what are bearing pullers made?(material 40CR Alloy Steel)
40CR Alloy steel
Material: GB 40CR Alloy steel(SAE-AISI 5140 steel )
Chemical composition of 40Cr steel
rade C Si Mn Cr Ni(≤) Cu(≤) P(≤) S(≤)
40Cr 0.37-0.44 0.17-0.37 0.5-0.8 0.8-1.0 0.3 0.03 0.035 0.035
Physical property of 40Cr
Sample blank size (mm):25
The first quenching heating temperature (ºC):850; coolant: Oil
Second quenching heating temperature (ºC):-
Tempering heating temperature (ºC):520;
Tensile strength (σb/MPa): ≥980
The yield point (σs/MPa): ≥785
Elongation (δ5/%): ≥9
Section shrinkage (ψ/%): ≥45
3-jaw gear puller
40CR alloy steel is used to produce bearing pullers because it provides them with a very strong structure that is able to withstand wear.
Bearing pullers need to be able to remove bearings, gears or pulleys without becoming easily worn or damaged.
2. Heat Treated
heat treatment
Bearing pullers are heat treated for increased wear and strength.
3. Chrome plated
Chrome plated
The bearing pullers are chrome plated to resist corrosion. Corrosion is when iron reacts with oxygen and forms a reddish-brown oxide that we know as rust. When steel corrodes it deteriorates and eventually decays over time.