2-4 RG Series High Rigidity Roller Type Linear Guideway

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1 66 G99TE High igidity oller Type Linear Guideway Advantages and features The new G series from Hiwin features a roller as the rolling element instead of steel balls. The roller series offers super high rigidity and very high load capacities. The G series is designed with a 45-degree angle of contact. Elastic deformation of the linear contact surface, during load, is greatly reduced thereby offering greater rigidity and higher load capacities in all 4 load directions.the G series linear guideway offers high performance for high-precision manufacturing and achieving longer service life. (1) Optimal design FEM analysis was performed to determine the optimal structure of the block and the rail. The unique design of the circulation path allows the G series linear guideway to offer smoother linear motion. (2) Super high rigidity The G series is a type of linear guideway that uses rollers as the rolling elements. ollers have a greater contact area than balls so that the roller guideway features higher load capacity and greater rigidity. The figure shows the rigidity of a roller and a ball with equal volume. (3) Super high load capacity With the four rows of rollers arranged at a contact angle of 45-degrees, the G series linear guideway has equal load ratings in the radial, reverse radial and lateral directions. The G series has a higher load capacity in a smaller size than conventional, ball-type linear guideways. Deformation of Diameter (µm) Lateral Load(kN) (4) Operating life increased The basic dynamic load rating (1km rating) complies with ISO standard (ISO ). The actual load will affect the nominal life of a linear guideway. Based on the selected basic dynamic rated load and the actual load, the nominal life can be calculated by using Eq.2.4. This life formula is different from that for conventional linear ball-type guideways.

2 G99TE ) L = C C 1km = ( ( ) 62mile P P Eq. 2.4 If the environmental factors are taken into consideration, the nominal life will be influenced greatly by the motion conditions, the hardness of the raceway, and the temperature of the linear guideway. The relationship between these factors is expressed in Eq ) L = f h f t C f h f t C 1km = ( f w P ( 62mile f w ) P Eq. 2.5 L : Nominal life P : Calculated load C : Basic dynamic load rating fh : Hardness factor ft : Temperature factor fw : Load factor Where, the hardness factor, the temperature factor and the load factor are the same as a ball-type guideway. Compared with conventional linear ball-type guideways, the G series linear guideway has a higher load capacity that allows it to achieve a longer service life. (5) Durability test Table 2.56 Model of the test system Tested model 1: GH35CA Preload: ZA class Max. Speed: 6m/min Acceleration: 1G Stroke:.55m Lubrication: grease held every 1km External: 15kN Traveling distance: 1135km Test results: The nominal life of the model is 1km. After the traveling distance, fatigue flaking did not appear on the surface of the raceway or rollers. Tested model 2: GW35CC Preload: ZA class Max. Speed: 12m/min Acceleration: 1G Stroke: 2m Lubrication: oil feed rate:.3cm 3 /hr External load: kn Traveling distance: 15km Test results: Fatigue flaking did not appear on the surface of the raceway or rollers after a distance of (15km). Note: The data listed are from these samples.

3 68 G99TE Construction of Block End Cap Cap End seal (Double seals and scraper) ail Grease nipple Bottom seal ollers Circulation path olling circulation system: Block, ail, End cap, Circulation path, rollers Lubrication system: Grease nipple and piping joint Dust protection system: End seal, Bottom seal, Cap, Double seals and Scraper Model Number of G series In order to maintain H-class accuracy, the G series linear guideway is available in only non-interchangeable types. Model numbers of the G series contain the size, type, accuracy class, preload class, etc..

