Thrust Collars: Rolling Mills

Description: Superbolt® Thrust Collars are primarily used in the steel industry on bearing back-up rolls and rolling mill work rolls. They replace the usual split thread and lock rings that are used to load the bearings. The entire thrust collar is carried in the roll chock and the only piece to be manipulated is a split ring that is inserted into a groove in the roll neck. The only tool required is a hand held impact wrench or torque wrench.

Advantages and Benefits:

• Worker Safety: Eliminates injury from heavy lifting of existing nut or from using crane/cable tightening methods. Example: In one mill, five injuries in two years were reduced to zero.

• Reduced Crane Time: Thrust collars are attached to the chock. After the chock is put on the roll, the split ring is inserted and the jackbolts are tightened. The crane is then available for other lifts.

• Cost Effective: More rolls can be built up with less manpower. “Overtime” has been eliminated or reduced in several roll shops.

• Eliminates Standard Bearing Nuts: Due to the unthreaded design, stripping or crossthreading of bearing nuts is eliminated. Down time to repair this condition is no longer required.

• Ease of Build-Up: The quick change split ring makes it easier and faster to build up rolls.

• Installation and Training Available: Installation of initial Thrust Collars and training of the roll change crew is provided.

Example of Superbolt thrust collar: A modified thrust collar is retained in the chock, which requires only the manipulation of the split ring.

Superbolt Thrust Collars are custom designed to suit your mill, and they require assembly drawings of your chock, bearing and roll. Slight changes to the end ring or other parts may occasionally be required.