Boring bar/head

[Anonymous]

Posted by Chris Evans 6 on 09/04/2017 10:00:12:

……..and Whalupta (Spelling?) boring heads.

Wohlhaupter; like this UPA4 boring and facing head:

They're still in production, albeit in the if you have to ask how much you can't afford it category.

Andrew

[JasonBModerator @jasonb]

Outof the two RDG ones I would go with the 80mm long one provided your hole is not more than about 50mm deep.

You can quite easily make bars like the ones shown in Andrew's post and as mentioned by Chris. Just some 12mm bar drilled across to take a bit of HSS (old ctr drill etc) and a grub screw at 90 deg to it.

[petro1headParticipant @petro1head]

Been having aread, probably too much

Not sure if you agree but some say go for CCGT tips and avoid TPG inserts?

So I am temped to get the 50mm set from ARC that I linked to on the first post and use the supplies bars for roughing. I will then get one of these – **LINK** and some of these tips **LINK**

Am I on the right track?

Opps, we must have been posting at the same time Jason, are those tips ok?

Edited By petro1head on 09/04/2017 13:20:21

[JasonBModerator @jasonb]

I've not tried a lathe type boring bar in the head so can't comment on how they perform but the CCGT tips are very good on aluminium when used in teh lathe so should be just as good in the boring head

[Michael GilliganParticipant @michaelgilligan61133]

A related question, if I may:

The boring head that I have for my BCA is a little unusual, in that the tool-holder can [optionally] be angled to increase the sweep-radius of the tool. … This is a useful feature, but, I think. it requires grinding a specially shaped tool to suit the angle.

Can anyone suggest a versatlle tool-shape that would be convenient ?

[ one obvious choice would be a circular 'button' insert ]

Thanks

MichaelG.

[Neil WyattModerator @neilwyatt]

I've got a new strapline:

"Model Engineers' Workshop … where boring is interesting"

Neil

[petro1headParticipant @petro1head]

Posted by Neil Wyatt on 09/04/2017 14:27:29:

I've got a new strapline:

"Model Engineers' Workshop … where boring is interesting"

Neil

LOL

[petro1headParticipant @petro1head]

Is it worth getting Sumitomo ​tips over the cheaper ones sold by Chronos **LINK** or am I just throwing money away

Edited By petro1head on 09/04/2017 15:42:16

[petro1headParticipant @petro1head]

I think my head will explode looking at indexable bars and different tips

I found a set sold by RDG but they have TCMT tips **LINK** These are the same tips as the Chronos set that Jason linked to.

Again, if available I would be better with TCGT tips for alluminium?

BTW this site is good for identifing what the tip letters mean **LINK**

[BazyleParticipant @bazyle]

MichaelG, one of the ways to handle the variable angle ones is to use a few standard angles like 30, 45 degrees and grind accordingly. Not quite what you asked I know.

I wonder with Wohlhaupter that each time I see a boxed one with nicely fitted accessories the head itself is just left to rattle around. They only have two sizes of shank for the UPA4 so it wouldn't be hard to cater for that neatly.

[JasonBModerator @jasonb]

Posted by petro1head on 09/04/2017 16:12:56:

I found a set sold by RDG but they have TCMT tips **LINK** These are the same tips as the Chronos set that Jason linked to.

Again, if available I would be better with TCGT tips for alluminium?

I'd try the supplied inserts and if you don't get on with them then get some TCGT from here for example, last on page.

Bit of paraffin as a lube will help give a cleaner cut.

[petro1headParticipant @petro1head]

Thanks Jason for your help. My head is a bit clearer now

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Bazyle on 09/04/2017 16:36:14:

MichaelG, one of the ways to handle the variable angle ones is to use a few standard angles like 30, 45 degrees and grind accordingly. Not quite what you asked I know..

.

Fair comment, Bazyle

Thanks

MichaelG.

[Les Jones 1Participant @lesjones1]

I made these two holders so that I could use HSS tools in my boring head.

 

 

Les.

Edited By Les Jones 1 on 09/04/2017 18:46:00

[JonParticipant @jon]

Currently using a shortened 42mm protruding Glanze 1/2" in first link now £98 the only tool in that lot usable, these are TCMT or similar and leave a far better finish in a boring head than CCGT and the like. Standard length the tool was unusable with way too much flex but now find can enlarge 25mm holes 6mm on dia to 31mm dia one pass in 6082 to 42mm deep, just feel for whats happening. Finishing cuts I draw the bar out to leave a finish.
However I do use proper branded inserts of distinction ie Sandvik TCMW, never tried the Sandvik TCGT and Sumito TPGT which should perform better.

