Burnerd Multisize Collet Chuck Regrease

Hi,

I have recently accuired a Burnerd Multisize Collet Chuck KC15 key operated type which had been sitting in a cupboard for all time! .

Is it possible to regrease the bearings? there is a flat screwdriver slot in the nose cone and im wondering if thats how it is removed for a regrease.

Has anyone tried this I have contacted Burnerd and they say they have no information on the chuck ?

Any info would be great.

Thanks in advance

Regards

Richard

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Tht's rather odd; cosidering that they list it on p75 of the catalogue

Sorry; haven't got mine any more, and it never needed attention.

MichaelG.

Hi, Michael

Yes I know its strange, they sell it but when it comes to asking about it they have no info on it?, dont know how they get on as a company?.

Hopefully someone would know what the screwdiver slot on the nose ring is for, I would think it has ball bearings in the nose cap that would benefit from a grease up as it feels a bit dry.

Hopefully someone has done this??

Regards

Richard..

They don't seem to provide any information on them even the type with a lever - they do give the hinge point for those, or at least one of them but that's about it. Any further and it's a case of dismantling and finding out for yourself.

John

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Richard Clark 1

I have a KC15 but I must admit I didn't realize there were bearings in it which might need attention. There is a sectional drawing in Westbury's Metal Turning Lathes which suggests that there is indeed a bearing in line with the screw-in cap; I could scan this for you if you think it might help.

As you probably know, the collets themselves come with the warning "DO NOT DISMANTLE THE COLLET FOR ANY REASON".

Well my collets certainly dont have that warning on

they are quite easy to take to bits once you know how

springs off

move one leaf at a time into the centre

move slightly back to the rear

leafs slide out then

easy on the larger sizes

more difficult on the smaller ones

Ian Parkin:

Thanks for the dismantling instructions which I will file along with the warning.

I thought the text of the warning leaflet might be of interest to someone and created an album for a scanned JPG of it but could not persuade the website to accept the upload; I may try again later when I am feeling stronger! The warning reads like a warranty disclaimer and I have no doubt that a competent ME can safely dismantle if necessary.

I use the shop vac to clean my collets and have had no need to remove the blades. They are lubricated with Rocol Ultraglide spray to which I am seeking a more economical alternative as the price of a single can is now bordering on the prohibitive.

Hi to everyone,

Yes Ega a scan would be great if thats possible, I will also keep the info on dismantling the collets thats handy info especially if they get swarfed up a bit in use.

Its a shame that makers are so useless, I am assuming the scredriver slot is for holding the nose cap on and I would think the bearings would be single balls in grease.

Yes a diagram exploded pic would be very helpfull if its not too much trouble for you.

Also lucky for me is the collet chuck is a backplate mounting type which is very handy as the backplate taper has seen better days, I think someone has tried to remachine the taper!! and made a crap job of doing it so mounting on a new backplate also has the advantage of tapping the original burnerd collet taper into perfect alignment and nipping up the screws.

By the way I have never used Rocol Ultraglide spray? but I know Rocol stuff is pricey could you not use a dab of Iso30 spindle oil on the blades?. definately not way oil as this can gum up over time.

Regards

Richard..

Richard Clark 1:

[Repeat summary of first posting which disappeared into a dark hole!]

Rocol claim Ultraglide is "Designed to proved smooth and precise movement of slideways, colletts (sic) and chucks" and, having used it for decades I can say I have never noticed any gumming up.

I shall be glad to send you such iinformation as I have and have PMd you about this.

Good luck with the chuck.

Hi Ega,

I have just Pm you and I see the Rocol stuff seems to be the best for that application I will have to look into that too.

No I meant to say the Iso 68 way oil could gum up collets, I am cleaning mine at the moment in Parafin and then soaking in Spindle oil (ISO30) to get the oil into every bit.

Best Regards

Richard..

Note earlier thread on Burnerd Multisize EC collet dismantling.

Muzzer:

Thanks for the reference to the collet dismantling thread - very interesting and I hope it remains of academic interest only as "gum" is horrible stuff. I have tried various solvents including thinners and generally end up reluctantly using some form of abrasion.

Richard Clark 1:

Thanks for the clarification.

Paraffin is apparently the correct maintenance cleaner although I like the ultrasonic idea and there may be better modern paraffin equivalents. The Jacobs rubber encapsulated collets may be better from this point of view - I don't know if they are compatible with the Burnerd chuck though.

Took my chuck to bits to photograph its construction

Remove the large screw from the outside on the ring...fairly tight large well fitting screwdriver needed

Hold chuck over a basin or rag and rotate body holding ring with screw hole downwards

about 30 balls will drop out

or you could fish out with a small magnet

then the ring will pull off clean and refit

Ian

Slotted screw cap does indeed give access to the ball bearing ring inside the closing piece. Screw is only lightly nipped in place.

I have used Rocol Ultraglide Slideway oil to lubricate, keeps it smooth to operate. Place aperture at top, drip oil in to fill, hold closing piece still and rotate backplate, you can see the balls go by and the oil enters the raceway, add again if necessary, replace cap and nip.

Good to have further hard information. I'm guessing that the function of the balls is to allow greater torque to be applied to the closing ring as with a ball bearing three jaw drill chuck.

And presumably the need for maintenance arises from the ingress of suds and oil loss through centrifugal action.

KWIL, I have been feeding my Willson on Ultraglide for some years and now I have another use for it. We gather that there is no use in asking PB for their preferred lubricant.

Thanks, Ian

Very useul reference photo.

MichaelG.

For further info, if anyone is looking at the hydraulic version, there is no oil in them! They have some type of plastic (its a bit silicone rubber like) in them formed into the same shape as the cavity and tightening the chuck key forces a screw plunger to apply pressure to the plastic "filler" closing the collet mechanism.

Mark

Hi to everyone,

Well im glad I started this thread now, its great information It seems lots of collet chucks are going to get a new grease up!.

Question to Ian -----So do the balls fall out from the removed screw slot? and I assume they have to be inserted back through the hole to refit. The photos are superb Ian thanks

Yes I can confirm the info sent to me via Ega has a message stating

Clean collets with Parrafin to remove fine swarf collected around the blades after cleaning they should be dipped in a rust preventative oil before being stored or used.

I have today cleaned all 12 collets that came in the set by immersing in parrafin and then allowing to soak in myford spindle oil and the results are great the spring action of the plates was abit dry feeling before, now they are silky smooth

I am going to strip and regrease the chuck in the morning, and in answer to the question from Ega about what lube they suggest, on the original email I asked for info on how to lube it and they said we have no info on the chuck but you could use Pratt burnerd grease, so they want to sell the grease but give no info on how to do it?

Best Regards to everyone.

Richard

Quick update Actually I meant not regrease but clean and re oil the chuck as Kwil says, I think if you were to strip the chuck and pack with grease you would never get the balls in or out .

So looks like a clean and re oil today.

Richard..

Help!! Have just bought a P&B Multisize KC15 D1-3 for my Bantam. There is 7 thou run out on each test bar tried in five collets, now...lost the will. Tried everything, but finally clocked the cone the collets seat into in the chuck. Yep 7 thou run out!!!!! Clocked the outer on the chuck body and its true so not a mounting issue. Came from eBay. Before I raise a dispute, could it be an issue with the internal bearing? Not enough or no balls? Advice gratefully received.