Support Unit Document: Types, Specifications, and Installation of Ball Screw Peripherals, Study notes of Life Sciences

Download Support Unit Document: Types, Specifications, and Installation of Ball Screw Peripherals and more Study notes Life Sciences in PDF only on Docsity! A15-272 Support Unit Models EK, BK, FK, EF, BF and FF Fixed side Supported side Bearing Housing Snap ring Bearing Collar Housing Lock nut Set piece Hexagonal socket-head setscrew Holding lid Seal Fig.1 Structure of the Support Unit Structure and Features The support unit comes in six types: models EK, FK, EF, and FF, which are tailored to model BNK precision ball screw with fi nished shaft ends, and models BK and BF, which are standardized for general ball screws. The support unit on the fi xed side includes a JIS Class 5-compliant angular bearing provided with an adjusted preload. The Support Unit on the supported side uses a deep-groove ball bearing. The internal bearings of the Support Unit models EK, FK and BK contain an appropriate amount of lithium soap-group grease that is sealed with a special seal. Thus, these models are capable of op- erating over a long period. BallScrew_CD.indb 272 2021/08/03 18:35:07 513-2E A15-273 B all Screw Peripherals Support Unit [Uses the Optimal Bearing] To ensure the rigidity balance with the Ball Screw, the Support Unit uses an angular bearing (contact angle: 30; DF confi guration) with a high rigidity and a low torque. Miniature Support Unit models EK/FK 4, 5 and 6 are incorporated with a miniature angular bearing with a contact angle of 45 de- veloped exclusively for miniature Ball Screws. This bearing has a greater contact angle of 45 and an increased number of balls with a smaller diameter. The high rigidity and accuracy of the miniature angular bearing provides the stable rotational performance. [Support Unit Shapes] The square and round shapes are available for the Support Unit to allow the selection according to the intended use. Example of Installation Square Type Round Type [Compact and Easy Installation] The Support Unit is compactly designed to accommodate the space in the installation site. As the bearing is provided with an appropriately adjusted preload, the Support Unit can be assembled with a Ball Screw unit with no further machining. Accordingly, the required man-hours in the assembly can be reduced and the assembly accuracy can be increased. BallScrew_CD.indb 273 2021/08/03 18:35:07 513-2E A15-276 Model Numbers of Bearings and Characteristic Values Angular ball bearing on the fi xed side Deep-groove ball bearing on the supported side Support Unit model No. Bearing Axial direction Support Unit model No. Bearing model No. Radial direction Basic dynamic load rating Ca (kN) Note) Permis- sible load (kN) Rigidity (N/m) Basic dynamic load rating C(kN) Basic static load rating C 0 (kN) EK 4 FK 4 AC4-12 (DF P5) 0.93 1.1 27 — — — — EK 5 FK 5 AC5-14 (DF P5) 1 1.24 29 — — — — EK 6 FK 6 AC6-16 (DF P5) 1.38 1.76 35 EF 6 FF 6 606ZZ 2.19 0.87 EK 8 FK 8 79M8A (DF P5) 2.93 2.15 49 EF 8 606ZZ 2.19 0.87 EK 10 FK 10 BK 