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/N = Nylon wheels; /S = Steel wheels;
Nylon wheels are quieter and avoid the need to grease track to reduce wear. Hence their carrying capacity is greater. For automatic doors halve the carrying capacity and use nylon wheels if possible.
Track Type | Hanger | Wheels A | B | Length C | Thickness D | E | Max. Door Capacity |
---|---|---|---|---|---|---|---|
290 | 57/290/SS | 3-3/8" | 1-1/2" | 7-3/8" | 1/8" | 1-1/2" | 300 lbs. |
301 | 57/301/SS | 5-3/8" | 1-1/2" | 7-3/8" | 1/8" | 2" | 600 lbs. |
Track No. | Hanger No. | Wheels A | C | Length D | Thickness E | Width F | Door Weight Capacity |
---|---|---|---|---|---|---|---|
290 | 57K/N | 3-7/16 | 1 | 5-1/2 | 1/16 | 1 | 300 lbs. |
301 | 57A/S | 5-5/8 | 2-3/8 | 7-5/16 | 1/16 | 1-1/2 | 600 lbs. |
301H | 57A/N | 5-5/8 | 2-3/8 | 7-5/16 | 1/16 | 1-1/2 | 1000 lbs. |
305 | 57C/S | 6-3/8 | 2-1/2 | 7-5/16 | 1/16 | 1-1/2 | 1500 lbs. |