CCGT and similar always find it deflecting the tool too much as it imparts more sideways pressure on the tool.

Worth noting buy inserts for the job at hand, rakes and coatings differ. If unavailable everything had to date meant for cast works good on 6082.

[ronan walshParticipant @ronanwalsh98054]

Just to throw another stick through the spokes, what do you think of the type of boring head that the tool swivels from a central point, the bridgeport type i think they are called.

[petro1headParticipant @petro1head]

[RANT MODE}

Well I ordered the items from RDG Tools and oh boy what a joke that company is.

I had decided to order this **LINK** however I thought its was confusing as it states "R8 SILVER BORING HEAD (50mm DIA) NEW METRIC" but when you read the description it states "EITHER 3MT OR R8 SHANK (NOT INCLUDED)".

I sent an email Sunday, asking if the arbour was included, hoping I would get an early reply Monday morning. I did not (not a problem) so I rang and spoke to a lad called Ben who confirmed that it did not include the R8 arbour and that I need to order this **LINK**. He confirmed that the items were in stock and woulkd be delivered the following day, so I went back on line and ordered them, This was at about 9:30am.

I then get an email at 15:30 from a guy called James answering the mail I sent on Sunday, saying "Yes it does. The "Not Included" part is a mistake."

So I rang and spoke to James to find out what was going on. He confirmed that the boring head included an arbour and that the arbour I had ordered was, in fact, the wrong one! This had been picked up at the packing stage. He informed me that I had missed the deadline for delivery for Tuesday and would ring me on Tuesday to confirm my order. James rang Tuesday saying that it was all sorted and was being dispatched that day. He also confirmed that he had spoken to his boss about the problem re the wording and said they were going to revise it.

Its now 5.30 and no sign so I check my email to see an email from RDG statinmg that my order has been dispatched today for delivery Thursday! Grrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Obviously I am anoyed. First because or their cockup and second because I have no appology, thirdaly their website is still wrong

So, first and last time for me. I will just stick to ARC who have always been excellent

 

Edited By petro1head on 12/04/2017 17:33:46

[not done it yetParticipant @notdoneityet]

Don't ya just love it. METRIC with an imperial drawbar thread!

[petro1headParticipant @petro1head]

Yeh, its always puzzled me why that is

[Anonymous]

Probably isn't metric, just the same screw with different numbers on the dial. And if it's anything like my cheapo boring head the socket head grub screws will be BSW – and made of cheese. First thing I did was replace my grub screws with US/UK made ones.

Andrew

[SillyOldDufferModerator @sillyoldduffer]

PetrolHead's extremely brave. Criticism of anything Myford related usually results in the offender being cast into the outer darkness with their epaulettes ripped off!

(RDG own Myford now don't they, or did I imagine that?)

Dave

[petro1headParticipant @petro1head]

Posted by SillyOldDuffer on 12/04/2017 20:25:04:

PetrolHead's extremely brave. Criticism of anything Myford related usually results in the offender being cast into the outer darkness with their epaulettes ripped off!

(RDG own Myford now don't they, or did I imagine that?)

Dave

Pah! Bring it on

[ronan walshParticipant @ronanwalsh98054]

I have to say i've bought quite a bit off rdg over the years and never had a moments trouble with them. Andrew said to ditch the cheapo screws on the far eastern boring heads, and thats a very good idea. The ones they come supplied with are pure rubbish.

 

Edited By ronan walsh on 12/04/2017 21:06:52

[Graham SwalesParticipant @grahamswales]

8mins 57 secs… "I have managed to do some very good work with this even before all the improvements…"

This after an initial recommendation not to buy the junk but to spend a bit more on a used American item.

So what is the price of a few cap screws and a bit of time??

Interestingly in my day job I have recently purchased two similar boring heads and one is being used 24-7 on a production job. The "completely wrong" cutting tools are still in use and receive a few seconds lapping on a diamond lap once a day. Cutting circa 50mm bores in cast iron components.

Second head – purchased "just in case" is still in its box.

For the price they are a no brainer. In our case it has also released a CNC mill as the bore is a second op which can be done easier and quicker manually.

Grum

[petro1headParticipant @petro1head]

All sorted, finally arrived yesterday.

I am sure I read somewhere that its a good idea to replace the set screws as the chineese ones are like cheese?

[Author]

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