Four-Row – Royal Enterprises

SRNB (Sealed Four-Row Bearing)

admin — Thu, 20 Feb 2020 21:19:20 +0000

SRNB (Sealed Four-Row Bearing)

Sealed roll neck bearings provide strength where it counts for flat product rolling mills. Our premium quality four-row sealed bearings are designed to operate at high speeds and withstand harsh environments, even while carrying heavy loads.

Built with highly rated Timken^® tapered roller bearings, our sealed roll neck bearings are expected to provide a lower cost of ownership due to less required maintenance and longer bearing life. Timken case-carburized, high-capacity tapered roller bearings offer durable toughness.

The newest Timken sealed roll neck bearing is the integrated seal design that exemplifies our focus on advancing technology for the metals industry. Also available are the seal carrier design, many special designs and custom designs.

Size range:

ID: 195.000 mm to 710.550 mm (7.6772 in. to 28.2500 in.)
OD: 270.000 to 946.150 mm (10.6300in. to 37.2500 in.)

Design Attributes

Four single cups for optimum load sharing.
Cup spacers available with or without lube groove and holes.
Improved surface finishes to enhance lubrication performance.
Inboard and outboard cone face slots that reduce cone face wear.
Spiral bore grooves with blended radii to eliminate roll neck damage.
Case-carburized components to improve toughness and increase fatigue life.
Patented seal designs with improved contact geometry for enhanced sealing.
Enhanced roller profiling for even load distribution, which reduces edge stress.
No central cone or cup spacers to minimize number of components to be handled.
Effective sealing at cup outer diameter (OD) to seal contaminants away from bearing OD and chock bore.

Applications

Rolling mills

TQOW (Straight Bore with Cone Face Lubrication Slots)

admin — Thu, 20 Feb 2020 21:11:10 +0000

TQIT (Tapered Bore Four-Row Assembly)

Type TQIT bearings have a tapered bore that is matched and continuous through the inner races. This allows for an interference fit on the backup rolls of high-speed mills, where a loose inner race fit of a straight bore bearing could cause excessive neck wear.

The indirect mounting of the bearing pairs increases the overall effective spread of the bearing, providing optimum stability and roll rigidity.

Size range:

ID 123.022 mm to 1004.633 mm (4.8434 in. to 39.5525 in.)
OD 174.625 mm to 2032.000 mm (6.8750 mm to 80.0000 in.)

Design Attributes

Two tapered-bore single cones, one tapered-bore double cone, four single cups and three cup spacers.
Front faces of single cones and both faces of double cone are extended to contact each other.
Tapered cone bores are matched for continuous taper through the cones.
Lubrication delivered through three cup spacers.
Preset, matched assemblies, serial numbered to assure correct installation.

Applications

Roll necks of high-speed rolling mills

TQO (Straight Bore Four-Row Assembly)

admin — Thu, 20 Feb 2020 21:05:52 +0000

TQO (Straight Bore Four-Row Assembly)

TQO bearings are directly mounted and comprised of two double inner races, two single and one double outer race, with an inner race spacer and two outer race spacers.

Slots in the inner race spacer permit lubricant to flow from the bearing chamber to the roll neck. The inner race spacers are hardened to minimize face wear.

Size range:

ID 50.800 mm to 1500.000 mm (2.0000 in. to 59.0551 in.)
OD 83.337 mm to 2032.000 mm (3.2810 in. to 80.0000 in.)

Design Attributes

Two double cones, two single cups and a double cup with a cone spacer and two cup spacers.
Spacers have slots or holes for lubrication.
Cone spacers are hardened to reduce face wear.
Numbered serially to assure correct installation sequence.

Applications

Low- and medium-speed rolling mills