Cadwyni traca ddefnyddir ar teirw dur yn gyffredinol yn cael eu rhannu'n ddau fath:cadwyni iroa chadwynau aneirif.Mae'r gadwyn iro (Trac Wedi'i Selio ac Iro, SALT) yn defnyddio iro olew, a all leihau'r blinder rhwng ypin a'r llwyn.Fe'i defnyddir fel arfer ar gyfer gyrru'n aml.Mae'r rhan fwyaf o deirw dur a chloddwyr yn defnyddio cadwyni iro, lle mae gwregysau mewnol ar binnau'r gadwyn iro.Mae cronfa ar gyfer olew, sy'n llifo i'r gofod annular rhwng y pin a'r bushing trwy dwll rheiddiol y pin ac yn cael ei gadw gan sêl yn y cylch cadwyn.Mae'r dyluniad hwn yn helpu i ymestyn oes y gadwyn.
| Eitem | Math | A | B | C | B1 | C1 | N | M | D | E | D1 | E1 | L | I | ΦR | ΦH | ΦG | ΦF | ΦT | P | W | Defnyddir ar gyfer |
| 1 | T154GA | 154 | 57 | 44 | 57 | 44 | 40 | 87 | 82.4 | 112.4 | 82.4 | 112.4 | 123.4 | 53.4 | 47 | 28.6 | 47 | 14.5 | 15.5 | 165.6 | M14*1.5 | D31 D30 |
| 2 | T155GA | 155.6 | 54.8 | 48.7 | 38.7 | 58.7 | 39 | 88 | 88.9 | 104.7 | 86 | 97.1 | 130.5 | 59.5 | 50 | 28.6 | 47 | 14.5 | 15.5 | 162.4 | M14*1.5 | |
| 3 | T171GA | 171.4 | 60.3 | 55.6 | 38.1 | 67.2 | 42.9 | 101.6 | 108 | 108 | 104.8 | 110 | 145.5 | 71.5 | 54 | 33.5 | 54 | 16.5 | 17.5 | 180.6 | 5*/8-18UNF | D4D D4 |
| 4 | T171GB | 171.45 | 60.3 | 55.6 | 38.1 | 66.68 | 43.2 | 95.2 | 108 | 108 | 104.8 | 110.2 | 148.5 | 74.5 | 54 | 33.5 | 54 | 16.5 | 17.3 | 184 | 5*/8-18UNF | D4E |
| 5 | T175GA | 175 | 57 | 54 | 57 | 54 | 45 | 101.5 | 122.4 | 158.4 | 122.4 | 158.4 | 171.5 | 83.8 | 59.5 | 36 | 57 | 16.5 | 17.5 | 216.4 | M16*1.5 | D41 D50 D53A D58E |
| 6 | T190GA | 190 | 69 | 58 | 66.5 | 60.5 | 46 | 106 | 119.6 | 155.6 | 119.6 | 155.6 | 173.6 | 81.6 | 59.5 | 36 | 57 | 20.5 | 22.5 | 211 | M20*1.5 | E200B/E320/SK200 |
| 7 | T190GB | 190 | 62 | 58 | 57 | 60.5 | 47 | 105 | 124.4 | 160.4 | 124.4 | 160.4 | 174.2 | 82.8 | 59.5 | 36 | 57 | 20.5 | 22.5 | 211 | M20*1.5 | SD13 PC200-5 |
| 8 | T190GC | 190 | 62 | 58 | 57 | 60.5 | 47 | 105 | 124.4 | 160.4 | 124.4 | 160.4 | 174.2 | 82.8 | 59.5 | 36 | 57 | 18.5 | 20.5 | 211 | M18*1.5 | PC200-3 EX200-2/3/5 |
| 9 | T203GA | 202.8 | 76.2 | 58 | 44.4 | 78 | 51.9 | 121.4 | 133.4 | 171.5 | 134.1 | 158.8 | 193.3 | 102.3 | 69.8 | 44.7 | 66.8 | 19.5 | 20.5 | 230 | M18*1.5 | D6C/D6D |
| 10 | T203GB | 203.2 | 72.2 | 58 | 72.2 | 58 | 52 | 116 | 138.4 | 178.4 | 138.4 | 178.4 | 198.2 | 101.4 | 69.8 | 44.7 | 66.8 | 20.5 | 22 | 243 | M20*1.5 | D65 SD16 D68 TY160 |
| 11 | T203GC | 203.2 | 72.2 | 58 | 72.2 | 58 | 52 | 116 | 138.4 | 178.4 | 138.4 | 178.4 | 198.2 | 101.4 | 69.8 | 44.7 | 66.8 | 19.5 | 20.5 | 243 | 3"/4-18UNF | D60 |
| 12 | T216GA | 216 | 76.2 | 64 | 76.2 | 64 | 59 | 129 | 146 | 184 | 143 | 181 | 210.8 | 108.8 | 74.5 | 47.1 | 71.4 | 19.5 | 20.5 | 254 | 3"/4-18UNF | D7G |
| 13 | T216GB | 216 | 76.2 | 64 | 76.2 | 64 | 58 | 129 | 146 | 184 | 143 | 181 | 210.8 | 108.8 | 74.5 | 47.1 | 71.4 | 20.5 | 21 | 254 | M20*1.5 | D80 D85 TY320 SD8 SD23 |
| 14 | T228GA | 228.6 | 76.2 | 71.4 | 76.2 | 71.4 | 60 | 138 | 169 | 219.8 | 169 | 219.8 | 244.8 | 123 | 79 | 48.8 | 77 | 24.5 | 26 | 288 | M24*2 | D155 D150 TY320 SD32 |
Amser post: Ionawr-02-2024