4 G99TE (1) Non-interchangeable type G W 35 C C E E ZA P II + KK/E2 Block Type W : Flange Type H : Square Type Model size 25, 3, 35, 45, 55, 65 Load Type C : Heavy Load H : Super Heavy Load Block Mounting A : Mounting From Top C : Top or Bottom E: Special Block None: Standard Block No. of Blocks per ail No. of ails per matched set 1 Precision Code: H, P, SP, UP Preload Code: Z, ZA, ZB E: Special ail None: Standard ail ail Length (mm) ail Mounting Type : Mounting From Top T : Bottom E2: Self-Lubricant Dust Protection 2 Note: 1. oman numerals are used to express the number of matched sets of rails. 2. for dust protection, no symbol is required if it is standard (end seal and bottom seal only). ZZ: End seal, bottom seal and scraper KK: Double seals, bottom seal and scraper DD: Double seals and bottom seal (2) Interchangeable type Model Number of G Block G W 25 C A E ZA P + ZZ/E2 Block Type W : Flange Type H : Square Type Model size 25, 3, 35, 45, 55, 65 Load Type C : Heavy Load H : Super Heavy Load E2: Self-Lubricant Dust Protection 2 Precision Code : H, P Preload Code : Z, ZA E: Special Block None: Standard block Block Mounting Type A : Mounting From Top C : Top or Bottom Model Number of G ail G E P Interchangeable ail Model size 25, 3, 35, 45, 55, 65 ail Mounting Type : Mounting From Top T : Bottom Precision Code : H, P E: Special ail, None: Standard ail ail Length (mm)

5 7 G99TE Types (1) Block types HIWIN offers two types of guide blocks, flange and square type. Because of the low assembly height and large mounting surface, the flange type is excellent for heavy moment load applications. Table 2.57 Block Types Type Model Shape Height (mm) ail Length (mm) Main Applications Square GH-CA GH-HA Automation Systems Transportation equipment CNC machining centers Heavy duty cutting machines CNC grinding machines Injection molding machines Flange GW-CC GW-HC Plano millers Devices requiring high rigidity Devices requiring high load capacity Electric discharge machines (2) ail types In addition to the standard top mounting type, HIWIN also offers the bottom mounting type of rails. Table 2.58 ail Types Mounting from Top Mounting from Bottom

6 G99TE Accuracy Classes The accuracy of the G series can be classified into four classes: high (H), precision (P), super precision (SP) and ultra precision (UP). Customers may choose the class by referencing the accuracy requirements of the applied equipment. C H A D N B (1) Accuracy of non-interchangeable Table 2.59 Accuracy Standards Unit: mm Item G - 25, 3, 35 Accuracy Classes Dimensional tolerance of height H ±.4 Dimensional tolerance of width N ±.4 High Precision Super Precision Ultra Precision (H) (P) (SP) (UP) Variation of height H Variation of width N unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 Table 2.6 Accuracy Standards Unit: mm Item G - 45, 55 Accuracy Classes Dimensional tolerance of height H ±.5 Dimensional tolerance of width N ±.5 High Precision Super Precision Ultra Precision (H) (P) (SP) (UP) Variation of height H Variation of width N unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 Table 2.61 Accuracy Standards Item G - 65 Accuracy Classes Dimensional tolerance of height H ±.7 Dimensional tolerance of width N ±.7 High Precision Super Precision Ultra Precision (H) (P) (SP) (UP) Variation of height H Variation of width N unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 Unit: mm

7 72 G99TE14-13 (2) Accuracy of interchangeable Table 2.62 Accuracy Standards Item G - 25, 3, 35 Unit: mm Accuracy Classes High (H) Precision (P) Dimensional tolerance of height H ±.4 ±.2 Dimensional tolerance of width N ±.4 ±.2 Variation of height H.15.7 Variation of width N.15.7 unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 Table 2.63 Accuracy Standards Item G - 45, 55 Unit: mm Accuracy Classes High (H) Precision (P) Dimensional tolerance of height H ±.5 ±.25 Dimensional tolerance of width N ±.5 ±.25 Variation of height H.15.7 Variation of width N.2.1 unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 Table 2.64 Accuracy Standards Item G - 65 Unit: mm Accuracy Classes High (H) Precision (P) Dimensional tolerance of height H ±.7 ±.35 Dimensional tolerance of width N ±.7 ±.35 Variation of height H.2.1 Variation of width N unning parallelism of block surface C to surface A See Table 2.65 unning parallelism of block surface D to surface B See Table 2.65 (3) Accuracy of running parallelism Table 2.65 Accuracy of unning Parallelism ail Length (mm) Accuracy (µm) H P SP UP ~ ~ ~ ~ ~ ~ ~ 1, ,1 ~ 1, ,5 ~ 1, ,9 ~ 2, ,5 ~ 3, ,1 ~ 3, ,6 ~ 4,

