Plain Linear Bearing CFPJ40C 40mm JIS, Square Flanged Center, Double Wide, Compensated ID you can order the matching

you can order the matching 6mm wrench as part #6101227

To adjust the carriage preload

Carriage Only - matching rail part number CR20 sold separately

Optional liners: Frelon®J (corrosive chemical proof) & Frelon®W (FDA Compliant)

Its double-sized body equals two standard bearings back-to-back for added support

Plain Linear Bearing CFPJ40C 40mm JIS, Square Flanged Center, Double Wide, Compensated ID you can order the matchingJIS Double Plain Linear Bearing, 40mm ID, square center flange, compensated running clearance. This Simplicity bearing has a self lubricating FrelonGOLD liner bonded directly to the bore of a sturdy anodized aluminum body, with no separate insert, for maintenance free, oil free sliding in harsh environments such as extreme heat, dirt, welding splatter, and vibration, where ball bearings often fail. Its double sized body equals two standard bearings