Bosch Rexroth R065821240 Ball Bushing Linear Bearing

Bosch Rexroth R065821240 is a compact linear bushing (KBC-12-DD) that provides guided translational motion on a Ø12 mm shaft. The bushing has an outside diameter of 19 mm and a 12-mm bore, delivering a tight, space-saving profile for small-scale linear axes. In the DD variant, it includes two seals to protect the ball tracks from dust and debris while maintaining low friction; the seals work with Rexroth’s hardened segmental load-bearing plates that promote ball conformity in the running track for consistent, smooth movement at a range of speeds. The unit weighs about 0.02 kg, reflecting its compact, lightweight construction suitable for tight installations. Constructed with steel balls in machined grooves and hardened bearing plates, the R065821240 is engineered for a high dynamic load rating and long service life, even under frequent starts, stops, and directional changes common in automation and packaging machinery. Typical applications include automated positioning stages, small CNC slides, laboratory instrumentation, and other precision linear guidance tasks where compact form factor and reliable repeatability matter. This part is part of Rexroth’s standard linear bushing family and is commonly paired with compatible Rexroth shafting and a compact linear guide system to deliver repeatable positioning with low resistance.