8 G99TE Preload A preload can be applied to each guideway using oversized rollers. Generally, a linear motion guideway has negative clearance between the raceway and rollers to improve stiffness and maintain high precision. The G series linear guideway offers three standard preloads for various applications and conditions. Table 2.62 Class Code Preload Condition Light Preload Medium Preload Heavy Preload Z.2C~.4C Certain load direction, low impact, low precision required ZA.7C~.9C High rigidity required, high precision required ZB.12C~.14C Super high rigidity required, with vibration and impact The figure shows the relationship between the rigidity, friction and nominal life. A preload no larger than ZA would be recommended for smaller model sizes to avoid over-preload affecting the life of the guideway. igidity Friction Z ZA ZB Life Lubrication (1) Grease Grease nipple M6x.75P NO G25 G3 G35 PT1/8 NO.3432 M4x.7P G15 G2 M6x.75P G25 G3 G35 M6x.75P NO NO.34318(OPTION) NO.3431B

9 74 G99TE14-13 Mounting location The standard location of the grease fitting is at both ends of the block, but the nipple can be mounted in the side or the top of block. For lateral installation, we recommend that the nipple be mounted at the non-reference side, otherwise please contact us. It is possible to carry out the lubrication by using an oil-piping joint. The figure shows the locations of the grease fitting. do O ing W Table 2.67 O-ing size and max. permissible depth for piercing O-ing Lube hole at top: max. permissible depth for do (mm) W (mm) piercing T max G ± ± dia..8 G 3 7.5± ± G ± ± Tmax G ± ± G ± ± G ± ± The oil amount for a block filled with grease Table 2.68 The oil amount for a block filled with grease Medium Load Heavy Load Medium Load Heavy Load (cm 3 ) (cm 3 ) (cm 3 ) (cm 3 ) G G G G HG G Frequency of replenishment Check the grease every 1 km, or every 3-6 months.

10 G99TE (2) Oil The recommended viscosity of oil is about 32~15cSt. If you need to use oil-type lubrication, please inform us, then the block will not be prelubricated before shipment. Types of oil piping joint LF-76 LF-78 M8x1.P M8x1.P 18 M8x1.P PT 1/8 PT 1/ M6x.75P NO.972A1 Ø8 G25 G3 G35 PT 1/8 NO.976A1 Ø1 LF PT 1/8 11 LF PT 1/8 M6x.75P Ø8 PT 1/8 Ø1 PT 1/ NO.974A1 NO.978A1 Ø G25 G3 G35 SF-76 SF-78 M8x1.P M6x.75P Ø8 NO.971A1 G25 G3 G35 NO.975A1 SF-86 SF M6x.75P Ø8 NO.973A1 G25 G3 G35 PT 1/8 Ø11 NO.977A1

11 76 G99TE14-13 Oil feeding rate Table 2.69 oil feed rate feed rate feed rate (cm 3 /hr) (cm 3 /hr) G G 45.3 G 3.2 G G G Dust Proof Accessories (1) Codes of accessories If the following accessories are needed, please add the code followed by the model number. Table 2.7 t2 End seal No symbol: Standard Protection (End seal + Bottom Seal) Bottom Seal Scraper End seal ZZ (End seal + Bottom Seal + Scraper) t1 End seal End seal Scraper KK (Double seals + Bottom Seal + Scraper) DD (Double seals + Bottom Seal)

