problem with pillar drill

[Terry BlushParticipant @terryblush79782]

Evening all I'm new to this site as I have a problem.

 

Does anyone have a drill press and know the ins and outs with them?

 

I have a wee B&Q powerbase one and lately when I have it running its been vibtating badly. I have worked out that this is due tothe front pulleys that turn the chuck, is liftingon the square drive shaft. I push it back down with some force and all is well for a few minutes then it lifts again.

 

There is a set screw to hold the pulley to the inner sleeve that sits on the square drive shaft but I don't see any screw to bite the drive shaft..

Any ideas?

 

Many thanks in advance.

[Terry BlushParticipant @terryblush79782]

[Gordon WParticipant @gordonw]

I've just been looking at my similar m/c, don't really know what you mean. The square shaft has to slide up and down as the chuck is lowered, is it stuck ? Would suggest taking off the pulley block and see whats going on , maybe just needs clean and oil ? Maybe a bearing come loose, will prob. be able to loctite back in if so, but just guessing. Thought- the belt is on the same grooves ? Let us know.

[Terry BlushParticipant @terryblush79782]

 

 

Edited By Terry Blush on 24/08/2014 18:09:02

[Terry BlushParticipant @terryblush79782]

I understand the square rod drives the chuck is meant to slide up and down inside the pulley now, but why would the front pulley lift up? It lifts a good 40mm or so while the machine is running

[John BromleyParticipant @johnbromley78794]

The pulley should be held in place by a grub screw, I have a Clarke version of the same drill.

From memory it is in one of the pulley grooves. Tighten it up and all should be well.

John

[Steven VineParticipant @stevenvine79904]

Yeah, what John said. Its a 3mm hex head, in the 2nd groove down on mine.

Steve

[Terry BlushParticipant @terryblush79782]

Yep the grub screw is there and tight to the inner sleeve which is lined up to the flat spot. However that inner sleeve is what is sliding up

[Terry BlushParticipant @terryblush79782]

[Steven VineParticipant @stevenvine79904]

Crikey. That short shaft should not come out of the bearing.

Here is a picture of the assembly from underneath (the quill assembly has been removed). This picture is a shot of the underside of the top bearing.

The shaft may need to be modified and then pressed in again so it it a tight fit. It has to transfer a lot of torque. Some of the more knowledgeable chaps will provide solutions.

Steve

[Michael HornerParticipant @michaelhorner54327]

Hi Terry

Afraid I can't help with direct experience but I found a manual on the Grizzly Tools website which may give you some ideas **LINK** . On page 28 of the document 34 in the Adobe reader shows an exploded diagram. It seems to show some internal and external retaining clips.

Best of luck. Michael.

[Michael HornerParticipant @michaelhorner54327]

Posted by Steven Vine on 24/08/2014 21:16:52:

Crikey. That short shaft should not come out of the bearing.

Here is a picture of the assembly from underneath (the quill assembly has been removed). This picture is a shot of the underside of the top bearing.

The shaft may need to be modified and then pressed in again so it it a tight fit. It has to transfer a lot of torque. Some of the more knowledgeable chaps will provide solutions.

Steve

Hi Steve

Just guessing but I think the grub screw in the pulley transmit the torque into square tube then into the spindle. I think the pulley should be a press fit in the bearings, a bit of low strength loctite should hold it in place. Can't find the fingers crossed icon.

Cheers Michael.

[Steven VineParticipant @stevenvine79904]

Thanks Michael. That makes more sense than the conclusion I came to. It's worth trying the simple loctite solution first. I just had a walk round to the shops, and was thinking, there and back, about how easy it would be to make another shaft so that it was a tighter fit.

Steve

[Terry BlushParticipant @terryblush79782]

Oh joys lol I have some metal epoxy that I could use to stick it back in with. It's weird that it just started to vibrate loudly.

Thank you gents for your time and help.☺

[Ian S CParticipant @iansc]

The best thing to stick it together would be Bearing Grade Loctite(can't remember the number), with that the bearing can be removed with a normal bearing puller, it will also fill quite a big gap. I used it on the top bearing of my Vertical Milling machine's top bearing, after it spun in it's housing.

Ian S C

[rooferParticipant @roofer]

Do remember though its a ting tong special and ive had my fair share of far East precision and its merits of things not fitting.

[Michael GilliganParticipant @michaelgilligan61133]

Terry,

I agree completely with Ian's approach

641 is probably the most suitable grade.

MichaelG.

[Terry BlushParticipant @terryblush79782]

Cheers again, I'll have a look for some 641 and hopefully that'll do the trick.

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