Steel Rollers

Suitable for all applications and environments, Lorbrand manufactures one of the largest selections of steel conveyor rollers used extensively in overland applications around the world.

Incredibly robust, each roller consists of thick metal pressings which are MIG welded into conveyor-grade Electric Resistance Welded (ERW) tube, resulting in an extremely strong construction with low TIR (total indicator runout).

Key Aspects

  • Diameters – 89—219mm
  • Roll Lengths – 150—3000mm face length
  • TIR – Typically less than 0.5mm at roll ends
  • Bearing Sizes – Standard range 6204 to 6312
  • Noise – typically less then 75 dBA
  • Centrifugal labyrinth sealing arrangement
  • Material Specifications – SANS 657 III conveyor-grade steel tube

Steel Rollers Range
Our product range is not limited to these sizes. Please contact Lorbrand for more information on our full product range.

Steel Carry Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
20 89 3 20 6204 – 2RS 12 700
102 3.5
114 3.5
127 3.8
25 102 3.5 25 6205 – 2RS 14 000
114 3.5
127 3.8
133 4
139 4
152 4
159 4
27 127 3.8 25 6305 – 2RS 22 500
133 4
139 4
152 4
159 4
32 127 3.8 30 6306 – 2RS 28 100
133 4
139 4
152 4
159 4
178 4
35 152 6 35 6307 – 2RS 33 200
159 6
178 6
40 152 6 40 6309 – 2RS 52 700
159 6
178 6
193 6
219 6
45 152 6 45 6309 – 2RS 52 700
159 6
178 6
193 6
50 178 6 50 6310 – 2RS 61 800
193 6
60 178 6 60 6312 – 2RS 81 900
219 6

Shell wall thickness for CEMA idlers and rollers sized to meet CEMA guidelines for rotating mass and WK2 values.

Steel V-Return Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
20 89 3 20 6204 – 2RS 12 700
102 3.5
114 3.5
127 3.8
25 102 3.5 25 6205 – 2RS 14 000
114 3.5
127 3.8
133 4
139 4
152 4
159 4
27 127 3.8 25 6305 – 2RS 22 500
133 4
139 4
152 4
159 4
32 127 3.8 30 6306 – 2RS 28 100
133 4
139 4
152 4
159 4
178 4
35 152 6 35 6307 – 2RS 33 200
159 6
178 6
40 152 6 40 6308 – 2RS 41 000
159 6
178 6
193 6
219 6
45 178 6 45 6309 – 2RS 52 700
193 6
Steel Flat Return Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
20 89 3 20 6204 – 2RS 12 700
102 3.5
114 3.5
127 3.8
25 102 3.5 25 6205 – 2RS 14 000
114 3.5
127 3.8
133 4
139 4
152 4
159 4
27 127 3.8 25 6305 – 2RS 22 500
133 4
139 4
152 4
159 4
32 152 4 30 6306 – 2RS 28 100
159 4
178 4
35 152 6 35 6307 – 2RS 33 200
159 6
178 6
40 152 6 40 6308 – 2RS 41 000
159 6
178 6
193 6
219 6
45 178 6 45 6309 – 2RS 52 700
193 6

Shell wall thickness for CEMA idlers and rollers sized to meet CEMA guidelines for rotating mass and WK2 values.

Sabs Carry Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
SABS 25 127 3.8 25 6205 – 2RS 14 000
152 4
SABS 30 152 4 30 6306 – 2RS 28 100
178 4
SABS 35 152 6 35 6307 – 2RS 33 200
178 6
SABS 40 152 6 40 6308 – 2RS 41 000
178 6
Sabs Vee Return Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
SABS 25 127 3.8 25 6205 – 2RS 14 000
152 4
SABS 30 152 4 30 6306 – 2RS 28 100
Sabs Flat Return Rollers
SERIES DIAMETER (mm) SHELL WALL (mm) NOMINAL SHAFT DIAMETER (mm) BEARING PART NO. MIN BEARING DYNAMIC LOAD RATING (N)
SABS 25 127 3.8 25 6205 – 2RS 14 000
152 4
SABS 30 152 4 30 6306 – 2RS 28 100
Specs
Bearings
Deep groove double sealed or shielded bearings, of tolerance class C3 and C4, are used. This allows for a larger amount of angular misalignment at the bearing when compared with other bearing designs and classes.

Steel Tube
Only high-quality tube specially manufactured for conveyor idlers is used and conforms to SABS 657/3 (1980). Shell ends are machined to prevent belt wear.

Steel Shaft
Manufactured from steel which complies with the requirements for grade 070 M20 of BS 970-1. Shaft diameter tolerance adheres to bearing manufacturer standards and ensures a js6 fit. Shaft end slots are machined to customer standards.

Hollow Shaft
Stepped lightweight hollow steel shafts, equivalent in strength and rigidity to solid shafts, are available on request.

Bearing Housing
Manufactured from deep drawing steel to EN 10111(DD14). Housings are pressed and MIG welded to the inside of the tube.

Corrosion Protection
An external coat of self-etching primer is applied unless otherwise specified.

Circular Movement Tolerance (TIR)
TIR does not exceed 0,5mm measured at a distance of 25mm from the roller end face. Actual TIR values are less and can be verified by referencing historical data.

ROLLER FACE LENGTH (MM) TIR
D<=127 D>127
Up to 536 0.5 0.6
586 to 965 0.7 0.9
994 to 1 450 1.3 1.6
1 602 to 2 518 1.9 2.3
Idler Running Friction

Lorbrand conveyor Idlers have frictionless seals. Idler drag is due to bearings only and is therefore easy to predict. Drag is dependent on factors such as loading, rpm, bearing type, characteristics and temperature.

