Split spherical roller bearings

Product Description

Split spherical roller bearings (fig. 1) are primarily used for bearing positions which are difficult to access such as on long shafts which require support at several positions, or on cranked shafts. Their use is also beneficial where non-split bearings would require considerable time and effort for maintenance and more particularly for replacement; this would also cause long and expensive, or perhaps even inadmissibly long machine downtime.

Bearing design

NEWORLD split spherical roller bearings are based for the most part on non-split bearings of standard design. Consequently they represent state-of-the-art engineering. All the split bearings have a cylindrical bore and an annular groove and lubrication holes in the outer ring to facilitate effective lubrication. The joins of the inner ring are at an angle to the bearing axis in order to guarantee uninterrupted overrolling of the join. The bearing rings and cage are divided in the middle and the ring halves are held together either by screws or by clamping rings.

BSR.1 design

●   fig. 1

●   inner ring halves screwed together 

●   two integral retaining flanges

●   split machined brass cage, inner ring centred

BSR.2 design

●   fig. 2

●   inner ring with two integral retaining flanges

●   loose split clamping rings

●   split machined brass cage, inner ring centred

BSR.3 design

●   fig. 3

●   inner ring with two integral retaining flanges

●   loose split clamping rings

●   split steel pin-type cage (pierced rollers)

Features

Features

●  Allows safer and time-saving in situ bearing replacements in the trapped position on conveyor pulleys, stacker reclaimers and other machinery

●   Sealed variant available for increased protection against contamination and reduced maintenance

●   Longer service life compared to other split bearings, thanks to the wire cut inner and outer ring manufacturing technique and sealed versions  

●   Sealed variant reduces grease consumption – and cuts environmental impact

●   Compatible with NEWORLD metric and inch split block housings e.g. SNLD, SMS and SAF / SDAF

●   Reduced risk of shaft fretting with better axial clamping

●   Interchangeable with competitors’ split spherical roller bearings and split block housings

Standards

NEWORLD Cooper split spherical roller bearings are manufactured to ISO Normal precision and running accuracy. The mounted internal radial clearance of the split bearing is slightly more or less than the mounted clearance of a standard (CN) spherical roller bearing mounted on an adapter sleeve. Other bearing internal clearances (e.g. C3) are available upon request. 

The NEWORLD Cooper split spherical roller bearing can be used with NEWORLD metric and inch split block housings. The split bearing outer shroud is the same dimension as a standard ISO spherical bearing outer ring.

Bearing rating life

NEWORLD Cooper uses ISO 281:2007 to calculate the L10m modified rating life of the split spherical roller bearing. The sealed split bearing will have minimum two times longer rating life than the open (unsealed) bearings because of the improved exclusion of contamination. 

Temperature limits

Bearing components are heat stable up to 120 °C at continuous operation. The seals have a limit of –40 to +90 °C (–40 °F to +194 °F). Check that the bearing is adequately lubricated for normal operating conditions 

Permissible axial load

Owing to the steel inner ring clamp ring design, the NEWORLD Cooper split spherical roller bearings have 50–100% higher permissible axial shaft clamp load capability compared to competitor’s bearings. 

Misalignment

The split spherical roller bearing has a permissible angular misalignment between the inner and outer ring of 2° for bearings with shaft diameter less than 280 mm and 3° for bearings with 280 mm shaft diameter and larger.

Sealed bearings have a permissible misalignment of ± 0.5°. This is the same permissible misalignment as the NEWORLD TK taconite seal mounted in the NEWORLD split block housings.  

Application

Application

●  Mining

●  Mineral processing

●  Cement

●  Pulp and paper

●  Metals

●  Power generation

●  Sugar cane

●  Conveyor pulleys

●  Rope sheaves

●  Bucket elevators

●  Stacker Reclaimers

●  Hoists and winches

●  Horizontal grinding mill pinions

●  Mixers and agitators

●  Jack shafts

●  Fans