Gents,
I'm going to buy a set of indexing tools for my small Myford lathe. The set I'm looking at includes,
12mm BORING BAR
SIDE/FACE RIGHT HAND
SIDE/FACE LEFT HAND
45 DEGREE CHAMFER TOOL
50 DEGREE CHAMFER TOOL
2 POINTED TURNING TOOLS
So here's my dilemma, i can order the set With a choice of insert type, either TCMT, CCMT, DCMT and then different numbers of each which I think is the nose radius. I'm struggling to find the information on the difference between each type and I hope you can suggest which type I go for.
The Myford lathe is small and only 3/4 HP so it's all light work with light cuts. I'm only just starting out and haven't really done much turning but the materials I could see myself using regularly would be Ali, mild steel, brass, stainless.
Cheers
John
(01-07-2017, 04:12 PM)Old Minger Wrote: [ -> ]Gents,
I'm going to buy a set of indexing tools for my small Myford lathe. The set I'm looking at includes,
12mm BORING BAR
SIDE/FACE RIGHT HAND
SIDE/FACE LEFT HAND
45 DEGREE CHAMFER TOOL
50 DEGREE CHAMFER TOOL
2 POINTED TURNING TOOLS
So here's my dilemma, i can order the set With a choice of insert type, either TCMT, CCMT, DCMT and then different numbers of each which I think is the nose radius. I'm struggling to find the information on the difference between each type and I hope you can suggest which type I go for.
The Myford lathe is small and only 3/4 HP so it's all light work with light cuts. I'm only just starting out and haven't really done much turning but the materials I could see myself using regularly would be Ali, mild steel, brass, stainless.
Cheers
John
John,
Could you post a link to that set of tools you're considering. That would help immensely.
What size shank are you looking at for the lathe tools?
Ed
(01-07-2017, 04:31 PM)EdK Wrote: [ -> ] (01-07-2017, 04:12 PM)Old Minger Wrote: [ -> ]Gents,
I'm going to buy a set of indexing tools for my small Myford lathe. The set I'm looking at includes,
12mm BORING BAR
SIDE/FACE RIGHT HAND
SIDE/FACE LEFT HAND
45 DEGREE CHAMFER TOOL
50 DEGREE CHAMFER TOOL
2 POINTED TURNING TOOLS
So here's my dilemma, i can order the set With a choice of insert type, either TCMT, CCMT, DCMT and then different numbers of each which I think is the nose radius. I'm struggling to find the information on the difference between each type and I hope you can suggest which type I go for.
The Myford lathe is small and only 3/4 HP so it's all light work with light cuts. I'm only just starting out and haven't really done much turning but the materials I could see myself using regularly would be Ali, mild steel, brass, stainless.
Cheers
John
John,
Could you post a link to that set of tools you're considering. That would help immensely.
What size shank are you looking at for the lathe tools?
Ed
Ed
Here is the link to RDG tools and the sets available in 12mm shank size. Sorry it's not a live link but I'm posting this from a bloody iPad, these things drive me mad!
I'm heading back to the old country for a few days and was going to pick these up. I've dealt with RDG before and they are good and their import tools appear to be reasonable quality, similar to Shars stuff. Also I've still got some of the old money left in my piggy bank so I won't be getting reamed with the current exchange rates.
http://www.rdgtools.co.uk/acatalog/Index...Shank.html
Cheers
John
John,
Personally, I'd pass on that tool set. I'm not sure why you'd need a 45 degree and 50 degree chamfering tool when you can just turn the 45 degree tool if you need a 50 degree chamfer. Plus, I have no idea what they mean by "2 pointed turning tools". You'll probably never use the "side/face left hand". Or at least very seldom. My advise would be to buy two better quality right hand tools that take CCMT inserts. You can chamfer with that tools also. Then purchase additional tools as needed. Don't forget the inserts. Don't cheap out on those.
Are you sure your lathe can handle 12mm (1/2") shank tools?
Ed
Left and right are the only insert tooling I use. An old brazed carbide threading tool ground back to a 90 works for chamfering.
Most of my tooling uses triangular T inserts but I found some diamond shaped ones and a holder C type that have shown promise for heavy cuts with the less fragile point.
I think (someone correct me) triangular are the most common, you can flip them so if you don't break the tip off you have 6 cutting edges. Been a while since I ordered any but think its 4 size (fits in a 1/2 inch circle) the next number is the thickness then the 3 is the tip radius in 64'ths. The ones in the link show metric sizes Im guessing, not sure if they will hold inch size inserts more readily available here.
I've had the best luck with the smallest radius I can get, larger ones tend to chatter. I use a lot of HSS and bearly break the tip with a stone so the small radius makes sense.
There bet I really muddied the waters for you now.
Ed posted while i was typing, I agree you'll probably use the left hand one the most but I like the right hand one for facing and occasionally to a right hand shoulder.
Depends on the insert. All of the ones I have can only be used one way - unless you regrind it.
(01-07-2017, 06:02 PM)f350ca Wrote: [ -> ]I agree you'll probably use the left hand one the most
I think you mean the right hand which is angled towards the chuck, to the left. It make no sense why they call it a right hand tool when it angles to the left but I'm sure there's a good reason. Ken could educate us but he bailed.
Ed
Stay away from those package sets, as they do not hold the insert very securely.
Keep an eye out on ebay as there are bargains to be had. A SCLCR style turning tool will do the bulk of your work. As it uses a 80° rhomboid insert (CCGT or CCMT), it can be used to both turn and face without changing the setup. Those inserts can also be used in boring bars and it makes good sense to minimise the various types of insert that you need. What tool post are you using?
Given the size and HP of your lathe, you will need to use positive geometry inserts (like those I listed above). These are single sided inserts.
To start with, you might be better off to get some HSS blanks and grind your tools. You can do this on your belt sander.