10:20Air Brakes Explained Simply :: Service, Parking and Emergency Brakes One & the Same
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TRW
DF4551
Brake disc
Specifications
- Brake Disc Thickness
- 21.9 mm
- Centering Diameter
- 67 mm
- Height
- 52.4 mm
- Minimum thickness
- 19.4 mm
- Outer Diameter
- 315 mm
- Number of Holes
- 5
- Thread Size
- 15
- Bolt Hole Circle Ø
- 112
- Brake Disc Type
- Vented
- Machining
- High-carbon
- Weight
- 10.47 kg
Vehicle Manufacturers
MERCEDES(4 items)
MERCEDES
220 423 03 12
MERCEDES
220423031264
MERCEDES
A 220 423 03 12
MERCEDES
A220423031264
About this part
A brake disc (rotor) is the metal disc that the brake pads clamp onto to slow the wheel.
When the pads press against the spinning disc, friction converts the vehicle's motion into heat, which the disc dissipates; commercial vehicle discs are large and heat-resistant for high loads and repeated braking.
Mounted at the wheel as part of a disc brake. Because braking is safety critical, discs and pads are inspected on schedule and replaced by axle set by a qualified technician.
Frequently asked questions
Does DF4551 have compatible (OE) part numbers?
Yes — it is linked to 4 OE-compatible part number(s), shown in the compatible parts section above.