large slot drill sidelock chuck for lathe

[thehomeengineer]

Hi All

I made this sidelock collet holder to take slot drills with shanks up to 32mm/1.1/4” diameter with a No. 3 Morse taper so I could use it in the tailstock of the lathe.

After drilling a blind hole which needs to have a flat bottom, this tool works well to take the remaining material the drill point has left. I find this a lot quicker than grinding a flat bottom drill or trying to use a boring tool to take this excess material out.

This is handy when several components need to be machined as a large amount of material can be removed ready for finish boring.


metric sidelock collets with ring to identify

imperial sidelock collets

two holes to push sidelock collets out from main housing


The Home Engineer

[DIYer]

Thanks thehomeengineer! We've added your Side Lock Collets to our Machining category,
as well as to your builder page: thehomeengineer's Homemade Tools. Your receipt:

Side Lock Collets by thehomeengineer

tags: collet

[Toolmaker51]

Not trying to highjack thehomeengineer's post, just donating some clarifying terminology.

For those on west side of Atlantic Ocean, in Britain and her many colonies 'slot drill' equal our end mill. Slot drill is a more descriptive name than end mill, certainly can drill; guided by a spindle. Drills do not have actual cutting edges on outside diameter, so they can be used in handheld equipment.
We call these tool-holder bushings. To us, collet signifies retention via gripping fingers, bushing is a cylindrical spacer or adapter body.
Shop or commercially made, the set screw is positioned over flat seen on end-mill shanks.
The location is quite standardized by diameter in keeping with design known as 'Weldon Shank' found in my numerous links...

Machine Tool Shanks (Tapers)

[thehomeengineer]

Hi Toolmaker51
Thank you and sorry if I have created some confussion. Over here (UK) we use both (HSS) Slot drills and End mills. Generally for milling applications. Slot Drills tend to be two or three flute cutters and have the ability to plunge in to the solid workpiece (drilling) and then travel along the work piece (example cutting a blind keyway in a shaft) as one of the flutes is ground over centre. An End mill generally has more than Four flutes and can not plunge in to the workpiece as the cutting edges are equal and do not cross the centre. (example cutting an open ended keyway)
I hope this has cleared up any confussion I will post a photo later of the two types of cutter.
Thank you again
The Home Engineer

[Toolmaker51]

No confusion or apology needed, just a regional thing. I enjoy that wording for engineers & machinists and others generating tangible articles or work varies, but we always get the message across...compared to say politicians, economists, sociologists, theorists, statisticians, inquisitors and the like. A comedian used to joke that certain words should be absolutely universal. Like 'SHARK' for example.

Each of 2, 3, 4 or more flutes are end mills to us, some plunge provided if flutes are as you describe. Generally 'end mill' applies to a cylindrically shanked cutter, fluted at one or both ends, figuratively self-contained. When term 'slotter' 'slitter' 'shell' come up, it's [usually] tool carried on an arbor, whether stub or horizontal type. But then 'back spotface' instantly signifies an arbor is required. Thinking about non-center cutting; they combine a miniature face-mill and slot drill. Then your end milling is our profile cutting, I guess.
Sitting here 70 miles from workplace [physically, next room mentally] cogitating on cutter selection is a acquired technique. Seems my focus starts on 1) material, 2) feature to be cut, 3) quantity to make, 4) which variety machine to use.

[thehomeengineer]

Hi Toolmaker51

Here is the photo of milling cutters and identification

The left in the UK is an End Mill and the Left a Slot Drill


A shell mill is like an End Mill but is bolted to an arbour


Deadlock cutter is screwed to an arbour with a realise mechanism built in the arbour via to dog grub screws one tightening the cutter and the other to release


Side and face and slitting saws fit to a Stub Arbour.


Are the names for these items the same in the US?

The Home Engineer

[Toolmaker51]

Hi Toolmaker51

Here is the photo of milling cutters and identification

The left in the UK is an End Mill and the Left a Slot Drill
Yes, partially. In US both are endmills, capabilities ID'ed by number of flutes.

A shell mill is like an End Mill but is bolted to an arbour
Yes, exactly.

Side and face and slitting saws fit to a Stub Arbour.
Yes, exactly, or that of a horizontal mill. Full length arbors aren't named that I know of, stub is self-explanatory.

Deadlock cutter is screwed to an arbour with a realise mechanism built in the arbour via to dog grub screws one tightening the cutter and the other to release
New to me, 100%

Are the names for these items the same in the US? Yes.

The Home Engineer

Unsure [spelled no clue] on Deadlock, so googled it. LOL, got identical ebay page, at 93 something Euro's as your pic but no description or amplification otherwise. No recollection of screw-on cutters beyond countersinks; I guess a right hand cutter uses left-hand threads, retained by grubs?
Other deadlocks were door hardware. Those I recognize easily, house full of them, circa 1902.

[thehomeengineer]

The clarkson dedlock chuck
The thread that the cutter screws to is able to rotate within the body of the chuck. This thread has a multi start helix and two flats that the screws push against. The right screw tightens the cutter and when the cutter is to be realesed the right screw is loosened and the left tightened to push the helix to break the joint between the mating face of cutter and arbour.
Hope this helps

Dedlock not Deadlock

[Toolmaker51]

The clarkson dedlock chuck
The thread that the cutter screws to is able to rotate within the body of the chuck. This thread has a multi start helix and two flats that the screws push against. The right screw tightens the cutter and when the cutter is to be realesed the right screw is loosened and the left tightened to push the helix to break the joint between the mating face of cutter and arbour.
Hope this helps

Dedlock not Deadlock

Brilliant, solid solution for rigid toolholding. Never seen the like here.
Closest isn't all that close; face and shell mills driven by keys in arbor face, retained by a single screw in center, larger cutters get 4 capscrews.