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Manufactured/Badged by:
Sears | Craftsman
*

Machine Specifications
Machine Class: Wood Working Machinery & Metal Working Machinery
Machine Type: Drill Press
Machine Size: for 15.5 Craftsman 150 DP
Submitted By: Steve White
Machine Specifications
Description/Model: Vari-slo Speed Control
Date of Manufacturer: 1950s or 60s
Serial Number:
Last Updated 1/23/2012 1:57:15 PM

Comments:
Just bought it on BOYD on OWWM.org got this in from Matt in NY (thanks Matt). it is really grimy and needs a good cleaning. There are no signs of rust, dings or cracks in the metal and the bearings (4) need replacing. I plan on a full restoration for it. I have heard that the weak point is the collar, that attaches to the Drill Press (DP) column, cracks if you move the speed control lever while the DP is not running and the belts slips easily if it is not adjusted right. Not sure how it works yet, but i do know that the middle flange on the pulley moves up and down which adjusts the pulley ratio.
I found the manual from a thread on OWWM.org. Hear are the links to the manuals:
http://vintagemachinery.org/pubs/detail.aspx?id=3034
http://vintagemachinery.org/pubs/detail.aspx?id=3013
I have not seen anything done on this accessory so I thought it was a good submission.
Update: 1-11-2012
finished installation of it and it looks really good. i kind know of how it works so ill try to explain it. first the lever with its dog leg pushes and pulls the whole contraption to change the speed. the middle two pulley's middle flange moves up and down making the pulley larger and smaller. in the photos below shows this movement. it dose not like to start up in high speed, the motor jumps up and the motor belt slips.

Photo 1:

Comments: all the parts that came in the mail
Source: pic via my iPhone
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IMG Code

Photo 2:

Comments: here is a veiw of the linkage all shined up
Source: pic via my iPhone
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IMG Code

Photo 3:

Comments: pulleys: The middle flange moves up and down which adjusts the ratio
Source: pic via my iPhone
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IMG Code

Photo 4:

Comments: front installed and cleaned up
Source: pic via my iPhone
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Photo 5:

Comments: here is the vari-slo in the fast postion
Source: pic via my iPhone
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IMG Code

Photo 6:

Comments: here is the vari-slo in the slow postion
Source: pic via my iPhone
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IMG Code