Can you recommend a small chuck for centre drills?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Hopper on 01/07/2018 07:44:14:

Posted by James Jenkins 1 on 01/07/2018 07:17:01:…

..why oh, why, did Drummond not make the tailstock hollow so you can knock tapers out!?!).

??? M-type tailstock spindle has a hole all the way through it …

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Other Drummonds are available

… I don't know what model James has.

MichaelG.

[Michael GilliganParticipant @michaelgilligan61133]

[James Jenkins 1Participant @jamesjenkins1]

Hi all,

I have an 1930's Drummond M, which has a solid tailstock end (presumably as designed). The Myford M has a hole through the shaft. I had thought about drilling a hole through, I could borrow the tail stock shaft from the other one to do it.

James

[HopperParticipant @hopper]

My 1937 M-type has the hole right the way through. Never heard of one without it. Otherwise, how would one extract the drill or chuck? Other than a drill-press style slot in the side of the spindle. Believe it or not, that tiny MT1 taper WILL grip phenomenally hard.

Just out of interest, what is the serial number on your M-type? Mine is 3798A (located on the tailstock end of the one of the bed shears.) Which puts it at circa 1937 according to the lathes.co.uk numbers listing. Other pre-war giveaways are the horn (actually antler) handles on the leadscrew and carriage handwheels and of course the beloved flat belt drive. (Which I have upgraded by using poly-V belt straight on the flat pulleys and it works a treat.)

The reason I ask is just wondering if yours is an early pre-1924 M-type, which possibly (but I'd be surprised) had no through hole in the tailstock.

[HopperParticipant @hopper]

Posted by Michael Gilligan on 01/07/2018 07:57:30:

Glad to see I am not the only one who carries boat anchors, err old lathes, home in the back of his small hatchback. Is it yours? Or are you just an admirer?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Hopper on 01/07/2018 08:59:55:

Glad to see I am not the only one who carries boat anchors, err old lathes, home in the back of his small hatchback. Is it yours? Or are you just an admirer?

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'tis mine … another 'project' now taking up valuable space in what should be a workshop.

[no, I'm not planning a workshop in the back of the Suzuki]

I've always admired the round-bed Drummonds, and when this one was offered, I couldn't say no.

Interestingly, it has the original 'cast in situ' white metal bearing supporting the tailstock barrel.

MichaelG.

[peak4Participant @peak4]

Posted by James Jenkins 1 on 01/07/2018 07:17:01:

H I will use the second one to make a centre drill holder in the same fashion, probably knurling them to help get them out the tailstock (why oh, why, did Drummond not make the tailstock hollow so you can knock tapers out!?!).

James

Just a thought, rather than knurling, how about a fine thread? That way with a suitable collar and a C spanner, they should self extract.

Bill

[Andrew TinsleyParticipant @andrewtinsley63637]

The old round bed Drummond that I have, didn't take much refurbishment. It is far more accurate than I ever expected. Far from a boat anchor! now has anyone got a back gear for them?

Andrew.

[HopperParticipant @hopper]

White metal tailstock bearing. Wow. They were thorough in those days. No thoughts of planned obsolescence or "engineered dissatisfaction" (marketed today by Apple as an "upgrade"  ) in those days.

Does the round bed have a through hole in the tailstock spindle for knockout purposes?

I have to say, they are a cobby looking piece of equipment. Very steampunk indeed. Every workshop needs one!

Edited By Hopper on 01/07/2018 12:04:30

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Hopper on 01/07/2018 12:03:58:

White metal tailstock bearing. Wow. They were thorough in those days. No thoughts of planned obsolescence or "engineered dissatisfaction" (marketed today by Apple as an "upgrade" ) in those days.

Does the round bed have a through hole in the tailstock spindle for knockout purposes?

I have to say, they are a cobby looking piece of equipment. Very steampunk indeed. Every workshop needs one!

.

No through-hole in the tailstock … if I recall correctly.

[ will check later ]

I first fell in lust for the Round Bed in the mid 1970s, when a friend acquired one.

Then < sigh > Mr Mole, of N.Mole &Co. in Watford showed me the one he was saving for his retirement … It was brand new, in its wooden packing crate, and still covered in the protective grease.

They are fabulous little machines.

MichaelG.

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https://www.model-engineer.co.uk/wp-content/uploads/sites/4/documents/drumm-4-man.pdf

http://www.lathes.co.uk/drummondroundbed/

Edited By Michael Gilligan on 01/07/2018 12:29:50

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Gilligan on 01/07/2018 12:18:44:

Posted by Hopper on 01/07/2018 12:03:58:

Does the round bed have a through hole in the tailstock spindle for knockout purposes?

.

No through-hole in the tailstock … if I recall correctly.

[ will check later ]

.

Oops … there is indeed a "Hole, quarter inch, knockout drift for the use of"

MichaelG.

[David TParticipant @davidt96864]

Not all tailstocks are created equal; the standard Myford ML4 tailstock had a through-hole, but mine was solid and self-ejecting. I rather prefer the knock-out hole as winding the tailstock all the back was quite tedious.

[Author]

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