Johnson DC Magnetic Drum Brakes
- Metric as DIN standard code: DL
- Imperial as A.I.S.E. standard code: SMAA
- Also non-standard drum sizes and base fixings
- Short stroke DC tractive type, all fabricated steel construction
- Resin encapsulated coil with Class F insulation
- Optional replaceable coil arrangement
- 100% continuously rated up to 40ºC
- Airgap dust and drip protected by neoprene qaiter
- Terminal Box IP55 standard enclosure
- Self adjusting mechanism (compensating for wear)
- Mechanical release lever
- Limit switches to monitor release/ set or wear
- Hydraulic override by remote pedal
- Special materials and finishes as required including high integrity specifications
- Separate enclosed control units for DC or AC supplies
| BRAKE MODEL |
DRUM DIA. “D” |
MAGNET SIZE | TORQUE MAX. |
WEIGHT |
|---|---|---|---|---|
| mm | Nm | kg | ||
| GDA100 | 100 | DA100 | 32 | 11 |
| GDA160 | 160 | DA160 | 80 | 28 |
| GDA200 | 200 | DA200 | 213 | 46 |
| GDA250 | 250 | DA250 | 362 | 64 |
| GDA315 | 315 | DA315 | 565 | 100 |
| GDA400 | 400 | DA400 | 1487 | 246 |
| GDA500 | 500 | DA500 | 1900 | 264 |
| GDA630 | 630 | DA630 | 5885 | 620 |
| BRAKE MODEL |
DRUM DIA. “D” |
MAGNET SIZE | TORQUE MAX |
WEIGHT |
|---|---|---|---|---|
| in | Lbft | Lb | ||
| SMAA4 | 4 | DA100 | 24 | 25 |
| SMAA6 | 6 | DA160 | 59 | 62 |
| SMAA8 | 8 | DA200 | 157 | 101 |
| SMAA10 | 10 | DA250 | 267 | 141 |
| SMAA13 | 13 | DAH315 | 626 | 220 |
| SMAA16 | 16 | DA400 | 1097 | 542 |
| SMAA19 | 19 | DAH500 | 2620 | 816 |
| SMAA23 | 23 | DA630 | 4000 | 1367 |
| SMAA30 | 30 | DA710 | 9000 | 1500 |