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SZ - Spline Shaft Anti-Backlash

SZ Spline Shaft Anti-Backlash
The SZ Series Spline shafts are available in 4 sizes from 1/8” to 1/2” (3.16 to 12.7mm) 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

  • Specifications +


    Size Shaft Diameter Max Stroke Max Load  Major Attribute
    Units mm m  NM
    Spline Shafts with Anti-Backlash
    SZ 02 3.18 0.45  2 Spline, anti-backlash, light to moderate loads, low cost, low friction, and long life.
    SZ 04 6.35 0.90  5
    SZ 06 9.53 1.2  10
    SZ 08 12.7 1.8  15

  • Dimensional Drawings +


    Please note: Metric numbers are for reference only.

    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)

  • Materials Available +


    Spline Shaft Materials Internal Diameter SS2 SS4 SS6
    		 SS8
    Solid  Aluminum (6061)  N/A   •
    		   •
     Stainless (304) • • • •
     Melonited Steel (12L14)   •   •
     Hollow  Aluminum (6061)  0.340" [8.6mm]       •

  • 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 +




    SZ

    A

    T

    04

    1

    K

    -

    08

    -

    XXX

    Prefix

    Nut Style

    Mounting

    Rail Diameter

    Number of Bushings per Rail

    Coating

    Length in Inches

     

    Unique Identifier

    SS=Spline Shaft

    SZ=Anti-Backlash Spline Shaft

    A=Assembly
    B=Bushing only
    S=Shaft only

    T=Threaded
    P=Plain (no features)
    S=Shaft only
    X=Custom

    02=1/8-in
    04=1/4-in
    06=3/8-in
    08=1/2-in

     

     

    0
    1
    2
    3
    4
    5

    Use “0” for Shaft only and “1” if Bushing only

    S=Uncoated
    K=Kerkote
    B=Black Ice
    N=Bushing only

    (Rounded up)

    Example:
    06=6-in
    08=8-in
    00=Bushing only

     

    Proprietary suffix assigned to a specific customer application. The identifier can apply to either a standard or custom part.

    NOTE: Dashes must be included in Part Number (–) as shown above. For assistance call our Engineering Team at 203 756 7441.