12:32CDL Air Brakes Test 2024 (MOST Common Questions and Answers)
Driving Academy | CDL Truck Driving School
Watch on YouTubeSpecifications
- Brake Disc Thickness
- 45 mm
- Centering Diameter
- 194 mm
- Height
- 135 mm
- Minimum thickness
- 37 mm
- Outer Diameter
- 434 mm
- Brake Disc Type
- Vented
- Bolt Hole Circle Ø
- 220
- Number of Holes
- 10
- Thread Size
- M16x150
- Braking/Driving Dynamics
- for vehicles with ABS
- Fitting Position
- Front Axle
- Weight
- 17.961 kg
Component Manufacturers
MERITOR(3 items)
MERITOR
68323736
MERITOR
68325977
MERITOR
MBR9016
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12:32
9:44CDL Class A FULL In Cab Inspection and Air Brake Test 2023 - Pass Your CDL Trucking Road Test
Driving Academy | CDL Truck Driving School
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5:57About 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 NCA1231.20 have compatible (OE) part numbers?
Yes — it is linked to 3 OE-compatible part number(s), shown in the compatible parts section above.