The 70 Rokku Mu is the first caster of its kind. This is the locking/braking version of our 70 Mu, with a lever actuated brake on the rear of the caster (down for lock, up for free). It utilizes one high-precision chrome steel radial ball bearing per caster (for linear motion), and two self-lubricating journal bearings (for independent tire rotation) in an efficient arrangement that allows for exceptionally smooth operation and twice the load rating of typical “high-capacity” chair casters. Because of this hybrid bearing arrangement which lowers cost of production and reduces weight by 30%, the aperture on the 70 Mu is 17% smaller than the 70 Okina Mu. This is the size most often associated with typical office chairs, tables and case goods. Select our 11mm friction sleeve stem mount for chair sockets, and plate mounts or threaded stems for case goods as necessary. Available with easily accessible brake and with an estimated load capacity of 150 lbs. per caster (5 casters = 750 lbs., 4 casters = 600 lbs.). Covered by US patent 8561258. International patents pending. Certified compliant with BIFMA X5.1 durability standards for office chairs.
Please note, the braking lever on the 70 Rokku Mu extends approximately 3/8″ out from the rear of the caster. This lever actuated brake was primarily designed for use with case goods, white boards, carts, etc. in mind. When used on seating applications, it is possible for this lever to contact the back of one’s heel when sitting. For this reason, we recommend the non-braking 70 Mu for chair applications unless the braking capability outweighs this potential interference.