Please consult Lorbrand for friction values.

Lorbrand is able to test rollers according to CEMA (Edition 6, Appendix F) “Kis” test procedures and actual friction values under various load and ambient temperature conditions. Tests can be performed on bearings supplied for a particular project. Typical friction values for 3 roll carry idlers, at rated load running at 500rpm, are listed below:

BW BW 3 Roll Carry Idler Running Friction (N)
in mm CEMA B 6204 CEMA C 6205
rated load 3 rolls 3 rolls rated load 3 rolls 3 rolls
kg 102 DIA 127 DIA kg 102 DIA 127 DIA
400
18 450 186 2.3 1.9 409 3.5 3.0
20 500 186 2.3 1.9 409 3.5 3.0
24 600 186 2.3 1.9 409 3.5 3.0
30 750 186 2.3 1.9 409 3.5 3.0
36 900 186 2.3 1.9 380 3.4 2.8
1000 175 2.3 1.8 370 3.3 2.8
42 1050 165 2.2 1.8 360 3.2 2.7
48 1200 160 2.2 1.8 338 3.1 2.6
54 1350 317 3.0 2.5
1400 310 2.9 2.4
60 1500 295 2.8 2.4
BW BW 3 Roll Carry Idler Running Friction (N)
in mm SERIES 27 6305 SERIES 30 6206
rated load 3 rolls 3 rolls rated load 3 rolls 3 rolls
kg 127 DIA 152 DIA kg 127 DIA 152 DIA
400
18 450 409 3.8 3.2
20 500 409 3.8 3.2
24 600 409 3.8 3.2 464 4.7 4.0
30 750 409 3.8 3.2 464 4.7 4.0
36 900 380 3.7 3.1 464 4.7 4.0
1000 370 3.6 3.0 464 4.7 4.0
42 1050 360 3.5 3.0 464 4.7 4.0
48 1200 338 3.4 2.9 464 4.7 4.0
54 1350 317 3.3 2.8 391 4.2 3.5
1400 310 3.2 2.7 385 4.2 3.5
60 1500 295 3.2 2.7 375 4.1 3.4
1600 365 4.0 3.4
72 1800 343 3.9 3.2
BW BW 3 Roll Carry Idler Running Friction (N)
in mm CEMA D 6306 SERIES 35 6307
rated load 3 rolls 3 rolls rated load 3 rolls 3 rolls
kg 152 DIA 178 DIA kg 152 DIA 178 DIA
24 600 545 4.7 4.0
30 750 545 4.7 4.0
36 900 545 4.7 4.0 818 7.4 6.3
1000 545 4.7 4.0 818 7.4 6.3
42 1050 545 4.7 4.0 818 7.4 6.3
48 1200 545 4.7 4.0 818 7.4 6.3
54 1350 507 4.5 3.9 818 7.4 6.3
1400 500 4.5 3.8 818 7.4 6.3
60 1500 486 4.4 3.7 818 7.4 6.3
1600 472 4.3 3.7 818 7.4 6.3
72 1800 444 4.1 3.5 818 7.4 6.3
2000 780 7.1 6.1
84 2100 761 7.0 6.0
96 2400 740 6.8 5.8
BW BW 3 Roll Carry Idler Running Friction (N)
in mm CEMA E 6308 SERIES 45 6309
rated load 3 rolls 3 rolls rated load 3 rolls 3 rolls
kg 152 DIA 178 DIA kg 152 DIA 178 DIA
36 900 818 8.6 7.3
1000 818 8.6 7.3
42 1050 818 8.6 7.3
48 1200 818 8.6 7.3
54 1350 818 8.6 7.3
1400 818 8.6 7.3
60 1500 818 8.6 7.3 1250 13.6 11.6
1600 818 8.6 7.3 1250 13.6 11.6
72 1800 818 8.6 7.3 1250 13.6 11.6
2000 780 8.3 7.1 1250 13.6 11.6
84 2100 761 8.2 7.0 1250 13.6 11.6
96 2400 740 8.0 6.8 1150 12.7 10.9
BW BW 3 Roll Carry Idler Running Friction (N)
in mm CEMA F 6310 SERIES 60 6312
rated load 3 rolls 3 rolls rated load 3 rolls
kg 178 DIA 219 DIA kg 219 DIA
60 1500 1364 14.0 11.4
1600 1364 14.0 11.4
72 1800 1364 14.0 11.4 1600 16.1
2000 1364 14.0 11.4 1600 16.1
84 2100 1364 14.0 11.4 1600 16.1
96 2400 1273 13.3 10.8 1600 16.1
108 2500 1600 16.1
2600 1600 16.1
2800 1600 16.1
3000 1600 16.1
Seal Design
To ensure the smoothest most energy-efficient ride possible, each Lorbrand steel roller employs a three-seal design that eliminates dirt through self-cleaning.

Primary Seal
Any dirt that enters the primary seal is collected and then allowed to escape by being flung radially outward through centrifugal force.

Secondary Seal
Most secondary seals on the market utilise a labyrinth design which prevents dirt from escaping the sealing area—with centrifugal force actually keeping dirt in—before working its way back to the bearing.

Lorbrand’s secondary seals avoid this problem because all sealing surfaces are free from contact, they do not require packing with grease and the seal arrangement allows water to drain freely when the roller is stationary. The result: dirt is unrestricted when being propelled outwards by centrifugal force.

Bearing Seal
As the final barrier against dirt ingress, especially rust particles that form due to condensation inside the shell tube, each Lorbrand bearing features seals on both sides and is lubricated for life.