GR - Guide Rail

Guide Rail
The GR Series Linear Guide Rail and Bushings are available in 4 sizes from 1/4” to ¾” (6.3 to 18.8mm) diameter. The assembly consists of a centerless ground and burnished stainless steel shaft mated with a Kerkite® composite polymer bushing. The material combinations have been selected so that thermal fluctuations have minimal effect on system performance. Additional lubricity and extended life can be obtained by using a low friction Kerkote® TFE coating on support shafts available in both stainless and alloy steel.
  • Specifications +


    Size
    Shaft Diameter
    Max Stroke
    Max Load
    Major Attribute
    Units
    mm m N  
    Guide Rail Rods and Bushing
    GR 04 6.35 0.9  5 Light load applications, low cost, minimal frictional drag and long wear life.
    GR 06 9.53 1.2  10
    GR 08 12.7 1.8  15
    GR 12 19.05 3.0  25
  • Dimensional Drawings +


    Standard Part Lengths Rail Diameter Rail Diameter w/TFE Bushing Outside Diam. Bushing Length Bushing Inside Diam. Snap Ring Groove Location Snap Ring Groove Diam. Snap Ring Groove Width Rail Chamfer Radial Load
    Rail Diameter Code

    A A B C D E F G H
    in ± .010
    (mm 0.25)
    in ± .0006
    (mm 0.015)
    in ± .0006
    (mm 0.015)
    in ± .0006
    (mm 0.015)
    in ± .010
    (mm 0.25)
    in ± .0005
    (mm 0.013)
    in +.010 –.000
    (mm 0.25)
    in ± .004
    (mm 0.100)
    in ± .0003
    (mm 0.008)
    in
    (mm)
    lbs
    (Kg)
    GR 04 6, 8, 10, 12 .2475 (6.287) .2472 (6.279) .5000 (12.700) .765 (19.43) .2485 (6.311) .535 (13.59) .450 (11.43) .040 (1.02) .020 (.51) 5 (2.3)
    GR 06 6, 12, 15, 18 .3715 (9.436) .3712 (9.428) .7500 (19.050) 1.275 (32.39) .3725 (9.462) .995 (25.27) .676 (17.17) .046 (1.17) .020 (.51) 10 (4.5)
    GR 08 12, 15, 18, 24 .4965 (12.611) .4962 (12.603) 1.0000 (25.400) 1.660 (42.16) .4975 (12.637) 1.330 (33.78) .900 (22.86) .046 (1.17) .020 (.51) 15 (6.8)
    GR 12 18, 24, 36 .7415 (18.834) .7412 (18.826) 1.2500 (31.750) 2.036 (51.72) .7425 (18.860) 1.620 (41.15) 1.125 (28.60) .058 (1.47) .030 (.76) 25 (11.4)
  • Lubrication +


    Kerk Guide Rail GR assembly consists of a centerless ground and burnished stainless steel shaft mated with a Kerkite® composite polymer bushing. The material combinations have been selected so that thermal fluctuations have minimal effect on system performance. Additional lubricity and extended life can be obtained by using a low friction Kerkote® TFE coating on support shafts available in both stainless and alloy steel.

    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 bushing / shaft 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 guide rail 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.