View Full Version : What is this boring head used for?
jhovel
18th September 2011, 01:48 AM
I picked this up today. It is obviously an adjustable (69mm to 86mm) two-point boring head. The shank is 4MT.
It has an ingenious adjusting mechanism that keeps both cutters bith parallel and evenly extended. It also has a very fine scale (0-60) but I haven't had a micrometer on it yet to determine if these are thousands or decimals of millimeters.
The two cuttings edges are tungsten carbide tipped.
There is some etched text on both sides but it's no legible.
Anyone seen one like it?
Bryan
18th September 2011, 09:45 AM
David Brown History (http://www.davidbrown.com/history.php)
C-47
18th September 2011, 10:04 AM
As linked by Bryan these look like David Brown reamers. Have not used such but suspect opposing blades could present a few problems, suspect 3 would be better.
Engineeringsupplies.co.uk David Brown Adjustable Floating Reamers (http://www.engineeringsupplies.co.uk/175mm-190mm-david-brown-reamer-p-1836.html)
Stustoys
18th September 2011, 11:10 AM
The man that put the DB in Aston Martin. He sure got around.
jhovel
18th September 2011, 11:26 AM
Wholy moley!
This is the one I have - obviously an older model, but this size:
Engineeringsupplies.co.uk David Brown Adjustable Floating Reamers (http://www.engineeringsupplies.co.uk/698mm-825mm-sl13-david-brown-reamer-p-1891.html)
Hope I don't wear the cutting tips out!
Engineeringsupplies.co.uk David Brown Adjustable Floating Reamers (http://www.engineeringsupplies.co.uk/698mm-825mm-sl13-blades-david-brown-reamers-p-1959.html)
Thank you both for finding me the reference!
Joe
RayG
18th September 2011, 12:22 PM
Hi Joe,
What a find, :2tsup: I wonder if it was ever used to ream cylinders for a DB 6 ( whatever the James Bond one was ) ... :)
Regards
Ray
PS. Thanks for the great time yesterday.
matthew_g
18th September 2011, 01:08 PM
David Brown History (http://www.davidbrown.com/history.php)
Thankyou so much for posting that link. It's amazing to read. It turns out most of the equipment I had on the farm was built by or had components made by David Brown:2tsup:
4-6-4
23rd September 2011, 10:12 PM
Greetings I have come on to this thread a bit late but hope I can help. This looks like a floating head reamer. I used them at Vickers Ruwolt back in the early 70,s. The ones I saw the blades had a lateral movement as well as the radial micrometer settings. They gave an exceptional finish. I have not seen a tungsten carbide version. Yours 4-6-4