| |
PRODUCTS: Idlers (Steel Rollers) for conveyors
The revolutionary centrifugal self-cleaning action of the seals ensure that bearings are able to reach their designed life. Grease-free sealing elements result in
much lower friction values than conventional designs.
Range
|
STEEL CARRY ROLLERS |
| SERIES |
DIAMETER
(mm)
|
SHELL WALL
(mm)
|
NOMINAL SHAFT
DIAMETER (mm)
|
BEARING PART NO.
|
BRG.DYNAMIC
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
|
|
30
|
127
|
3.8
|
30
|
6206 - 2RS
|
19 500
|
|
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
|
152
|
6
|
45
|
6309 - 2RS
|
52 700
|
|
159
|
6
|
|
178
|
6
|
|
193
|
6
|
|
50
|
178
|
6
|
50
|
6310 - 2RS
|
61 800
|
|
193
|
6
|
|
60
|
193
|
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.
|
BRG.DYNAMIC
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
|
|
30
|
127
|
3.8
|
30
|
6206 - 2RS
|
19 500
|
|
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.
|
STEEL FLAT RETURN ROLLERS
|
|
SERIES
|
DIAMETER
(mm)
|
SHELL WALL
(mm)
|
NOMINAL SHAFT
DIAMETER (mm)
|
BEARING PART NO.
|
BRG.DYNAMIC
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
|
|
30
|
127
|
3.8
|
30
|
6206 - 2RS
|
19 500
|
|
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.
|
BRG.DYNAMIC
RATING (N)
|
|
SABS 25
|
127
|
3.8
|
25
|
6205 - 2RS
|
14 000
|
|
152
|
4
|
|
SABS 30
|
152
|
4
|
30
|
6206 - 2RS
|
19 500
|
|
SABS 30
|
178
|
4
|
30
|
6306 - 2RS
|
28 100
|
|
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.
|
BRG.DYNAMIC
RATING (N)
|
|
SABS 25
|
127
|
3.8
|
25
|
6205 - 2RS
|
14 000
|
|
152
|
4
|
|
SABS 30
|
152
|
4
|
30
|
6206 - 2RS
|
19 500
|
|
SABS FLAT RETURN ROLLERS
|
|
SERIES
|
DIAMETER
(mm)
|
SHELL WALL
(mm)
|
NOMINAL SHAFT
DIAMETER (mm)
|
BEARING PART NO.
|
BRG.DYNAMIC
RATING (N)
|
|
SABS 25
|
127
|
3.8
|
25
|
6205 - 2RS
|
14 000
|
|
152
|
4
|
|
SABS 30
|
152
|
4
|
30
|
6206 - 2RS
|
19 500
|
Specifications
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 than other bearing designs and classes.
Steel Tube: Only high quality tube specially manufactured for idlers for converyors 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. The shaft diameter tolerance
is as recommended by bearing manufacturers and ensures a js6 fit. Shaft end slots
are machined to customer standards.
Hollow Shaft: Stepped light weight hollow steel shafts equivalent in strength and rigidity to solid shafts are available on request.
Bearing Housing: Manufactured from deep drawing material
KHR1. Housings are pressed and MIG-welded to the inside of the tube.
Corrosion Protection: External coat of self Etch
primer unless otherwise specified.
Circular Movement Tolerance (TIR):
TIR does not exceed 0,5 mm measured at a distance of 25 mm from the roller end face. Actual TIR values are less and can be verified by reference to 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 Idlers for conveyors 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.
Consult Lorbrand for friction values.
Lorbrand is able to test rollers according to CEMA (Edition 6, Appendix F) "Kis" test
procedure and also actual friction values under various load and ambient temperature
conditions. Tests can be performed on actual bearings supplied on a particular project.
Typical friction values for 3 roll carry idlers
at rated load running at 500 rpm 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
|
FRICTION VALUES FOR SET OF 3 ROLLS IN NEWTONS
VALUES BASED ON 2RS TYPE BEARING SEALS
AND LGMT2 GREASE @ 500RPM & 40 DEG C BEARING TEMP
Seal Design
Primary Sealing
The success of the primary sealing area lies in the fact that dirt which enters
is ALLOWED TO ESCAPE. The metal seal collects dirt and flings it radially outward
due to centrifugal force (3-9 times gravitational).
Secondary Sealing
Dirt which enters secondary sealing area is again propelled outwards by centrifugal
force. All sealing surfaces are clean and free from contact and do not require packing
with grease. The sealing arrangement is so designed that water drains out of the
seal when the idler is stationary.
Most secondary seals on the market are of the labyrinth type and centrifugal force
actually helps keep dirt in the sealing area where it can work its way back to the
bearing.
Bearing Sealing
Greased for life bearings complete with seals on both sides are used. The bearing
seals form the final barrier against dirt ingress, especially rust particles which
are formed due to condensation inside the shell tube.
Standard Lorbrand idler rolls used in Shotblast Booth still turning
freely after 1 year operation
|
