This series has generally replaced John King cast link detachable chains. The simple “hook and bar” construction is maintained by a steel profile is employed in place of a casting with the obvious benefit of higher tensile strengths and therefore chain working loads.
Chain can run in both directions but will wear less if the hook trails with the exception of fine grained abrasive materials where hook should lead. ead.
JK PATTERN STEEL DETACHABLE CHAINS
| Chain Number | Style | A (mm) | B (mm) | C (mm) | D (mm) | Links per Metre | Weight (kg/m) | Ultimate Strength (N) |
|---|---|---|---|---|---|---|---|---|
| JK55 | A | 41.7 | 36.5 | 16.5 | 10.5 | 24 | 1.35 | 25,000 |
| JK57 | A | 59 | 48 | 24 | 10.5 | 16.9 | 1.55 | 34,000 |
| JK62 | A | 41.7 | 42.5 | 20.5 | 10.5 | 24 | 1.60 | 30,000 |
| JK72 1/2 | B | 42.2 | 52 | 24 | 10.5 | 23.7 | 2.00 | 33,000 |
| JK74 | A | 60.6 | 65 | 28 | 15.7 | 16.5 | 3.80 | 65,000 |
| JK78 | B | 67.1 | 70 | 28 | 12.5 | 14.9 | 3.15 | 50,000 |
| JK103 | C | 78.5 | 87 | 32 | 17.7 | 12.7 | 5.75 | 75,000 |