10 7000 equivalent (DF P5) 6.08 3.1 65 EF 10 FF 10 BF 10 608ZZ 3.35 1.4 EK 12 FK 12 BK 12 7001 equivalent (DF P5) 6.66 3.25 88 EF 12 FF 12 BF 12 6000ZZ 4.55 1.96 EK 15 FK 15 BK 15 7002 equivalent (DF P5) 7.6 4 100 EF 15 FF 15 BF 15 6002ZZ 5.6 2.84 BK 17 7203 equivalent (DF P5) 13.7 5.85 125 BF 17 6203ZZ 9.6 4.6 EK 20 FK 20 7204 equivalent (DF P5) 17.9 9.5 170 EF 20 FF 20 6204ZZ 12.8 6.65 BK 20 7004 equivalent (DF P5) 12.7 7.55 140 BF 20 6004ZZ 9.4 5.05 FK 25 BK 25 7205 equivalent (DF P5) 20.2 11.5 190 FF 25 BF 25 6205ZZ 14 7.85 FK 30 BK 30 7206 equivalent (DF P5) 28 16.3 195 FF 30 BF 30 6206ZZ 19.5 11.3 BK 35 7207 equivalent (DF P5) 37.2 21.9 255 BF 35 6207ZZ 25.7 15.3 BK 40 7208 equivalent (DF P5) 44.1 27.1 270 BF 40 6208ZZ 29.1 17.8 Note) “Permissible load” indicates the static permissible load. BallScrew_CD.indb 276 2021/08/03 18:35:08 513-2E A15-277 B all Screw Peripherals Support Unit Example of Installation [Square Type Support Unit] Fig.2 Example of Installing a Square Type Support Unit [Round Type Support Unit] Fig.3 Example of Installing a Round Type Support Unit BallScrew_CD.indb 277 2021/08/03 18:35:08 513-2E A15-278 Mounting Procedure [Installing the Support Unit] (1) Install the fi xed side Support Unit with the screw shaft. (2) After inserting the fi xed side Support Unit, secure the lock nut using the fastening set piece and the hexagonal socket-head setscrews. (3) Attach the supported side bearing to the screw shaft and secure the bearing using the snap ring, and then install the assembly to the housing on the supported side. Note1) Do no disassemble the Support Unit. Note2) When inserting the screw shaft to the Support Unit, take care not to let the oil seal lip turn outward. Note3) When securing the set piece with a hexagonal socket-head setscrew, apply an adhesive to the hexagonal socket- head setscrew before tightening it in order to prevent the screw from loosening. If planning to use the product in a harsh environment, it is also necessary to take a measure to prevent other components/parts from loosening. Contact THK for details. Supported side Bearing Snap ring Fixed side Collar Set piece Hexagonal socket-head setscrew Lock nut [Installation onto the Table and the Base] (1) If using a bracket when mounting the ball screw nut to the table, insert the nut into the bracket and temporarily fasten it. (2) Temporarily fasten the fi xed side Support Unit to the base. In doing so, press the table toward the fi xed side Support Unit to align the axial center, and ad- just the table so that it can travel freely. ● If using the fi xed side Support Unit as the reference point, secure a clearance between the ball screw nut and the table or inside the bracket when making adjustment. ● If using the table as the reference point, make the adjustment either by using the shim (for a square type Support Unit), or securing the clearance between the outer surface of the nut and the inner surface of the mounting section (for a round type Support Unit). (3) Press the table toward the fi xed-side Support Unit to align the axial