Shop Made Tools

[mattthegamer463]

Made some insert tooling for some TCMT inserts from ebay, working pretty well. Fly cutter tool, external threading tool, boring bar for boring head, and a roughing tool using an indexable end mill insert. That one doesn't have a chip breaker so it doesn't work so well in the lathe. Makes a big birds nest but leaves a pretty good finish, isn't bad for a finishing pass on gummy steel.



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[_Paul_]

Nice work Matt, I also want to make some indexable boring head bars, what tip did you use for yours?

Paul

[MattiJ]

Nice work Matt, I also want to make some indexable boring head bars, what tip did you use for yours?

Paul

Looks like "TCMT VP15TF"
how do I know? because I am also cheap

[mattthegamer463]

Looks like "TCMT VP15TF"
how do I know? because I am also cheap

TCMT110204s, until I find a reason to buy inserts more than $1 apiece I won't, these ones work brilliant. The fly cutter could do with a larger radius on the tip though.

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[MattiJ]

TCMT110204s, until I find a reason to buy inserts more than $1 apiece I won't, these ones work brilliant. The fly cutter could do with a larger radius on the tip though.

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Yeah, and if you want that coating/grade its usually referred as a vp15tf by chinese sellers. Orginally Mitsubishi grade but same same different..

Lately my ebay insert purchases have been crapshoot, they don't even send the model in the pictures but something of same size but with different chip breakers and coatings!
When I find nice type that I like and order 4 boxes of it they send something else.
Well, didn't get what I paid so after refund I have 8 boxes of free inserts to trash on with boring bars.

[mattthegamer463]

Yeah, and if you want that coating/grade its usually referred as a vp15tf by chinese sellers. Orginally Mitsubishi grade but same same different..

Lately my ebay insert purchases have been crapshoot, they don't even send the model in the pictures but something of same size but with different chip breakers and coatings!
When I find nice type that I like and order 4 boxes of it they send something else.
Well, didn't get what I paid so after refund I have 8 boxes of free inserts to trash on with boring bars.

I've done okay so far, thanks for the tip on the specifics for those ones. I have another pack on its way, I hope they match.

[tincture500]

OK. Question about dove tail bits. As a hobbist I have a griz 8 x 16 vs lathe and HF mini mill. I bought a QCTP from AtoZ with a couple tool holders. I would not recommend AtoZ as the are out of business and the QCTP is made from aluminum. I have several 6061 aluminum 1.25 x 2" blocks I am making tool holders out of . My question is that by eye angle appears to be 60 degree, with measurement it appears to be 65 degree. In looking for a dove tail cutter I see both 60 ,55 & 45. I'm tempted to do the 60 . Thoughts. Kentucky Tom

[adatesman]

OK. Question about dove tail bits. As a hobbist I have a griz 8 x 16 vs lathe and HF mini mill. I bought a QCTP from AtoZ with a couple tool holders. I would not recommend AtoZ as the are out of business and the QCTP is made from aluminum. I have several 6061 aluminum 1.25 x 2" blocks I am making tool holders out of . My question is that by eye angle appears to be 60 degree, with measurement it appears to be 65 degree. In looking for a dove tail cutter I see both 60 ,55 & 45. I'm tempted to do the 60 . Thoughts. Kentucky Tom

My first suggestion would be to make a new thread for your question to keep from cluttering the Shop Made Tools thread and to make the question more visible.

[_Paul_]

Indexable Flycutter

An Indexable Flycutter using a commercial 12mm DCMT left hand toolholder and a far eastern R8/22mm shell mount.

For some time I have needed a medium sized flycutter so I have tried to make a fairly rigid item using some propriety components.

Body machined from EN36



Added a shop bought R8/22mm Shell mount









Paul

[_Paul_]

Indexable Flycutter in action

[_Paul_]

Indexable Flycutter DCGT insert

Changed the uncoated Kennametal DCMT insert for a Korloy DCGT aluminum grade one, reduced DOC to 0.002" and upped RPM's to 1800, nice finish,
material is EN1A (1215?)

[gambler]

whats the round ball for?

[TGTool]

whats the round ball for?

To make sure that one face of the workpiece is square with the fixed jaw of the vise, even if the sides are uneven as might happen with a sawn piece of stock.

The sequence I was taught was, 1) face off one of the largest faces, 2) turn to place it against the fixed jaw getting one square corner, 3) turn so the face just finished is against the base of the vise getting two faces now parallel and square with the first, and 4) turn to do the 4th face now that you have basic squareness. To get the last two you do now need an external square reference to get side 5 square with two adjacent faces and then you can finally do the 6th parallel with the vise base and all should be good. You'd use a ball, round stock or other equalizer with the first three cuts to be sure of square accuracy.

[Gary Paine]

This is a travel rest I made to fit my 12 inch Atlas/Craftsman lathe. [img][\img]
[img][\img]
I designed it to accommodate workpieces of diameter down to 1/8 inch and at least ¾ inch at the largest. I wanted rollers and found that to get the maximum benefit from the rollers that I would need to try to catch them at about 8:00 and 1:00 positions. To make that work, the bottom slide was positioned at a 25 degree angle and the top roller carrier was made to swing up and out. The roller carriers, top block and bottom block are all made of aluminum. Aluminum on aluminum, because of the friction, clamps up very securely.
The bottom block is 3.38 x 2.15 x 3.07 inches. Basically just what the rough stock I had cleaned up to be. The top block ended up 3.4 x 1.25 x 3.07 inches. The bearings are ¾ inch OD and ¼ inch ID and run on shoulder cap screws. [img] [\img]

The bottom block clamps to the cross-slide and can double as a slide stop. It may also find use for attaching other items to the carriage in the future. The top block assembly has a captured T-nut and locating ears. Because I had extra material, I also fitted it to the bottom block, extending a bit below the block to allow that material to further support load.
I am also starting a separate thread on this.

[_Paul_]

Gary thats quite ingenious, better than a fixed follower rest has the ability to accommodate varying toolholder/toolpost setups.

Paul