Specifications
Twenty-four standard backing widths, the U.S. nominal each one sits against, tolerance, roll length and lead times. Non-standard widths are quoted, not refused.
| The nominal you run | Equals | Route | Existing die sits at |
|---|---|---|---|
| 1/4″ · .250 | 6.35 mm | Off existing tooling | 6.4 mm · 0.05 over |
| .430″ | 10.92 mm | Off existing tooling | 11.0 mm · 0.08 over |
| .270″ | 6.86 mm | Sample first, then decide | 7.0 mm · 0.14 over |
| 3/16″ · .187 | 4.76 mm | Dedicated die recommended | 4.5 mm · 0.26 under |
| 1/2″ · .500 | 12.70 mm | Confirmed — special run | 12.55–12.8 mm, splice-free |
On 3/16″ our 5.0 mm is fractionally closer in absolute terms (0.24 over), but the table lists 4.5 mm because an undersize backing still enters the slot and an oversize one may not. Ask for both and try them side by side before anyone cuts anything.
The twenty-four widths already on tooling
These run with no tooling charge. A width that is not on this list is quoted, not refused — the routing table above shows how a U.S. nominal lands against them.
- 4.157″
- 4.5.177″
- 4.7.185″
- 5.197″
- 5.4.213″
- 6.236″
- 6.2.244″
- 6.4.252″
- 7.276″
- 7.5.295″
- 8.315″
- 8.4.331″
- 9.354″
- 9.5.374″
- 10.394″
- 11.433″
- 11.5.453″
- 12.5.492″
- 12.8.504″
- 13.7.539″
- 15.591″
- 19.5.768″
- 25.984″
- 401.575″
Millimetres are the manufactured dimension; the inch figure is the conversion, not a separate size. Tolerance on every one of them is ±0.15 mm.
A die is not a wall
Our standard tooling is metric and U.S. channels are cut to imperial nominals, so the dies we already have land near your nominal rather than exactly on it. We publish that gap instead of rounding it away, because you would find it on the first assembly anyway.
Where the gap matters, we cut a die for your nominal. It is quoted once, in writing, credited back against your production orders, and reserved to your part number — so it behaves as a deposit rather than a fee. That is the normal route here, not a favour: most of what leaves the plant runs on tooling cut for one customer.
1/2″ is confirmed. It runs as a dedicated line rather than off our standard metric dies — splice-free, cut to your roll length. Ask for a sample and we will quote against it.
| Attribute | Range |
|---|---|
| Pile height | from 2.5 mm (0.098″) upward |
| Pile material | Polypropylene |
| Centre fin | Available |
| Silicone treatment | Available |
| Colours | Multiple standard; custom on request |
| Attribute | Value |
|---|---|
| Standard spool length | Made to your put-up — tell us the run length |
| Maximum splice-free run | 300–1,000 ft (91–305 m) is routine; longer runs quoted |
| Dimensional tolerance | ±0.15 mm |
| Minimum order quantity | No minimum on a first order — after that it scales with price, quoted per volume |
| Sample lead time | 15 days on existing tooling; 30 days if a new backing profile has to be cut |
| Production lead time | 15 days ex-works on a first order, from receipt of deposit. U.S. contract volumes have run 30–45 days. Add 10 days if the filament colour has to be spun to order. |
Preliminary spec sheet
One page: every figure published above, the section drawing, and the imperial conversion table. Fields still being confirmed with the plant are marked as such rather than filled in with a guess.
Tell us the sizes you run
We will send physical samples of the closest match, free of charge, freight collect on your courier account. No call required.