SZ - Spline Shaft Anti-Backlash

SZ Spline Shaft
The SZ Series Spline shafts are available in 5 sizes from 1/8” to ¾” (3.18 to 19mm) diameter. Bushings are available in either a plain or threaded interface, both with anti-backlash compensation.

  • Anti-rotation spline
  • Maximum twist of 3 degrees / ft
  • Bushing with integral brass insert
  • Composite bushing with anti-backlash compensation
  • Dimensional Drawings +


    Maximum Twist: 3°/ft about Spline Shaft axis
    Torsional Clearance (SSA): 3° Bushing to Shaft
    Spline Shaft stiffness may be modeled as a round rod with diameters given.
    0.125-in rail size only available in SSAP and SSAT styles.


    Shaft
    Root
    Diameter
    Bushing
    Diameter
    Bushing
    Length
    Thread
    Thread
    Length
    Rail Diameter Code

    A B C M N
    in ± .002
    (mm ± 0.05)
    in ± .002
    (mm ± 0.05)
    in ± .001
    (mm ± 0.025)
    in ± .01
    (mm ± 0.25)

    in ± .002
    (mm ± 0.05)
     SZ 02 0.125
    (3.18)
    0.095
    (2.41)
    0.375
    (9.53)
    0.500
    (12.70)
    3/8-24
    0.250
    (6.35)
    SZ 04
    0.250
    (6.35)
    0.202
    (5.13)
    0.500
    (12.70)
    0.75
    (19.1)
    7/16-20 0.250
    (6.35)
    SZ 06
    0.375
    (9.53)
    0.306
    (7.77)
    0.625
    (15.88)
    1.00
    (25.4)
    9/16-20 0.375
    (9.53)
    SS 08
    0.500
    (12.70)
    0.419
    (10.64)
    0.813
    (20.65)
    1.50
    (38.1)
    3/4-20 0.500
    (12.70)
    SZ 012
    0.750
    (19.05)
    0.630
    (16.00)
    1.125
    (28.58)
    2.25
    (57.2)
    1-16 0.750
    (19.05)
  • Lubrication +


    Kerk Spline Shaft SZ assembly consists of a stainless steel spline shaft treated with Haydon Kerk Motion Solutions™ proprietary low friction Kerkote® TFE coating, mated with a Kerkite® composite polymer bushing.

    Kerkote TFE is a soft coating, a long-term dry lubricant that is optimized for softer plastics like acetyls and nylons, with or without mechanical reinforcement. Lubrication to the nut / lead screw interface occurs by the bushing picking up Kerkote TFE particles from the coating as well as from the migration of the internal lubricant within the plastic.
  • Customize +


    Haydon Kerk can custom-design and manufacture unique spline shaft solutions for your equipment requirements. Special rail lengths, multiple carriages, alternate lead screws, and lubrication are just some of the typical adaptations engineered to customer needs. Every Haydon Kerk linear rail product is supported by an experienced technical team recognized for innovation, customization, and dedicated customer service.
  • Part Number Guide +



    EXAMPLE:

    SZAT041K-12-XXXX = Spline shaft with anti-backlash, shaft and threaded bushing assembly, 1/4-in shaft, 1 bushing per rail, Kerkote® coating, 12-in length, with no special features added.

    GRBPO41N-00-XXXX = Guide rail, plain bushing only, 1/4-in shaft, with no special features added.