Photo Index - Sears | Dunlap - 6643 Heavy Duty Polishing Head

Machinery Photo Index

Manufactured/Badged by:
Sears | Dunlap
Chicago, IL

True Manufacturer:
Unknown Manufacturer, *

Machine Specifications
Machine Class:	Wood Working Machinery & Metal Working Machinery
Machine Type:	Grinder, Bench
Machine Size:
Submitted By:	Brian Kachadurian

Machine Specifications
Description/Model:	6643 Heavy Duty Polishing Head
Date of Manufacturer:	Estimate Early 1940s
Serial Number:	none
Last Updated	9/12/2016 11:37:10 AM

Comments:

>>Machine<<
I believe it is a Dunlap model 6643 'Heavy Duty' polishing head.
The earlier versions are Companion models 2875 or 6643.
The body is cast iron, 8¾" tall.
The pulley and flanges are machined from solid steel.
The shaft has ½-24 right and left hand threads.
The left side of the shaft (RH thread) is longer and originally came with a 3/8" drill chuck (missing here).
The bronze shaft bearings are protected by steel cups at the body.
Steel oil plugs are pressed into the body.
The original blue paint can be seen inside the body.
This machine would easily take up to 8" buffing and wire wheels.

>>History<<
I purchased this polishing head on 8Sep2006 at a local used tool store.
I suspect that this polishing head was made by Millers-Falls for Sears, but can't confirm at this time.

September 2010: completed assembly.
Walnut shell blasted the casting (covered the bearing openings with blue tape).
Primer-Krylon gray
Finish-Krylon Oxford Blue Satin
Reversed the shaft so the RH threads are on the right side.
Added a 3/8" keyless chuck to the RH threaded end of the shaft (not easy to find in ½-24 threads).
Coarse and fine wire wheel to clean the steel parts.
Polished the flanges, cups, pulley and chuck with a Scotch-Brite EXL deburring wheel (grade 00 fine).

Photo 1:

Comments: Front 3/4 view
Source: Canon S230 with flash in my basement workshop.

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Photo 2:

Comments: Rear 3/4 view
Source: Canon S230 with flash in my basement workshop.

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Photo 3:

Comments: Front view-restoration complete
Source: Nikon CoolPix with flash in basement workshop

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Photo 4:

Comments: Rear view-restoration complete
Source: Nikon CoolPix with flash in basement workshop

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