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TENSILE STRENGTH
Full belt tensile strengths are guaranteed and often exceed those built to our national standards.
LOW ELONGATION
Minimum belt elongation means minimum take-up requirement.
HIGH IMPACT RESISTANCE
Generally interply skim layers and impact absorbing fabric ensures a much greater capacity to flex without fracturing under high impact conditions.
MOISTURE RESISTANCE
All components of NRC Belting are improve to the effects of moisture.
RESISTANCE TO EDGE WEAR
Cut edge construction means that All Fabric ply across the width of belt. Fabric reinforced edges are much tougher than moulded edges produced by homogeneous rubber. NRC belting is normally supplied in cut edge construction unless specified.
HIGH RIP AND TEAR RESISTANCE
Heavy fabric ”weft” produces high tear resistance and superior fastener holding efficiency. |
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| Step Lengths |
BELT CLASS |
NO. OF PILES |
2 |
3 |
4 |
5 |
160
200
250
315
400
500
630
800
1000
1250
1600
2000 |
150
150
150
150
200
300
300
400
450
-
-
- |
-
-
-
150
200
300
300
400
450
600
-
- |
-
-
-
-
150
200
200
250
300
400
500
525 |
-
-
-
-
-
150
150
200
250
300
400
400 |
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HIGH ADHESIONS
Specialised fabric treatment (RFL) produces the highest belt adhesion levels. This ensures maximum splice efficiencies and prevents failure due to flex fatigue. |
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| Splicing Details |
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| * Splice Length= (n-1)*S |
B = Belt width (mm) |
For 2 ply belts |
| n = no, of plies |
z = Additional length required to splice |
Splice length = n-s |
| S = Step length |
(mm) endless (mm) = Splice Length + 0,3B |
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| HOT SPLICING CURING TABLE |
SPLICE
THICKNESS (mm) |
CURING TIME
(min) |
TEMPERATURE
(0C) |
Up to 6
6 - 12
13 - 20
21 - 26 |
25
30
35
45 |
145 + 50 (Thermostat)
145
145
145 |
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Cold Splicing
- A substantial proportion of belt splices are carried out using cold splicing techniques.
- Provided the correct procedure is followed cold splices are suitable for most belt installations.
- Cold splices should not be used for belts operating in chemically aggressive environments or carrying hot materials. |
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Rolled Belt Diameters
The weight and size of roll must be given consideration for shipment convenience and handling on site. Roll diameter to width ration must be considered carefully. Recommended 3.5:1 to prevent handling and shipping difficulties. |
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