Model Number Coding The model number confi guration for ball screws differs depending on the type. Table1 Refer to the corresponding configuration example shown in Table3. THK can also provide shaft end shapes matched to support units. These can also be denoted in the s, which should be used for this purpose. Precision ball screw types and sample model number configurations Table1 Precision SBN-V, SBK, SDA-V, HBN, SBKH, BIF-V, BNFN-V/BNFN, MDK, MBF, BNF-V/BNF, DIK, DKN, BLW, DK, MDK, WHF, BLK, WGF, BNT Unfi nished Shaft Ends A MBF, MDK, BNF, BIF Fixed Side : H, J Unfi nished Shaft Ends B BNF, BIF Finished Shaft Ends BNK Y 3 Rotary BLR, DIR Fixed Side : H, J /Spline BNS-A, BNS, NS-A, NS 5 Rolled ball screw types and sample model number configurations Rolled Unfi nished Shaft Ends MTF Table2 1 2 4 Ball screw nut and screw shaft combination JPF, BTK-V, MTF, WHF, BLK, Fixed Side : H, J 7 products WTF, CNF, BNT Rotary BLR 8 Standalone screw shafts Standalone ball screw nuts TS BTK-V, BLK, WTF, CNF, BNT, BLR 6 9 Support unit, nut bracket and lock nut types and sample model number configurations Table3 Support Unit EK, BK, FK, EF, BF, FF Nut brackets for BNK MC Lock Nut RN 10
1 Precision Models SBN-V, SBK, SDA-V, HBN, SBKH, BIF-V, BNFN-V/BNFN, MDK, MBF, BNF-V/ BNF, DIK, DKN, BLW, DK, MDK, WHF, BLK, WGF and BNT BIF 25 05 L -5 RR G0 + 620L C5 - H1K - G Direction of nut flange orientation No : faces fixed side G: faces supported side (Note) Recommended Shaft Ends Shapes (*1) H, J: fixed side K: supported side Accuracy Symbol for clearance in the axial direction No. of circuits (Rows turns) Threading direction No : right-hand thread L: left-hand thread RL: Right and left hand thread Lead Screw shaft outer diameter Overall screw shaft length No : without seal RR: labyrinth seal on both ends(*2) (*1) See to. (*2) See. Note) The ball nut flange faces the fixed side unless otherwise specifi ed. If desiring the fl ange to face the supported side, add G in the end of the model number when placing an order. 2 Precision Unfinished Shaft Ends Models BIF, MDK, MBF and BNF BIF2505-5RRG0+720LC5A Unfinished shaft ends code (A or B) Refer to for the corresponding model number.
3 Precision Finished Shaft Ends Model BNK BNK2020-5+620LC5Y Finished shaft ends code Refer to for the corresponding model number. 4 Rotary Models BLR and DIR BLR2020-3.6 K UU G1 +1000L C5 Flange orientation Symbol for clearance in the axial direction Symbol for support bearing seal Accuracy Overall screw shaft length 5 /Spline Models BNS-A, BNS, NS-A and NS BNS2525 +600L Overall shaft length 6 Rolled Unfinished Shaft Ends Model MTF MTF 08 02 +250L C7 T - H1 Screw shaft outer diameter Overall shaft length Lead Recommended Shaft Ends Shapes (See onward) Symbol for ball screw shaft Accuracy (No for Normal Grade)
7 Rolled Models BTK-V, MTF, WHF, BLK, WTF, CNF and BNT(Rolled) Combination of the Nut and the Screw Shaft BTK1405V-2.6 ZZ +500L C7 T - H1K Recommended Shaft Ends Shapes (See onward) Symbol for rolled shaft Accuracy (see A ) (no for class C10) Overall screw shaft length ZZ: brush seal attached to both ends of the ball screw nut (see ) 8 Rolled Model JPF Rolled model JPF JPF1404-4 RR G0 +500L C7 T Symbol for rolled shaft Accuracy (see A ) (no for class C10) Overall screw shaft length Axial clearance RR: Labyrinth seal attached to both ends of the ball screw nut (see ) 9 Rolled Rotary Model BLR (Rolled) BLR2020-3.6 K UU +1000L C7 T Flange orientation Overall screw shaft length Symbol for support bearing seal Accuracy Symbol for rolled Note) For clearance in the axial direction, see A.
10 Standalone rolled shafts/nuts Models BTK-V, BLK/WTF, CNF, BNT(Rolled), BLR(Rolled) and TS Rolled shaft only TS 14 05 +500L C7 Lead Screw shaft outer diameter Symbol for rolled ball screw shaft Accuracy (see page A ) (no for class C10) Overall screw shaft length Nut only BTK1405V-2.6 ZZ ZZ: brush seal attached to both ends of the ball screw nut (see ) 11 Support units, nut brackets and lock nuts Models EK, BK, FK, EF, BF, FF, MC and RN EK12 12 Ball screw options, W wiper rings and QZ lubricators BIF2505V-5 QZ WW G0 +1000L C5 With QZ Lubricator With wiper ring W (*) See. Notes on Ordering Options The details of the product options differ according to the model number. Check before ordering. See. Other notes on specifications Contact THK separately for information on the specifi cations below. (for recommended shaft end shapes, indicate the ). Surface Treatment (see B ) Grease used Nipple mounting