center. Make the adjustment by reciprocating the table several times so that the nut travels smoothly throughout the whole stroke, and temporarily secure the Support Unit to the base. Base Fixed side support unit Bracket Table Supported side support unit BallScrew_CD.indb 278 2021/08/03 18:35:08 513-2E A15-281 B all Screw Peripherals Support Unit BallScrew_CD.indb 281 2021/08/03 18:35:08 513-2E A15-282 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com EK Square Type Support Unit on the Fixed Side 2-φ d1 through hole, φ d2 counter bore depth h 2-φ d1 through hole Models EK 4 and 5 Models EK 6 and 8 b H1 h1 H M P B1 B φ d L L3 （L2） L1 3 5 2 4 □T 1 7 6 Model No. Shaft diameter d L L 1 L 2 L 3 B H b 0.02 EK 4 4 15 5.5 17.5 3 34 19 17 EK 5 5 16.5 5.5 18.5 3.5 36 21 18 EK 6 6 20 5.5 22 3.5 42 25 21 EK 8 8 23 7 26 4 52 32 26 EK 10 10 24 6 29.5 6 70 43 35 EK 12 12 24 6 29.5 6 70 43 35 EK 15 15 25 6 36 5 80 49 40 EK 20 20 42 10 50 10 95 58 47.5 Models EK 4 to 8 Part No. Part name No. of units 1 Housing 1 2 Bearing 1 set 3 Set nut 1 4 Collar 2 5 Seal 1 6 Lock Nut 1 7 Hexagonal socket-head setscrew (with a set piece) 1 BallScrew_CD.indb 282 2021/08/03 18:35:08 513-2E A15-283 B all Screw Peripherals Support Unit 2-φ d1 through hole Models EK 10 to 20 （L2） L3 φ d L1 L □T b H1 h1 H M P B1 B 5 2 4 3 6 7 1 Unit: mm Bearing used Mass h 1 0.02 B 1 H 1 P d 1 d 2 h M T kg 10 18 7 26 4.5 — — M2.6 10 AC4-12(DF P5) 0.06 11 20 8 28 4.5 — — M2.6 11 AC5-14(DF P5) 0.08 13 18 20 30 5.5 9.5 11 M3 12 AC6-16(DF P5) 0.14 17 25 26 38 6.6 11 12 M3 14 79M8A(DF P5) 0.24 25 36 24 52 9 — — M3 16 7000 equivalent (DF P5) 0.46 25 36 24 52 9 — — M3 19 7001 equivalent (DF P5) 0.44 30 41 25 60 11 — — M3 22 7002 equivalent (DF P5) 0.55 30 56 25 75 11 — — M4 30 7204 equivalent (DF P5) 1.35 Models EK 10 to 20 Part No. Part name No. of units 1 Housing 1 2 Bearing 1 set 3 Holding lid 1 4 Collar 2 5 Seal 2 6 Lock Nut 1 7 Hexagonal socket-head setscrew (with a set piece) 1 BallScrew_CD.indb 283 2021/08/03 18:35:09 513-2E A15-286 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com FK Round Type Support Unit on the Fixed Side Mounting method A Models FK 4 to 8 (90° equidistant) 4-φ d1 through hole, φ d2 counter bore depth h L F H φ APCD E R0.6MAX φ dφ Dg6 T1 （L1） M □B □T 1 5 2 4 6 3 7 Model No. Shaft diameter d L H F E D A PCD B FK 4 4 15 6 9 17.5 18 –0.006 –0.017 32 24 25 FK 5 5 16.5 6 10.5 18.5 20 –0.007 –0.02 34 26 26 FK 6 6 20 7 13 22 22 –0.007 –0.02 36 28 28 FK 8 8 23 9 14 26 28 –0.007 –0.02 43 35 35 Note) When using a Model BNK fi nished shaft end precision ball screw, use mounting method A only. BallScrew_CD.indb 286 2021/08/03 18:35:09 513-2E A15-287 B all Screw Peripherals Support Unit Mounting method B φ d L F H E T2 （L2） Unit: mm Installation procedure A Installation procedure B Bearing used Mass L 1 T 1 L 2 T 2 d 1 d 2 h M T kg 5.5 3 6.5 4 3.4 6.5 4 M2.6 10 AC4-12(DF P5) 0.05 5.5 3.5 7 5 3.4 6.5 4 M2.6 11 AC5-14(DF P5) 0.06 5.5 3.5 8.5 6.5 3.4 6.5 4 M3 12 AC6-16(DF P5) 0.08 7 4 10 7 3.4 6.5 4 M3 14 79M8A(DF P5) 0.15 Part No. Part name No. of units 1 Housing 1 