BNK Set

Finished Shaft Ends
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To meet the space-saving requirement, this type of Ball Screw has a standardized screw shaft and a ball screw nut. The ends of the screw shaft are standardized to fit the corresponding support unit.
View specifications and model number coding
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Shaft O.D. (mm)
Lead (mm)
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    • Ball screw specification
      Screw shaft diameter (mm) 15
      Lead (mm) 10
      BCD (mm) 15.75
      Thread minor diameter (mm) 12.5
      Number of circuits 2×2.8
      Axial clearance 0
      Basic dynamic load rating Ca (kN) 9
      Basic dynamic load rating C0a (kN) 13.9
      Preload torque (N-m) 0.02 to 0.098
      Spacer ball 1:1
      Rigidity (N/µm) 190
      Circulation method End Cap
      Applicable fixed side support unit EK12, FK12
      Applicable support side support unit EF12, FF12
      Applicable nut bracket MC1408
      Model No. Stroke Screw shaft length Ball screw specifications Lead angle accuracy
      L1 L2 L3 Runout of the screw shaft axis
      D
      Runout of the nut circumference
      H
      Flange perpen-dicularity
      I
      Runout of the thread groove sruface
      J
      Representative travel distance error Fluctuation
      mm mm mm mm mm mm mm mm mm mm
      BNK1510-5.6G0+321LC5Y 150 239 254 321 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1510-5.6G0+371LC5Y 200 289 304 371 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1510-5.6G0+421LC5Y 250 339 354 421 0.035 0.015 0.011 0.012 ±0.025 0.02
      BNK1510-5.6G0+471LC5Y 300 389 404 471 0.035 0.015 0.011 0.012 ±0.025 0.02
      BNK1510-5.6G0+521LC5Y 350 439 454 521 0.035 0.015 0.011 0.012 ±0.027 0.02
      BNK1510-5.6G0+571LC5Y 400 489 504 571 0.035 0.015 0.011 0.012 ±0.027 0.02
      BNK1510-5.6G0+621LC5Y 450 539 554 621 0.035 0.015 0.011 0.012 ±0.03 0.023
      BNK1510-5.6G0+671LC5Y 500 589 604 671 0.035 0.015 0.011 0.012 ±0.03 0.023
      BNK1510-5.6G0+721LC5Y 550 639 654 721 0.035 0.015 0.011 0.012 ±0.035 0.025
      BNK1510-5.6G0+771LC5Y 600 689 704 771 0.035 0.015 0.011 0.012 ±0.035 0.025
      BNK1510-5.6G0+871LC5Y 700 789 804 871 0.035 0.015 0.011 0.012 ±0.035 0.025
      BNK1510-5.6G0+971LC5Y 800 889 904 971 0.035 0.015 0.011 0.012 ±0.04 0.027
      AFB-LF is the default grease. For more detailed specifications, please download the Product Catalog with the link in the Downloads section on this page.
    • Ball screw specification
      Screw shaft diameter (mm) 15
      Lead (mm) 20
      BCD (mm) 15.75
      Thread minor diameter (mm) 12.5
      Number of circuits 2×1.5
      Axial clearance 0
      Basic dynamic load rating Ca (kN) 5.1
      Basic dynamic load rating C0a (kN) 7.9
      Preload torque (N-m) 0.02 to 0.088
      Spacer ball 1:1
      Rigidity (N/µm) 110
      Circulation method End Cap
      Applicable fixed side support unit EK12, FK12
      Applicable support side support unit EF12, FF12
      Applicable nut bracket MC1408
      Model No. Stroke Screw shaft length Ball screw specifications Lead angle accuracy
      L1 L2 L3 Runout of the screw shaft axis
      D
      Runout of the nut circumference
      H
      Flange perpen-dicularity
      I
      Runout of the thread groove sruface
      J
      Representative travel distance error Fluctuation
      mm mm mm mm mm mm mm mm mm mm
      BNK1520‑3G0+321LC5Y 150 236 254 321 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1520‑3G0+371LC5Y 200 286 304 371 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1520‑3G0+421LC5Y 250 336 354 421 0.04 0.015 0.011 0.012 ±0.025 0.02
      BNK1520‑3G0+471LC5Y 300 386 404 471 0.04 0.015 0.011 0.012 ±0.025 0.02
      BNK1520‑3G0+521LC5Y 350 436 454 521 0.05 0.015 0.011 0.012 ±0.027 0.02
      BNK1520‑3G0+571LC5Y 400 486 504 571 0.05 0.015 0.011 0.012 ±0.027 0.02
      BNK1520‑3G0+621LC5Y 450 536 554 621 0.05 0.015 0.011 0.012 ±0.03 0.023
      BNK1520‑3G0+671LC5Y 500 586 604 671 0.065 0.015 0.011 0.012 ±0.03 0.023
      BNK1520‑3G0+721LC5Y 550 636 654 721 0.065 0.015 0.011 0.012 ±0.035 0.025
      BNK1520‑3G0+771LC5Y 600 686 704 771 0.065 0.015 0.011 0.012 ±0.035 0.025
      BNK1520‑3G0+871LC5Y 700 786 804 871 0.085 0.015 0.011 0.012 ±0.035 0.025
      BNK1520‑3G0+971LC5Y 800 886 904 971 0.085 0.015 0.011 0.012 ±0.04 0.027
      AFB-LF is the default grease. For more detailed specifications, please download the Product Catalog with the link in the Downloads section on this page.
