Product Attribute:
Material:Gray Iron
Position:Rear
Brake surface diameter:419.1
Brake surface width:193.8
Pilot Diameter:216.7
Bolt circle diameter:285.75
Number of bolt holes:10
Bolt hole size:20.6
Overall depth:268.9
weight:40-80kg
Applicationt:
bpw trailer, semi-traielr
Production Description:
Brake drum details
1)Material: Gray iron HT250, Meet the American Standard G3000, Also offer ductile cast iron.
2) Designer: Technical expert take in charge of making drawings for the sample offered by client.
3) Test requriment: Each piece should be strictly tested, Eg. Brake Drum Blance Test, Round Jumpness Test .
4) Casting: Automatic production line including sand mixing, moulding and pouring.
5) Machining: Brake drums are produced by CNC machining.
6) Inspection: Advance test equipment including CMM, tensile strength testing machine, hardness tester, spectrometer, parallel tester, etc.
7) Chermical composition:
C:3.0-3.3% Si:1.6-1.9% Mn:0.7-0.9% P:<0.12% S<0.12%
8) Mechanics performance:
Main body degree of hardness:163-255HBS
Testing rod tensile strength:>=220mpa