Table 1 Widths of Friction Surface Rubber Transmission Belting
| Nominal Belt Width (mm) | Tolerance on Width of Belt (mm) |
|---|---|
| 25 | ± 2.0 |
| 32 | |
| 32 | |
| 32 | |
| 32 | |
| 75 | ± 3.0 |
| 80 | |
| 90 | |
| 100 | |
| 112 | |
| 125 | |
| 140 | ± 4.0 |
| 160 | |
| 180 | |
| 200 | |
| 224 | |
| 250 | |
| 280 | ± 5.0 |
| 315 | |
| 355 | |
| 400 | |
| 450 | |
| 500 |
Table 2 Thicknesses Of Friction Surface Rubber Transmission Belting
| Ply Construstion | Nominal Nelt Thickness, Hard Type Fabric | Tolerance |
|---|---|---|
| mm | mm | |
| 3 ply | 3.9 | ±0.5 |
| 4 ply | 5.1 | ±0.7 |
| 5 ply | 6.4 | ±0.8 |
| 6 ply | 7.7 | ±0.9 |
| 7 ply | 9.1 | ±1.0 |
| 8 ply | 10.4 | ±1.1 |
Table 3 Thicknesses Of Friction Surface Rubber Transmission Belting
| Length Ordered (mm) | No. of Samples |
|---|---|
| Up to 500 | 1 |
| 501 to 1000 | 2 |
| 1001 to 2000 | 3 |
| 2001 to 3500 | 4 |
| 3501 to 5000 | 5 |
| 5001 to 7000 | 6 |
| 7001 to 10000 | 7 |
When placing the order, the purchaser shall seate whether tests are required and if so, additional length for the sample shall be included in the total length ordered and paid for by the purchaser.
Tests
Elongation Test
The average warp elongation of the fabric of the finished belting, when tested in the manner described in Appendix A, shall be not less than 4 percent and not more than 8 percent under a load of 1.8 kgf/mm of width per ply.
Tensile Test
The average tensile strength of the fabric of the finished belting when tested in the manner described in Appendix B, shall be not less than the values given in Table 4.
Table 4 Tensile Strength Of Fabric In Finished Belting
| Type of Fabric | Nominal Nelt Thickness, Hard Type Fabric | Tensile Strength | |
|---|---|---|---|
| Warp | Weft | ||
| g/m² | kgf/mm of Width Min | kgf/mm of Width Min | |
| 28 | 810 | 6.25 | 3.00 |
| 31 | 910 | 6.25 | 3.50 |
| 32 | 930 | 7.00 | 3.30 |
| 34 | 970 | 7.00 | 4.50 |
The tensile strength of any individual fabric ply, warp or weft, of the finished belting, shall be not less than 80. percent of the figures given in Table 4.
