Procedure for Assembly

When assembling the Cross-Roller Ring, follow the steps below.

Preparations before assembly

• Thoroughly clean the housing and other assembly parts, and make sure there are no burrs.
• Loosen the bolts that prevent separation of the Cross-Roller Ring.
• If the two divided parts of the outer or inner ring are misaligned at the joints, correct the misalignment by gently hitting the ring with a plastic hammer or the like, and then install it. (For a type secured with rivets, install it as-is.)

Installing the Cross-Roller Ring into the Housing or onto the Shaft

Since the cross roller ring has a thin-walled structure, it is easily tilted during insertion. Use a plastic hammer or similar tool to level the cross roller ring by gradually hammering the perimeter while inserting. Carefully hammer until the sound of the ring coming into full contact with the mounting surface can be verified.

Note) When inserting the inner ring, hammer the inner ring. When inserting the outer ring, hammer the outer ring.

Assembly directions for RU and RAU

Models RU and RAU have insertion holes for installing rollers in the outer ring. (Filler plugs are attached.) Pay attention to the mounting direction so that the filler plugs do not overlap with the area under maximum load. (The periphery of the plugged section is slightly recessed, and a fixing pin is driven into its side.)

Assembly directions for RA...C

The outer ring of model RA...C has a slit for installing rollers. Position the mounting direction so that the split section does not overlap with the area under maximum load. (The split section has twosmall holes on the side marked with the product name.)

Attaching the Presser Flange

• Fit the presser flange to the single-piece ring (inner ring on models RB/RA, outer ring on model RE). In case of models RU and RAU, fit the presser flange to the rotational axis side.
• Place the presser flange onto the Cross-Roller Ring. Rock the flange several times to match the bolt holes. Also in case of model RU, rock the flange several times to match the bolt holes.
• Insert the presser bolts into the holes. Manually turn the bolts and make sure they do not show skewing caused by misalignment of the holes.
• Fasten the presser bolts in three to four steps from loose to fully fastened by tightening the bolts in a diamond pattern, as shown in Fig.1. When tightening the separated inner or outer ring, reciprocating the single piece outer or inner ring approximately four to five times (about 90°) will correct misalignment between the ring and the body.