. Silver solder, temperature 65 7 C. Tools for high working temperatures: For example parting tools, heavy roughing tools etc. Use electrolytic, non-acid copper with a melting point of 173 C. Flux: anhydrous borax, or according to recommendations from the supplier of the brazing agent. Brazing or welding torches Mainly suitable for making tools in smaller quantities. Use a slightly reduced flame, for example, a surplus of acetylene gas. Start heating with the flame directed against the under side of the tool and behind the seating of the tip. igh-frequency units Most economical for brazing larger quantities, but are generally limited to small and medium-sized tools. It is important that the shape of the high-frequency coil be matched to the tool. Use plenty of flux. When the solder melts, stop heating and press the tip into position with a pointed iron rod. For standard tools in ordinary grades, gradual cooling is not necessary, but for complicated tools a container with mica or charcoal powder is recommended. Cutting data As a rule a lower cutting speed should be used for brazed tooling than indexable inserts. SAFETY INFORMATION Precautions when grinding and brazing of cemented carbide, see section K. 9
Grinding Grind with care it pays! A stable grinding table or holder, which can be set at the desired angle by means of a graduated scale, and vibration-free running spindles are necessary for a good result. Rough grinding can, as a rule, be carried out with a silicon carbide wheel. Always use a diamond wheel when finish grinding or lapping. Longer cutting edge life and fewer tip breakage, fully justify the increased costs entailed by correct grinding. Keep the grinding wheel clean. Its cutting capacity depends to a large degree on this. Always grind into the cutting edge and, as far as possible, at right angles to it. b a c b a Top face b Secondary clearances c Lapped primary clearances d Chipbreaker groove d α γ n1 γn2 γ n1 Top-rake angle γ n2 Tip seating angle α Clearance angle Top rake angles: γ n1 = 14 Grade S6. γ n2 = 1 Other grades. Most carbides have a low heat conductivity and must, therefore, be ground with care. For wet grinding, the coolant should be applied abundantly and in an even stream. Never cool a carbide tool by quenching. Coromant turning tools usually have the carbide tip set at a greater inclination (λ) than the top-rake angle (γ). Regrinding is facilitated as only the primary rake portion of the top face needs to be ground, and the effective thickness of the tip is better preserved. Sequence of operations for grinding 1. Badly worn or damaged tools a. Grind away shank material under the tip. Aluium oxide wheel grit 24 36. 1 ardness J L. Peripheral speed 2 25 m/sec. α n2 =1 12 Dry grinding. b.grind clearance angles. Silicon carbide wheel (green grit). Grit 38 6, hardness J. Peripheral speed 2 25 m/sec. α n1 = 7 1 Dry grinding. 2. Normally or slightly worn tools and finish lapping of rough-ground tools a.lap top face. Diamond lapping wheel. Grit 18 22, metal bonded. Peripheral speed 12 18 m/sec. Wet grinding. b.lap primary clearances and nose radius. Diamond lapping wheel. Grit 22 32, metal bonded. Peripheral speed 12 18 m/sec. α n1 = 5 7 Wet grinding. y y y α n2 α n1 α n1 Nose radius: For finishing of steel 1,2 2 x the feed. For roughing of steel 3, 4 x the feed. For cast iron use a larger radius than for steel. 3. Grinding of chipbreaker Diamond lapping wheel. Grit 18 22, metal bonded. Peripheral speed 12 18 m/sec. σ Β = 45 Wet grinding. Guide for chipbreaker dimensions Depth of cut mm Feed f n, mm/r,2,35,55 Chipbreaker l B x h B mm 1 1,5 x,3 2, x,4 3, x,5 4 2,5 x,5 3, x,5 4, x,6 9 3, x,5 4, x,6 4,5 x,6 4. Reinforcement of the edge Silicon carbide handlap. Grit 32 4. Alternatively, a boron carbide handlap, or diamond handlap. Grit 32 4. Light handlapping for finishing of steel. In other cases, according to the degree of protection required for the cutting edge.