Friday, August 8, 2008

Ellen Bohannan's "Super Fan" (SUPERFAN)

Super Stirling Engine Fan built by Ellen Bohannan at Tennessee Technical Center in Memphis, TN

Thursday, January 10, 2008

Jerry's Original High Speed Auxiliary Mill Spindle

An 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.