    • Ball screw specification
      Screw shaft diameter (mm) 16
      Lead (mm) 16
      BCD (mm) 16.65
      Thread minor diameter (mm) 13.7
      Number of circuits 2×1.8
      Axial clearance 0
      Basic dynamic load rating Ca (kN) 4.4
      Basic dynamic load rating C0a (kN) 7.2
      Preload torque (N-m) 0.02 to 0.098
      Spacer ball 1:1
      Rigidity (N/µm) 120
      Circulation method End Cap
      Applicable fixed side support unit EK12, FK12
      Applicable support side support unit EF12, FF12
      Applicable nut bracket MC1408
      Model No. Stroke Screw shaft length Ball screw specifications Lead angle accuracy
      L1 L2 L3 Runout of the screw shaft axis
      D
      Runout of the nut circumference
      H
      Flange perpen-dicularity
      I
      Runout of the thread groove sruface
      J
      Representative travel distance error Fluctuation
      mm mm mm mm mm mm mm mm mm mm
      BNK1616-3.6G0+321LC5Y 150 234 254 321 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1616-3.6G0+371LC5Y 200 284 304 371 0.035 0.015 0.011 0.012 ±0.023 0.018
      BNK1616-3.6G0+421LC5Y 250 334 354 421 0.04 0.015 0.011 0.012 ±0.025 0.02
      BNK1616-3.6G0+471LC5Y 300 384 404 471 0.04 0.015 0.011 0.012 ±0.025 0.02
      BNK1616-3.6G0+521LC5Y 350 434 454 521 0.05 0.015 0.011 0.012 ±0.027 0.02
      BNK1616-3.6G0+571LC5Y 400 484 504 571 0.05 0.015 0.011 0.012 ±0.027 0.02
      BNK1616-3.6G0+621LC5Y 450 534 554 621 0.05 0.015 0.011 0.012 ±0.03 0.023
      BNK1616-3.6G0+671LC5Y 500 584 604 671 0.065 0.015 0.011 0.012 ±0.03 0.023
      BNK1616-3.6G0+721LC5Y 550 634 654 721 0.065 0.015 0.011 0.012 ±0.035 0.025
      BNK1616-3.6G0+771LC5Y 600 684 704 771 0.065 0.015 0.011 0.012 ±0.035 0.025
      BNK1616-3.6G0+871LC5Y 700 784 804 871 0.085 0.015 0.011 0.012 ±0.035 0.025
      BNK1616-3.6G0+971LC5Y 800 884 904 971 0.085 0.015 0.011 0.012 ±0.04 0.027
      AFB-LF is the default grease. For more detailed specifications, please download the Product Catalog with the link in the Downloads section on this page.
    • Ball screw specification
      Screw shaft diameter (mm) 20
      Lead (mm) 10
      BCD (mm) 21
      Thread minor diameter (mm) 16.4
      Number of circuits 1×2.5
      Axial clearance 0
      Basic dynamic load rating Ca (kN) 7
      Basic dynamic load rating C0a (kN) 11
      Preload torque (N-m) 0.02 to 0.098
      Spacer ball 1:1
      Rigidity (N/µm) 110
      Circulation method Return Pipe
      Applicable fixed side support unit EK15, FK15
      Applicable support side support unit EF15, FF15
      Applicable nut bracket MC2010
      Model No. Stroke Screw shaft length Ball screw specifications Lead angle accuracy
      L1 L2 L3 Runout of the screw shaft axis
      D
      Runout of the nut circumference
      H
      Flange perpen-dicularity
      I
      Runout of the thread groove sruface
      J
      Representative travel distance error Fluctuation
      mm mm mm mm mm mm mm mm mm mm
      BNK2010-2.5RRG0+499LC5Y 300 389 414 499 0.04 0.015 0.011 0.012 ±0.025 0.02
      BNK2010-2.5RRG0+599LC5Y 400 489 514 599 0.04 0.015 0.011 0.012 ±0.027 0.02
      BNK2010-2.5RRG0+699LC5Y 500 589 614 699 0.04 0.015 0.011 0.012 ±0.03 0.023
      BNK2010-2.5RRG0+799LC5Y 600 689 714 799 0.04 0.015 0.011 0.012 ±0.035 0.025