12 G99TE (2) End seal and bottom seal To prevent life reduction caused by iron chips or dust entering the block. (3) Double seals Enhances the wiping effect, foreign matter can be completely wiped off. Table 2.71 Dimensions of end seal Thinkness (t1) Thinkness (t1) (mm) (mm) G 25 ES 2.2 G 45 ES 3.6 G 3 ES 2.4 G 55 ES 3.6 G 35 ES 2.5 G 65 ES 4.4 (4) Scraper The scraper removes high-temperature iron chips and larger foreign objects. Table 2.72 Dimensions of scraper Thinkness (t2) Thinkness (t2) (mm) (mm) G 25 SC 1. G 45 SC 1.5 G 3 SC 1.5 G 55 SC 1.5 G 35 SC 1.5 G 65 SC 1.5 (5) Bolt caps for rail mounting holes Caps are used to cover the mounting holes to prevent chips or other foreign objects from collecting in the holes. The caps will be enclosed in each rail package. Ø Table 2.73 Dimensions of Bolt Caps for ail Mounting Holes ail size Bolt size Diameter(D) Thickness(H) ail size Bolt size Diameter(D) Thickness(H) (mm) (mm) (mm) (mm) G25 M G45 M G3 M G55 M G35 M G65 M Friction The maximum value of resistance per end seal are as shown in the table. Table 2.74 Seal esistance esistance N (kgf) esistance N (kgf) G (.28) G (.43) G (.31) G (.52) G (.36) G (.68)

13 78 G99TE The Accuracy Tolerance of Mounting Surface (1) The accuracy tolerance of rail-mounting surface As long as the accuracy requirements of the mounting surfaces shown in the following tables are met, the high accuracy, high rigidity and long life of the G series linear guideway will be maintained without any difficulty. The parallelism tolerance of reference surface (P).1 C.1 Accuracy requirement for 所有滑軌承靠面要求 all rail-mounting reference surfaces S1 C a P Table 2.75 Max. Parallelism Tolerance (P) unit: µm Preload classes Light Preload (Z) Medium Preload (ZA) Heavy Preload (ZB) G G G G G G The accuracy tolerance of reference surface height (S1) S1 = a K S1 : Max. tolerance of height a : Distance between paired rails K : Coefficient of tolerance of height Table 2.76 Coefficient of tolerance of height Preload classes Light Preload (Z) Medium Preload (ZA) Heavy Preload (ZB) K

14 G99TE (2) The accuracy tolerance of block-mounting surface The tolerance of the height of reference surface when two or more pieces are used in parallel (S2) Accuracy requirement for.1 所有滑塊承靠面要求 all block-mounting reference surfaces S2 A b.1 A.1 A B.1 A.1 B S2 = b S2 : Max. tolerance of height b : Distance between paired blocks The tolerance of the height of reference surface when two or more pieces are used in parallel (S3) Accuracy requirement for.1 所有滑塊承靠面要求 all block-mounting reference surfaces S3 A c.1 A S3 = c S3 : Max. tolerance of height c : Distance between paired blocks

15 8 G99TE Cautions for Installation (1) Shoulder heights and fillets Improper shoulder heights and fillets of mounting surfaces will cause a deviation in accuracy and interference with the chamfered part of the rail or block. By following the recommended shoulder heights and fillets, accuracy problems in installation can be eliminated. r 2 r 2 Block ail E 2 H 1 E 1 r 1 r 1 Table 2.77 Max. radius of fillets Max. radius of fillets Shoulder height of the rail Shoulder height of the block Clearance under block r 1 (mm) r 2 (mm) E 1 (mm) E 2 (mm) H 1 (mm) G G G G G G (2) Tightening Torque of Mounting Bolts Improper tightening of mounting bolts will seriously influence the accuracy of a linear guideway. The following tightening torque for the different sizes of bolt is recommended. Table 2.78 Bolt size Torque N-cm (kgf-cm) G25 M6 1P 2L 1373 (14) G3 M8 1.25P 25L 341 (31) G35 M8 1.25P 25L 341 (31) G45 M P 35L (12) G55 M14 2P 45L (16) G65 M16 2P 5L 1962 (2)

