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October 7, 2018
Because I Can Part Three
KEITHFENNER.COM
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Removing the material on new Main bearing caps to match block bore on Audi 2.1 L 5 cylinder. Part Three, Where the bit hits the metal, on half a bore, the Kenax custom main bearing caps.
Sponsorship at;
http://turnwrightmachineworks.com/
As promised, here is more info on the cap materials and the makers.
The caps are made from SSAB Toolox 33 tool steel. I run it dry and with
a lot of feed when making the caps, the chips turn purple when speed is
right.
Toolox 33 - Mechanical Properties +20°C
Hardness (HBW) 300
Hardness (HRC) ~29
Yield strength Rp0.2 (MPa) 850
Tensile strength Rm (MPa) 980
Elongation, A5, (%) 16
Impact toughness, Charpy-V (J) 100
Machining parameters for turning (imperial):
Vc (ft/min) 492-656
Feed rate (fn) min-max
Insert grade P25 (in./rev) 0.008-0.016
https://www.ssab.com/products/brands/toolox/products/toolox-33
http://www.kenax.fi/
https://www.instagram.com/kenaxbillet/
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