2 Bearing 1 set 3 Set nut 1 4 Collar 2 5 Seal 1 6 Lock Nut 1 7 Hexagonal socket-head setscrew (with a set piece) 1 BallScrew_CD.indb 287 2021/08/03 18:35:09 513-2E A15-288 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com FK Round Type Support Unit on the Fixed Side Mounting method A (90° equidistant) Models FK 10 to 30 4-φ d1 through hole, φ d2 counter bore depth h L F H （L1） 5 2 4 6 3 7 φ APCD φ dφ Dg6 E R0.6MAX T1 1 □B □T M Model No. Shaft diameter d L H F E D A PCD B FK 10 10 27 10 17 29.5 34 –0.009 –0.025 52 42 42 FK 12 12 27 10 17 29.5 36 –0.009 –0.025 54 44 44 FK 15 15 32 15 17 36 40 –0.009 –0.025 63 50 52 FK 20 20 52 22 30 50 57 –0.01 –0.029 85 70 68 FK 25 25 57 27 30 60 63 –0.01 –0.029 98 80 79 FK 30 30 62 30 32 61 75 –0.01 –0.029 117 95 93 BallScrew_CD.indb 288 2021/08/03 18:35:09 513-2E A15-291 B all Screw Peripherals Support Unit Part No. Part name No. of units 1 Housing 1 2 Bearing 1 3 Snap ring 1 2-φ d1 through hole Models EF 10 to 20 b P H1 h1 H B1 B L 2 φ d 3 1 THK EF* Unit: mm Bearing used Snap ring size Mass H 1 P d 1 d 2 h kg 20 30 5.5 9.5 11 606ZZ C6 0.07 26 38 6.6 11 12 606ZZ C6 0.13 24 52 9 — — 608ZZ C8 0.33 24 52 9 — — 6000ZZ C10 0.32 25 60 9 — — 6002ZZ C15 0.38 25 75 11 — — 6204ZZ C20 0.63 BallScrew_CD.indb 291 2021/08/03 18:35:10 513-2E A15-292 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com BF Square Type Support Unit on the Supported Side 2-φ d1 through hole, φ d2 counter bore depth h b H1 h1 H P B1 B THK BF* Model No. Shaft diameter d L B H b 0.02 h 1 0.02 B 1 H 1 BF 10 8 20 60 39 30 22 34 32.5 BF 12 10 20 60 43 30 25 35 32.5 BF 15 15 20 70 48 35 28 40 38 BF 17 17 23 86 64 43 39 50 55 BF 20 20 26 88 60 44 34 52 50 BF 25 25 30 106 80 53 48 64 70 BF 30 30 32 128 89 64 51 76 78 BF 35 35 32 140 96 70 52 88 79 BF 40 40 37 160 110 80 60 100 90 Note) The area marked with “*” is imprinted with a numeric character(s) as part of the model number. BallScrew_CD.indb 292 2021/08/03 18:35:10 513-2E A15-293 B all Screw Peripherals Support Unit Part No. Part name No. of units 1 Housing 1 2 Bearing 1 3 Snap ring 1 L 3 φ d 2 1 Unit: mm Bearing used Snap ring used Mass P d 1 d 2 h kg 46 6.6 10.8 5 608ZZ C8 0.29 46 6.6 10.8 1.5 6000ZZ C10 0.3 54 6.6 11 6.5 6002ZZ C15 0.38 68 9 14 8.5 6203ZZ C17 0.74 70 9 14 8.5 6004ZZ C20 0.76 85 11 17.5 11 6205ZZ C25 1.42 102 14 20 13 6206ZZ C30 1.97 114 14 20 13 6207ZZ C35 2.22 130 18 26 17.5 6208ZZ C40 3.27 BallScrew_CD.indb 293 2021/08/03 18:35:10 513-2E A15-296 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com Recommended Shapes of Shaft Ends - Shape H (H1, H2 and H3) (For Support Unit Models FK and EK) Model EK Model FK Model FK K1 K2 K3 Support Unit model No. Ball screw shaft outer diameter Shaft outer diameter of the bearung Metric screw thread Model FK Model EK d A B E F M S FK4 EK4 6 4 3 23 5 M4×0.5 7 FK5 EK5 8 5 4 25 6 M5×0.5 7 FK6 EK6 10 *1 6 4 30 8 M6×0.75 8 FK8 EK8 12 8 6 35 9 M8×1 10 FK10 EK10 14 10 8 36 15 M10×1 11 FK10 EK10 15 10 8 36 15 M10×1 11 FK12 EK12 16 12 10 36 15 M12×1 11 FK12 EK12 18 12 10 36 15 M12×1 11 FK15 EK15 20 15 12 49 20 M15×1 13 