16 G99TE Standard and Maximum Lengths of ail HIWIN offers a number of standard rail lengths. Standard rail lengths feature end mounting hole placements set to predetermined values (E). For non-standard rail lengths, be sure to specify the E-value to be no greater than 1/2 the pitch (P) dimension. An E-value greater than this will result in unstable rail ends. n n=(number ( 固定螺栓孔數 of ) rail mounting holes) E P E L Table 2.79 unit: mm Item G25 G3 G35 G45 G55 G65 22 (7) 28 (7) 28 (7) 57 (11) 78 (13) 1,27 (17) 28 (9) 44 (11) 44 (11) 885 (17) 12 (17) 1,57 (21) 34 (11) 6 (15) 6 (15) 1,2 (23) 1,26 (21) 2,2 (27) 46 (15) 76 (19) 76 (19) 1,62 (31) 1,5 (25) 2,62 (35) Standard Length L(n) 64 (21) 1, (25) 1, (25) 2,4 (39) 1,98 (33) - 82 (27) 1,64 (41) 1,64 (41) 2,46 (47) 2,58 (43) - 1, (33) 2,4 (51) 2,4 (51) 2,985 (57) 2,94 (49) - 1,24 (41) 2,52 (63) 2,52 (63) 3,9 (59) 3,6 (51) - 1,6 (53) 3, (75) 3, (75) Pitch (P) Distance to End (E s ) Max. Standard Length 4, (133) 3,96 (99) 3,96 (99) 3,93 (75) 3,9 (65) 3,97 (53) Max. Length 4, 4, 4, 4, 4, 4, Note : 1. Tolerance of E value for standard rail is.5~-.5 mm. Tolerance of E value for jointed rail is ~-.3 mm. 2. Maximum standard length means the max. rail length with standard E value on both sides. 3. If different E value is needed, please contact HIWIN.

17 82 G99TE Dimensions for G series (1) GH-CA / GH-HA K 1 6-Mxl C W G L B 1 B L 1 K 2 T H 2 ØD H 1 H H h H 3 N W Ød E P E M M P M Y Model No. Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of ail (mm) Mounting Bolt for ail Basic Dynamic Load ating Basic Static Load ating Static ated Moment M M P M Y Block Weight ail H H 1 N W B B 1 C L 1 L K 1 G Mxl T H 2 H 3 W H D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m kg kg/m GH 25CA M6x M6x2 GH 25HA GH 3CA M8x M8x25 GH 3HA GH 35CA M8x M8x25 GH 35HA GH 45CA M1x M12x35 GH 45HA GH 55CA M12x M14x45 GH 55HA GH 65CA M16x M16x5 GH 65HA Note : 1 kgf = 9.81 N

18 G99TE (2) GW-CC / GW-HC K 1 6-M C 1 C W G L B1 B H2 ØD L 1 K 2 H1 H H h T1 T H 3 N W E Ød P E M M P M Y Model No Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of ail (mm) Mounting Bolt for ail Basic Dynamic Load ating Basic Static Load ating Static ated Moment M M P M Y Weight Block ail H H 1 N W B B 1 C C 1 L 1 L K 1 G M T T 1 H 2 H 3 W H D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m kg kg/m GW 25CC M M6x2 GW 25HC GW 3CC M M8x25 GW 3HC GW 35CC M M8x25 GW 35HC GW 45CC M M12x35 GW 45HC GW 55CC M M14x45 GW 55HC GW 65CC M M16x GW 65HC Note : 1 kgf = 9.81 N

19 84 G99TE14-13 (3) Dimensions for G-T (ail Mounting from Bottom) h H W S E P L E Model No. Dimensions of ail (mm) Weight W H S h P E (kg/m) G25T M6 1p G3T M8 1.25p G35T M8 1.25p G45T M p G55T M14 2p G65T M2 2.5p

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