Devlieg microbore WORLD'S BEST BORING BARS

[Karl_T]

The recent discussion about Everede boring bars prompted this thread.

I just scored a set of Devlieg microbore bar bars for my second shop:

DEVLING MICRO BORE SET SSMBS108 STRAIGHT SHANK 7/16” - 1.000" + EXTRA TIPS-USED | eBay

<p>NICE DEVLING MICRO BORE SET SSMBS106 STRAIGHT SHANK 7/16, 1/2, 5/8, 3/4, AND 1.00”. THIS SET COMES WITH WRENCHES AND EXTRA TIPS. </p><br /><p>IMPORTANT!!! —— PLEASE NOTE THIS IS NOT, REPEAT, NOT A COMPLETE SET…IT IS MISSING THE 3/8 BAR.</p><br /><p>PLEASE SEE ALL PHOTOS</p>

www.ebay.com

I have a HUGE selection of their bars for my NMTB40 mill. For decades (before huge CNC) many shops had a jig bore machine using these. They can go cheap on eBay. here's just a quick example. I did not spend time shopping for a great deal:

3 Devlieg Microbore Flash Change NMTB40 Boring Heads | eBay

<p>This set includes three DeVlieg Microbore Flash Change NMTB40 Boring Heads, perfect for workholding and toolholding in CNC, metalworking, and manufacturing industries. The brand has a reputation for high quality and these heads are no exception. They are a great addition to any workshop.</p>

www.ebay.com

This system is FAR MORE RIGID than any other offer. The bars have replaceable grindable inserts and an accurate method to make bore adjustments, see this pic from their catalog:

 

[toprecyler]

Appreciate the post on feedback for these boring bars. I have several that I got in a large box of cat 50 mill holders. Wasn’t sure I was going to like them, but will have to try them out now, and be on the lookout for more inserts for them.


Sent from my iPhone using Tapatalk

 

[Karl_T]

I drawers full of inserts and all the other assorted small parts. It is on my honey's do list to start selling these.

 

[mmcmdl]

I'll second the DeVlieg bars . Used them for years . One of DeVlieg's specs on their jig mills was max TIR of less than .0002 on the spindle at maximum extension . We had a wall of 6 machines . Not CNC but point to point milling .

 

[BWS Arms]

I have never seen one until now. How large of a bore will they do?

 

[mmcmdl]

How large of a bore will they do?

Depends on how big the bar is . DeVlieg is big machine and take BIG BARS if needed !

 

[toprecyler]

I drawers full of inserts and all the other assorted small parts. It is on my honey's do list to start selling these.

Keep me in mind. I have several bars, but no extra inserts. I have not looked at them close enough to know what sizes I would need. I really need to get my big mill going first, before I really need to look at getting more inserts/ tooling, but always thinking about it.


Sent from my iPhone using Tapatalk

 

[Karl_T]

I have never seen one until now. How large of a bore will they do?

My largest bar will do a 6" bore. Pretty sure larger ones are available. They also make ones for extremely deep bores. Got a few that are 12" long or deep.

 

[BWS Arms]

I saw that the smallest machine weighs something like 14k and the largest over 40k. Also read that it was capable of holding .0005” over 6’.

 

[mmcmdl]

Very accurate machines . The angle plates can weight over a ton each . Some of ours went to NASA , APL and the big one went up to Tool and Die Specialties . They had a dial-trol system that was the pre-cursor to nc , point to point milling .