Primary Liner Bush
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Secondary Liner Bush
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Slotted Locator Bush
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FEATURES: The Ball Lock Mounting System requires that each fixture plate have one mounting hole designated as the primary reference hole (Primary Liner Bush) and one mounting hole designated as the secondary reference hole (Secondary Liner Bush or Slotted Locator Bush). All other mounting holes should be drilled clearance holes used for clamping only, not locating, .38-.76mm over nominal size.
PRIMARY REFERENCE HOLE: Each fixture plate must have one Primary Liner Bush as its primary reference point. Primary Liners have a tight ID (+.005/+.018mm tolerance) to provide precise reference in two-axes.
SECONDARY REFERENCE HOLE: Each fixture must have one secondary reference point, either a Secondary Liner Bush or a Slotted Locator Bush. Secondary Liners have slight ID clearance (+.025/+.051mm tolerance) to avoid binding. Slotted LocatorBushes have a tight ID tolerance in one direction and full relief in the perpendicular direction. Slotted LocatorBushes 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 +/-.005mm.
SIZES: Primary and Secondary LinerBushes are available for all Ball Lock Clamp shank diameters — see Dimensions page for part numbers:| | 13mm | | | 16mm | | | 20mm | | | 25mm | | | 30mm | | | 35mm | | | 50mm |
Slotted LocatorBushes ar are available for the following shank diameters:
MATERIAL: Primary and secondary liner bushes > 52100/1144 steel, heat treated Rc 58-64. Slotted Locator Bush > Tool steel, heat treated Rc 58-62, black oxide finish. Roll pin for slotted locator bush > Spring steel. |
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