By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by allandale

Lathe tool question

All Topics | Latest Posts

Search for:  in Thread Title in  
John Hall 720/10/2017 13:32:44
1 forum posts

ive just bought a Warco 250v and I’ve been looking at sets of indexable tools to use with it.. I’ve been looking on EBay and it’s a bit of a minefied with so many to choose from..can anyone suggest where to start? Also are the inserts interchangeable or does each tool require a certain one?..Also.. am I looking for tools with a 12mm shank?

Cheers John

Mick B120/10/2017 16:40:36
187 forum posts
8 photos

You have to look at the locating nest for the insert in the tool body. I've got 2 indexable Glanze tools that I bought years ago. They were 8mm, but I milled them down to 6,35 so they'd fit the tool packing pieces I'd made for the Myford, but they transferred to my Warco 250V without mods.

You can use smaller sizes than 12mm with suitable packing, which you can make from 1/2" or 12mm square section steel or alli, milled to an 'L' section so as to support the indexable tool at the correct CH.

I have a suspicion that, despite my 250V being metric, the CH is actually 0.500" above the floor of the toolpost, so 12mm tools might conceivably need a thin packing shim. I say this because my packing pieces made as above are .250" thick on the foot of the 'L', and 1/4" square HSS toolbits come to CH with little or no grinddown on top.

Whichever tool you buy, make a note of the size and angle of the insert location - when you look on the Bay, sellers of inserts usually post dimensions. I didn't know anything when about them when I started, and I haven't bought any yet that won't fit.

Iain Downs21/10/2017 08:20:13
313 forum posts
120 photos

Might I suggest that you consider one of the mainstream providers? Certainly as a starting point. You will find good descriptions and a known quality. As an example (no connection, but very happy customer) ARC have a good range.

If you get one or two from such a source and get started, you can look to eBay later on.

Iain

Vic21/10/2017 08:51:58
1332 forum posts
1 photos

May I suggest:

**LINK**

SillyOldDuffer21/10/2017 09:50:49
2172 forum posts
468 photos

Trouble with sets is they don't always contain what you want, so you have to be a bit careful. The last set I bought uses 4 different inserts, has no left-handed tool, and has 3 hefty boring bars I'm unlikely to use. I managed to identify the inserts it uses but it wasn't easy.

If I were you, I'd follow Iain's advice and buy individual holders from Arc; they helpfully stock the range of holders most likely suit hobbyists and inserts to fit them, making it easier to choose the right combinations. Arc also sell inserts that fit their holders. Not everyone else does!

Have a look at this page . Arc summarise what they sell. I'd suggest:

  • An SCLC-R 95° holder, taking a rhombic insert. This is the most useful general purpose turning tool and it carries the most useful general purpose insert. It can face and turn.
  • An SCLC-L 95° holder. This tool is the left-handed version of the SCLR-R, that is it cuts from left to right. I don't use mine very often, but ...
  • An An SSDC-N 45° holder taking a square insert. Square insert are stronger than rhombics and are good for roughing out. They face and turn (right/left and left/right) but they cannot cut into a corner. They are excellent for putting chamfers on turned work. This is my second most used tool.
  • A parting/grooving tool. Various on offer from ARC. I've settled on the NCIH blade type which uses GTN inserts. Parting off can be a challenge! Whatever tool you use, it will work better in a rear tool-post.
  • For boring internal holes, one or more S-SCLC-R 95° boring bars in different diameters. They take the same insert as the SCLC-R 95° and the SCLC-L 95°. I own two: a small one to fit in small holes, and a bigger one for boring larger holes. A small boring bar will cut big holes, but they tend to flex. So it's better to use bigger boring bars on bigger holes, but not essential.

Tool-holder Sizes. I would buy one size down from your tool-holder and shim it to height. (ie. buy 10mm holders to fit a 12mm tool-post)

Arc inserts & holders vs Sumitomo? Sumitomo are 'better' but more expensive. For what it's worth I'm using Arc holders and inserts and - for hobby use - not had a problem with them. Silver inserts are better for non-ferrous metals, but I find the yellow ones usually work OK.

One thing I can't find in the Arc range are threading holders and inserts. Threading inserts are 'special' in that they have an angled point to match the thread type (metric and imperial are different angles), and come sized to suit the thread. (You can't cut big deep threads with a tiny insert.)

Arc also carry a decent HSS set; this has one each of common tools including threading. I use mine quite often despite mainly being an insert fan.