FK15 EK15 25 15 12 49 20 M15×1 13 FK20 EK20 28 20 17 64 25 M20×1 17 FK20 EK20 30 20 17 64 25 M20×1 17 FK20 EK20 32 20 17 64 25 M20×1 17 FK25 — 36 25 20 76 30 M25×1.5 20 FK30 — 40 30 25 72 38 M30×1.5 25 Note) Support Units are designed to have dimensions so that combinations of models FK and FF, models EK and EF or models BK and BF are used on the same shaft. If desiring the shaft end to be machined at THK, add the shape symbol in the end of the Ball Screw model number. (Example) TS2505+500L-H2K (Shape H2 on the fi xed side; shape K on the supported side) For the permissible radial runout of the shaft bearing end face, refer to JIS B 1192 (ISO 3408). *1 FK6 and EK6 also support 8 mm outer diameter ball screws. Contact THK for details. BallScrew_CD.indb 296 2021/08/03 18:35:11 513-2E A15-297 B all Screw Peripherals Support Unit Shape H1 Shape H2 Shape H3 Width G, depth T (Metric screw thread) S P R J P F E N H M φ B h7 φ A h7 φ d Unit: mm Width across fl at Shape H2 Shape H3 Support Unit position Keyway Cut fl at on two side Model FK Model EK J N H G N9 T +0.1 0 P R P K 1 K 2 K 3 4 4 4 — — — 2.7 4 1.5 0.5 1.5 5 4 4 — — — 3.7 5 2 0.5 2 5 4 4 — — — 3.7 6 3.5 0.5 3.5 8 5 5 — — — 5.6 7 3.5 0.5 3.5 10 5 7 2 1.2 11 7.5 11 0.5 –0.5 –0.5 10 5 7 2 1.2 11 7.5 11 0.5 –0.5 –0.5 13 6 8 3 1.8 12 9.5 12 0.5 –0.5 –0.5 13 6 8 3 1.8 12 9.5 12 0.5 –0.5 –0.5 16 6 9 4 2.5 16 11.3 16 4 2 5 18 7 10 4 2.5 16 11.3 16 4 2 5 21 8 11 5 3 21 16 21 1 –3 1 24 8 12 5 3 21 16 21 1 –3 1 27 9 13 5 3 21 16 21 1 –3 1 27 10 13 6 3.5 25 19 25 5 –2 — 32 10 15 8 4 32 23.5 32 –3 –9 — Note) The ball nut fl ange faces the fi xed side unless otherwise specifi ed. If desiring the fl ange to face the supported side, add symbol G in the end of the Ball Screw model number when placing an order. (Example) BIF2505-5RRGO+420LC5-H2KG BallScrew_CD.indb 297 2021/08/03 18:35:11 513-2E A15-298 Download data by searching for the corresponding model number on the Technical Support site. https://tech.thk.com Recommended Shapes of Shaft Ends - Shape J (J1, J2 and J3) (For Support Unit Model BK) Model BK Support Unit model No. Ball screw shaft outer diameter Shaft outer diameter of the bearung Metric screw thread Model BK d A B E F M BK10 14 10 8 39 15 M10×1 BK10 15 10 8 39 15 M10×1 BK12 16 12 10 39 15 M12×1 BK12 18 12 10 39 15 M12×1 BK15 20 15 12 40 20 M15×1 BK17 25 17 15 53 23 M17×1 BK20 28 20 17 53 25 M20×1 BK20 30 20 17 53 25 M20×1 BK20 32 20 17 53 25 M20×1 BK25 36 25 20 65 30 M25×1.5 BK30 40 30 25 72 38 M30×1.5 BK35 45 35 30 83 45 M35×1.5 BK40 50 40 35 98 50 M40×1.5 BK40 55 40 35 98 50 M40×1.5 Note) Support Units are designed to have dimensions so that combinations of models FK and FF, models EK and EF or models BK and BF are used on the same shaft. If desiring the shaft end to be machined at THK, add the shape symbol in the end of the Ball Screw model number. (Example) TS2505+500L-J2K (Shape J2 on the fi xed side; shape K on the supported side) For the permissible radial runout of the shaft bearing end face, refer to JIS B 1192 (ISO 3408). BallScrew_CD.indb 298 2021/08/03 18:35:11 513-2E