Engineer for Headstock Overhaul – Pillar Drill/Tapper

[Daniel Cole 1Participant @danielcole1]

Hi,

I've just recently bought an old pillar drill which has excessive spindle play, i would like to use it for drilling and tapping small diameter holes, so obviously play needs to be at a minimum.

The bearings (bronze) in the headstock are worn, and the spindle looks to have slightly eccentric wear in one spot (contact point of upper quill bearing), the wear on the rest of the spindle seems minimal. I don't currently have access to the tools required to machine and replace the bushes in the headstock and make the spindle true.

Also, I would like to fit a V-belt pulley instead of the round belt one fitted at the moment.

I was wondering if anyone knew someone that (or they themselves) would take this kind of job on at a good price?

I've attached some images:

for size reference, total length of spindle is around 30cm

[Daniel Cole 1Participant @danielcole1]

[Daniel Cole 1Participant @danielcole1]

I'm in the London area, but can post as it's only a few kg. (Sorry, would have added this to above post but didn't see the edit post function until now)

Edited By Daniel Cole 1 on 30/03/2014 13:54:23

[Ian S CParticipant @iansc]

Daniel, I'd tend leave it with the round belt, you can get heat joinable plastic belting in a wide number of sizes, and is ideal for these type of machines, it will save you the trouble of making a new pulley set, I imagine that there are two jockey pulleys to guide the belt from the back of the head, down to the motor, and that may have another set of three similar to the spindle pulleys. Ian S C

[Daniel Cole 1Participant @danielcole1]

Ian,

I don't have the jockey pulleys, but I do have a 3 step V pulley; so I was contemplating just mounting the motor behind the headstock with the usual 3 speed setup. I'll look into the round belt setup, trouble is space is at a premium so i thought the v-belt setup might be more compact.

[Ian S CParticipant @iansc]

With the jockey pulleys, the belt goes straight down behind the column, and you could pass it through a hole in the bench, and mount the motor under the bench. Mounting the motor on the column will make it (in my opinion), a bit top heavy, but that may be no problem. Ian S C

[Mike Young 2Participant @mikeyoung2]

That’s about an hours work for John Stevenson, including a couple of tea breaks.

[Author]

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