Dave

PS No connection with Arc, I just think they've made it easier to buy inserts and holders than the competition.

duncan webster21/10/2017 14:04:52
avatar
1240 forum posts
22 photos

Carbide inserts are great for shifting a lot of metal, but the slightest chip to the tip costs £s. I use HSS in a tangential tool holder from Eccentric quite a lot, and am planning to make one for my little Cowells. There's nothing magical about tool grinding, give it a go and save a lot of money.
​If you do go down the carbide route, buy a holder so you can use the obtuse angle of the Rhomboid tips. Soon pays for itself by letting you use all 4 corners, and that corner is stronger anyway. For plain turning the chip is directed away from the work unlike the sharp corner.

colin hawes21/10/2017 14:21:54
411 forum posts
18 photos

For most jobs on a hobby lathe HSS Is more than adequate, cheaper than insert tools, and you will need them anyway for making various shapes. I normally only use tipped tools on tough steels or cast iron to speed things up a bit. As Duncan says tool grinding is quite easy after a little practice and it's a skill that will serve you in well in the future. I also make boring bars from silver steel and they work very well at the proper speed. Colin

Howard Lewis21/10/2017 19:31:26
921 forum posts

Made up a Tangential Turning Tool from an article in MEW, a long time ago, to take 1/8" toolbits. So impressed made up a larger holder to take 5/16". Used nearly all the time, (use a holder for chipped CCMT0604 tips that uses the 100 degree corners, for roughing. The chipped ones come from the Boring Bar often used).

The grinding fixture is simple to make and does a good job.

Will soon come to the end of the first short bit of toolbit, so quite economical.

Easily set to centre height (especially if you make a setting tool) and when sharp will remove 0.0005" a side and leave a good finish with a 0.0025"/rev feed.

Try one!

Howard

thaiguzzi22/10/2017 05:09:34
avatar
282 forum posts
86 photos

From my past industrial days of owning two Colchesters to owning my little Boxford in semi retirement the last 14 years I've gone the opposite way. I still have 2 or 3 insert tools, but virtually everything I use constantly nowadays is HSS. Better finish, better DOC.

richardandtracy22/10/2017 10:13:36
avatar
660 forum posts
7 photos

To answer the question, instead of offering confusing and contradictory alternatives; I bought a 10 mm set of 7 tools from the seller of this 12mm set on e-bay (I'm on android and can't paste a live link, sorry). The tools in the 12mm set are included in the more comprehensive 7 piece 10mm set :

263153026439

It comes with enough tips to be useful, and under my usage, I have no complaints at all. The finish is adequate, but not decorative. Given the price of inserts sourced in the UK, even if nothing local fits when you wear those ones out, buy another set including holders. Goes against the grain, but it's economically viable.

Regards

Richard

Edited to add, it appears e-bay item 263006086269 , the one where I got my 10mm set has been expanded to add a 12mm set. I would buy another set from the seller if I needed to.

Edited By richardandtracy on 22/10/2017 10:37:49

Michael Gilligan22/10/2017 10:47:07
10219 forum posts
443 photos
Posted by richardandtracy on 22/10/2017 10:13:36:

To answer the question, instead of offering confusing and contradictory alternatives; I bought a 10 mm set of 7 tools from the seller of this 12mm set on e-bay (I'm on android and can't paste a live link, sorry).

[ ... ]

Edited to add, it appears e-bay item 263006086269 , the one where I got my 10mm set has been expanded to add a 12mm set. I would buy another set from the seller if I needed to.

.

Allow me, Richard:

**LINK**

http://www.ebay.co.uk/itm/10-Types-Shank-Lathe-Turning-Tools-Holder-Boring-Bar-CNC-Carbide-Tips-Inserts-/263006086269

MichaelG.

richardandtracy22/10/2017 17:38:11
avatar
660 forum posts
7 photos
Posted by Michael Gilligan on 22/10/2017 10:47:07.

Allow me, Richard:

**LINK**

http://www.ebay.co.uk/itm/10-Types-Shank-Lathe-Turning-Tools-Holder-Boring-Bar-CNC-Carbide-Tips-Inserts-/263006086269

MichaelG.

Thanks for that. Isn't android 4.4 fun, even if you can ignore the childish nicknames?

Regards

Richard.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Email News - Join our newsletter

Love Model Engineering? Sign up to our emails for the latest news and special offers!

Latest Forum Posts
Support Our Partners
Ausee.com.au
Expo Tools July 14
SPG Tools October Seventeen
Shapiro
Merdienne London Show 2018
Reeves 2000
Eccentric Engineering
Warco
PaulTheCad
emcomachinetools
Allendale Electronics
ChesterUK
TRANSWAVE Converters
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

Visit the Model Engineer
Exhibition website

Model Engineer Exhibition