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Ball Screws

The Ball Screw is a high-efficiency feed screw with the ball making a rolling motion between the screw axis and the nut. Compared with a conventional sliding screw, this product has drive torque of one-third or less, making it most suitable for saving drive motor power.
Ball Screws
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Precision Ground Ball Screw - Ball Screw Assembly (Complete Package)

Standardized combinations of ball screw and other required components come as a package. Pre-assembled ball screw kit contributes to reduction of design and assembly time. Available ball screw models are compact nut type BNK (Shaft OD 6 ~ 10) & DIN standard high-speed type SDA (Shaft OD 10 ~ 25 mm). Intermediate flange & coupling are also available for multiple motor specs.

  1. Ball Screw Assembly
    Ball Screw Assembly
    Pre-assembled ball screw, support units, nut bracket, and housings
    (Ball Screw Shaft OD 6 ~ 25 mm)
  2. Intermediate Flange & Coupling Kit
    Intermediate Flange & Coupling Kit
    Select specs depending on motor to be used

Precision Ground Ball Screw – Finished Shaft Ends (Ready to Install)

Ball Screw shaft ends are machined to fit with THK’s standard support units (BK/BF, EK/EF, and FK/FF Series). Our standard support units can be found in Ball Screw Accessories.

  1. SDA-VZ Set - Preloaded
    SDA-VZ Set - Preloaded
    Finished Shaft Ends
    DIN Standard High-Speed
    (Shaft OD 10 ~ 25 mm)
  2. BNK Set - Preloaded
    BNK Set - Preloaded
    Finished Shaft Ends
    Compact Nut
    (Shaft OD 4 ~ 25 mm)
  3. BNK Set
    BNK Set
    Finished Shaft Ends
    Compact Nut
    (Shaft OD 4 ~ 25 mm)
  1. MDK Set - Mini Preloaded
    MDK Set - Mini Preloaded
    Unfinished Shaft Ends
    Flange with Through Holes
    (Shaft OD 4 ~ 14 mm)
  2. MDK Set - Mini
    MDK Set - Mini
    Unfinished Shaft Ends
    Flange with Through Holes
    (Shaft OD 4 ~ 14 mm)
  3. MBF Set - Mini
    MBF Set - Mini
    Unfinished Shaft Ends
    Flange with Counterbore Holes
    (Shaft OD 4 ~ 14 mm)
  4. BIF Set - Preloaded
    BIF Set - Preloaded
    Unfinished Shaft Ends
    (Shaft OD 16 ~ 50 mm)
  5. BNF Set
    BNF Set
    Unfinished Shaft Ends
    (Shaft OD 16 ~ 50 mm)
  1. BNS-A
    BNS-A
    Ball Screw/Spline - Miniature
    (Shaft OD 8 ~ 10 mm)
  2. BNS-V
    BNS-V
    Ball Screw/Spline
    (Shaft OD 16 ~ 25 mm)
  1. MTF Set - Mini
    MTF Set - Mini
    Unfinished Shaft Ends
    (Shaft OD 4 ~ 12 mm)
  1. BK
    BK
    Fixed Side-Square Type
    (Inner Diameter: 10 - 40 mm)
  2. EK
    EK
    Fixed Side-Square Type
    (Inner Diameter: 4 - 20 mm)
  3. FK
    FK
    Fixed Side-Round Type
    (Inner Diameter: 4 - 30 mm)
  4. BF
    BF
    Supported Side-Square Type
    (Inner Diameter: 8 - 40 mm)
  5. EF
    EF
    Supported Side-Square Type
    (Inner Diameter: 6 - 20 mm)
  6. FF
    FF
    Supported Side-Round Type
    (Inner Diameter: 6 - 30 mm)
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