Part 62 Headstock Quill spindle shaft
This item is only sold as part of an assembly and is UNAVAILABLE to order
The pictures show both the SINGLE bearing and TWIN bearing design items. The quill housing designs for these are DIFFERENT
There are a small number of early twin bearing quills out there which cannot have the inner bearing changed successfully. The shaft itself is formed in two pieces and locked together with a roll pin arrangement. There can be unacceptable play in the shaft once re-assembled so if this is the design in your machine I recommend replacement with either 518210 NEW or 518210r RECONDITIONED units
Please do not try to convert your single bearing quill to a 2 bearing type by simply pushing a loose bearing onto the inner shaft. (Don't laugh I have seen 3 of these "conversions") which all ended with the loose bearing disintegrating due to overheating. The resulting carnage as the failed bearing comes apart can wreck your electric motor as the metal particles and swarf get into the armature and windings and short-circuit the motor.
QUILL SHAFT PART 62 ASSEMBLY HISTORY
In regards to design Shopsmith went through a large number of changes to the quill shaft assembly over the years before settling on the latest current design of parts 59 and 62.
The shaft itself (Part 62) is a connection of solid and splined steel rods which are pressed together during manufacture.
Originally the shaft had a single bearing at the spindle knob end of the housing (Part 59) and at the splined end has the sliding drive hub assembly (Part 57) This design had an amount of "wobble" with the quill on full extention. This was not too much of a problem on drilling or horizontal boring where the shaft was extended but on Lathe operations it did cause some issues. The design was upgraded to a twin bearing design in the late 80's or early 90's.
The first design of the twin bearing type placed a bearing onto the rear end of the solid shaft before pressing the two ends together. Unfortunately this method forgot to take account of the fact that the inner bearing center diameter was smaller than the splined shaft and subsequently mean it was impossible to remove this bearing after assembly.
The next design was assembled with a cotter pin arrangement to hold the splined and solid shaft together allowing removal of both bearings when required. This was not very successful as there was too much movement in the assembly.
The current design involved a new Part 59 housing with provision for larger inner and outer bearings. This allowed a larger inner bearing with a bigger internal diameter which could now slide over the splined shaft and lock into position at the end of the solid shaft. The outer Bearing was also increased in size at this time. This new arrangement now allowed both bearings to be removed at end of life and simply upgraded and replaced.
It is mainly due to all these changes that Shopsmith do not offer Parts 59 or Part 62 as individual replacements. Today the most expedient replacement if you have one of the earlier designs is a current complete assembly, either refurbished or new.
You are encouraged to phone for advice in order to get the right part.
Please use the link under CONTACT US
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