Yn gyffredinol, mae ffa cyswllt angar a ffa rholio silindrical yn addas i'w defnyddio mewn gweithleoedd cyflym; gellir defnyddio ffa rholer wedi'u tapio mewn gweithleoedd cyflymder isel.
Mae gan ffa pêl byrdwn gyflymder terfyn isel ac nid ydynt ond yn addas ar gyfer lleoedd â chyflymder is.
Ar gyfer yr un math o beryn, po leiaf yw'r fanyleb, po uchaf yw'r cyflymder cylchdro a ganiateir. Wrth ddewis y model cario, rhowch sylw i'r cyflymder gwirioneddol yn llai na'r cyflymder terfyn.
Pan fyddwch chi'n dewis y model dwyn mewn cymhwysiad ymarferol, gallwch ddewis yn unol â'r anghenion uchod.
Rhestr Bestseller Cyswllt Pedwar Pwynt
| Enw'r model | Dimensiynau | pwys |
| QJ206 | 30x62x16 | 0.24 |
| QJ306 | 30x72x19 | 0.42 |
| QJ307 | 35x80x21 | 0.57 |
| QJ207 | 35x72x17 | 0.35 |
| QJ208 | 40x80x18 | 0.45 |
| QJ308 | 40x90x23 | 0.78 |
| QJ209 | 45x85x19 | 0.52 |
| QJ309 | 45x100x25 | 1.05 |
| QJ210 | 50x90x20 | 0.59 |
| QJ310 | 50x110x27 | 1.35 |
| QJ211 | 55x100x21 | 0.77 |
| QJ311 | 55x120x29 | 1.75 |
| QJ212 | 60x110x22 | 0.99 |
| QJ312 | 60x130x31 | 2.15 |
| QJ313 | 65x140x33 | 2.7 |
| QJ213 | 65x120x23 | 1.2 |
| QJ314 | 70x150x35 | 3.15 |
| QJ214 | 70x125x24 | 1.3 |
| QJ215 | 75x130x25 | 1.45 |
| QJ315 | 75x160x37 | 3.9 |
| QJ216 | 80x140x26 | 1.85 |
| QJ316 | 80x170x39 | 4.6 |
| QJ217 | 85x150x28 | 2.25 |
| QJ1017 | 85x130x22 | 1.1 |
| QJ1018 | 90x140x24 | 1.45 |
| QJ317 | 85x180x41 | 5.45 |
| QJ318 | 90x190x43 | 6.45 |
| QJ218 | 90x160x30 | 2.75 |
| QJ219 | 95x170x32 | 3.35 |
| QJ319 | 95x200x45 | 7.45 |
| QJ220 | 100x180x34 | 4.05 |
| QJ320 | 100x215x47 | 9.3 |
| QJ1021 | 105x160x26 | 2 |
| QJ1022 | 110x170x28 | 2.5 |
| QJ322 | 110x240x50 | 12.5 |
| QJ222 | 110x200x38 | 5.6 |
| QJ324 | 120x260x55 | 16 |
| QJ224 | 120x215x40 | 6.95 |
| QJ326 | 130x280x58 | 19.5 |
| QJ226 | 130x230x40 | 7.75 |
| QJ228 | 140x250x42 | 9.85 |
| QJ328 | 140x300x62 | 24 |
| QJ230 | 150x270x45 | 12.5 |
| QJ330 | 150x320x65 | 29 |
| QJ1030 | 150x225x35 | 5.25 |
| QJ332 | 160x340x68 | 34.5 |
| QJ232 | 160x290x48 | 15.5 |
| QJ1032 | 160x240x38 | 6.45 |
| QJ334 | 170x360x72 | 41.5 |
| QJ234 | 170x310x52 | 19.5 |
| QJ236 | 180x320x52 | 20.5 |
| QJ336 | 180x380x75 | 47.5 |
| QJ338 | 190x400x78 | 49 |
| QJ238 | 190x340x55 | 23.3 |
| QJ1038 | 190x290x46 | 11.5 |
| QJ1040 | 200x310x51 | 15 |
| QJ240 | 200x360x58 | 28.5 |
| QJ1240 | 200x360x70 | 32.5 |
| QJ344 | 220x460x88 | 78 |
| QJ1244 | 220x400x78 | 45.5 |
| QJ1248 | 240x440x85 | 61 |
| QJ248 | 240x440x72 | 53.2 |
| QJ252 | 260x480x80 | 68 |
| QJ1252 | 260x480x90 | 78 |
| QJ1256 | 280x500x90 | 82 |
| QJ1056 | 280x420x65 | 33.5 |
| QJ1260 | 300x540x98 | 105 |
| QJ1060 | 300x460x74 | 47.5 |
| QJ1264 | 320x580x105 | 130 |
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