Speed Auxiliary Mill Spindle
easy to make auxiliary high speed spindle that
will allow you to utilize very small diameter
end mills without a high probability of
breakage. Spindle RPM's of most home shop
milling machines are simply too slow for end
mills smaller than around 1/16" (1.6mm).
Depending on the motor used and the pulley
ratio, speeds of 8,000 RPM and much higher are
available. The spindle is designed to accept
3/16" shank diameter end mills which is
common for end mills from 1/32" to
3/16" diameter. The spindle body is
mounted in a standard 3/4" or 7/8"
R-8 cullet. The drive belt is a standard low
cost "O" ring. The unit is adaptable
to a wide range of modifications to suit any
user. The plans set also includes an oversize
computer grade precision lower ball bearing, a
high quality upper ball bearing and a bearing
preload wave washer.
The plans set consists of 5 sheets of
drawings, 1 sheet of helpful notes, spindle
bearings & preload washer.
"Your drawings and instructions are very
clear and concise. My background was in aviation and
aerospace manufacturing and I really appreciate prints
that are clearly presentable." - Jim Headberg,
Headberg Aviation (Wellington, Florida)