LFA Arbors....hiw are they used?

DiscoDan

H-M Supporter - Gold Member
H-M Supporter Gold Member
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Jul 16, 2018
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These were thrown in with some taps I bought but I have no idea how they are used. They are both 5/8" straight shank and one us ST3 and one is ST2. How are they used?
 

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Arbor for a drill chuck. Jacobs taper 2 and 3.
 
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