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    Carr Lock Liner Bushings

    Carr Lock® Liner Bushings

    Jig & Fixture Bases

    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating.
    Primary Liner Bushings have a tight ID (+.0002/+.0007" tolerance) to provide a precise reference in two-axes.
    Secondary Liner Bushings have slight ID clearance (+.0010/+.0020" tolerance) to avoid binding.
    Slotted Locator Bushings have a tight ID tolerance in one direction and full relief in the perpendicular direction. Slotted Locator Bushings provide better accuracy than Secondary Liner Bushings, but take a few extra steps to install, and are available only in 16, 20, and 25mm ID sizes.

    Carr Lock® Primary Liner Bushings

    Primary Liner Bushings have a tight ID (+.0002/+.0007" tolerance) to provide a precise reference in two-axes. Made in the USA.

    Primary Liner Bushings are available for all Carr Lock® Clamp shank diameters, each in a choice of lengths for different top plate thicknesses (both inch and metric):
    13mm
    16mm
    20mm
    25mm
    30mm
    35mm
    50mm

    1144 steel, heat treated Rc 58-64. DFARS and RoHS compliant.

    Carr Lock® Secondary Liner Bushings

    Secondary Liner Bushings have slight ID clearance (+.0010/+.0020" tolerance) to avoid binding. Made in the USA.

    Secondary Liner Bushings are available for all Carr Lock® Clamp shank diameters, each in a choice of lengths for different top plate thicknesses (both inch and metric):
    13mm
    16mm
    20mm
    25mm
    30mm
    35mm
    50mm

    1144 steel, heat treated Rc 58-64. DFARS and RoHS compliant.

    Carr Lock® Slotted Locator Bushings

    All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in the USA.

    Slotted Locator Bushings are available for the following Carr Lock® Clamp shank diameters only:
    16mm
    20mm
    25mm

    Tool steel, heat treated Rc 58-62, black oxide finish. Roll pin for slotted locator bushing > Spring steel. DFARS and RoHS compliant.

    Application Information

    Each mounting point consists of three components:
    (1) Carr Lock® Clamp, with a precisely ground shank
    (2) Carr Lock® Liner Bushing or clearance hole in the top plate
    (3) Carr Lock® Receiver Bushing in the subplate

    Each top plate should have one Carr Lock Mount designated as its primary reference point, and one as its secondary reference point. These two mounts should be as far apart as possible. The secondary reference point should have a relieved liner to avoid redundant location (binding). Additional Carr Lock Mounts can be used for more clamping force, but these should be installed in clearance holes, not locating liners. Note that the same Carr Lock Clamp fits any type of liner or a clearance hole.

    Primary Reference Hole

    Each fixture plate must have one Primary Liner Bushing as its primary reference point. Primary Liners have a tight ID (+.0002/+.0007" tolerance) to provide a precise reference in two-axes.

    Secondary Reference Hole

    Each fixture must have one secondary reference point, either a Secondary Liner Bushing or a Slotted Locator Bushing. Secondary Liners have slight ID clearance (+.0010/+.0020" tolerance) to avoid binding. Slotted Locator Bushings have a tight ID tolerance in one direction and full relief in the perpendicular direction. Slotted Locator Bushings provide better accuracy than Secondary Liners, but take a few extra steps to install, and are not available in all sizes. Note: a Primary Liner could theoretically be used as a secondary reference if hole locations are held to +/-.0002".

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    CARR LOCK PRIMARY LINER BUSHING CL-13-CLPL-0.50

    SKU: CL-13-CLPL-0.50
    MPN: CL-13-CLPL-0.50
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-13-CLPL-0.75

    SKU: CL-13-CLPL-0.75
    MPN: CL-13-CLPL-0.75
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-16-CLPL-0.50

    SKU: CL-16-CLPL-0.50
    MPN: CL-16-CLPL-0.50
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-16-CLPL-0.75

    SKU: CL-16-CLPL-0.75
    MPN: CL-16-CLPL-0.75
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-20-CLPL-0.75

    SKU: CL-20-CLPL-0.75
    MPN: CL-20-CLPL-0.75
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-20-CLPL-1.00

    SKU: CL-20-CLPL-1.00
    MPN: CL-20-CLPL-1.00
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-25-CLPL-0.75

    SKU: CL-25-CLPL-0.75
    MPN: CL-25-CLPL-0.75
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-25-CLPL-1.00

    SKU: CL-25-CLPL-1.00
    MPN: CL-25-CLPL-1.00
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    CARR LOCK PRIMARY LINER BUSHING CL-30-CLPL-0.75

    SKU: CL-30-CLPL-0.75
    MPN: CL-30-CLPL-0.75
    Email Sales for Pricing
    The Carr Lock® System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bushing) and one mounting hole designated as the secondary reference hole (Secondary Liner Bushing or Slotted Locator Bushing). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .015-.030" over nominal size. Made in USA.

    Carr Lock Liner Bushings