      BNK2010-2.5RRG0+899LC5Y 700 789 814 899 0.04 0.015 0.011 0.012 ±0.035 0.025
      BNK2010-2.5RRG0+999LC5Y 800 889 914 999 0.04 0.015 0.011 0.012 ±0.04 0.027
      BNK2010-2.5RRG0+1099LC5Y 900 989 1014 1099 0.04 0.015 0.011 0.012 ±0.04 0.027
      BNK2010-2.5RRG0+1199LC5Y 1000 1089 1114 1199 0.04 0.015 0.011 0.012 ±0.046 0.03
      BNK2010-2.5RRG0+1299LC5Y 1100 1189 1214 1299 0.04 0.015 0.011 0.012 ±0.046 0.03
      BNK2020-3.6G0+520LC5Y 300 410 435 520 0.05 0.015 0.011 0.012 ±0.027 0.02
      BNK2020-3.6G0+620LC5Y 400 510 535 620 0.05 0.015 0.011 0.012 ±0.03 0.023
      BNK2020-3.6G0+720LC5Y 500 610 635 720 0.05 0.015 0.011 0.012 ±0.03 0.023
      BNK2020-3.6G0+820LC5Y 600 710 735 820 0.05 0.015 0.011 0.012 ±0.035 0.025
      BNK2020-3.6G0+920LC5Y 700 810 835 920 0.05 0.015 0.011 0.012 ±0.04 0.027
      BNK2020-3.6G0+1020LC5Y 800 910 935 1020 0.05 0.015 0.011 0.012 ±0.04 0.027
      BNK2020-3.6G0+1120LC5Y 900 1010 1035 1120 0.05 0.015 0.011 0.012 ±0.046 0.03
      BNK2020-3.6G0+1220LC5Y 1000 1110 1135 1220 0.05 0.015 0.011 0.012 ±0.046 0.03
      BNK2020-3.6G0+1320LC5Y 1100 1210 1235 1320 0.05 0.015 0.011 0.012 ±0.046 0.03
      AFB-LF is the default grease. For more detailed specifications, please download the Product Catalog with the link in the Downloads section on this page.
    • Ball screw specification
      Screw shaft diameter (mm) 25
      Lead (mm) 20
      BCD (mm) 26
      Thread minor diameter (mm) 17.5
      Number of circuits 2×1.8
      Axial clearance 0
      Basic dynamic load rating Ca (kN) 10.5
      Basic dynamic load rating C0a (kN) 19
      Preload torque (N-m) 0.049 to 0.22
      Spacer ball 1:1
      Rigidity (N/µm) 190
      Circulation method End Cap
      Applicable fixed side support unit EK20, FK20
      Applicable support side support unit EF20, FF20
      Model No. Stroke Screw shaft length Ball screw specifications Lead angle accuracy
      L1 L2 L3 Runout of the screw shaft axis
      D
      Runout of the nut circumference
      H
      Flange perpen-dicularity
      I
      Runout of the thread groove sruface
      J
      Representative travel distance error Fluctuation
      mm mm mm mm mm mm mm mm mm mm
      BNK2520-3.6G0+751LC5Y 500 610 640 751 0.055 0.015 0.011 0.013 ±0.03 0.023
      BNK2520-3.6G0+851LC5Y 600 710 740 851 0.055 0.015 0.011 0.013 ±0.035 0.025
      BNK2520-3.6G0+1051LC5Y 800 910 940 1051 0.055 0.015 0.011 0.013 ±0.04 0.027
      BNK2520-3.6G0+1251LC5Y 1000 1110 1140 1251 0.055 0.015 0.011 0.013 ±0.046 0.03
      BNK2520-3.6G0+1451LC5Y 1200 1310 1340 1451 0.055 0.015 0.011 0.013 ±0.054 0.035
      BNK2520-3.6G0+1651LC5Y 1400 1510 1540 1651 0.055 0.015 0.011 0.013 ±0.054 0.035
      BNK2520-3.6G0+1851LC5Y 1600 1710 1740 1851 0.055 0.015 0.011 0.013 ±0.065 0.04
      AFB-LF is the default grease. For more detailed specifications, please download the Product Catalog with the link in the Downloads section on this page.
  • Model Screw shaft outer diameter Lead
    (in mm)
    No. of circuits*1 Seals Clearance Shaft length
    (in mm)*1
    Accuracy Standard stock symbol
    BNK 15 10 - 5.6   G0 + 321L C5 Y
    BNK 15 10 Various No symbol : No seal G0 : 0 Length in millimeters then "L" C5 Y
      16 16   RR : Labyrinth seal
      20 20
      25

    Note 1: See the Specifications tab to see standard sizes available.