Cutting/boring bush

Cutting/boring bush

This topic has 10 replies, 5 voices, and was last updated 18 August 2017 at 19:58 by JasonB.

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18 August 2017 at 17:35 #312754
Col21
Participant
@col21
What sort/shape should a cutter be boring out a copper coated bush in a milling machine. Was going to use a piece of 6mm hss.
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18 August 2017 at 17:35 #18619
Col21
Participant
@col21
18 August 2017 at 17:40 #312755
Nick_G
Participant
@nick_g
.

When you say coated. How thick is the coating and what is the base material under the coating.?

I ask this as if it's not a very thick coating you may be able to get under it in the first pass.

Are you also sure the bush is copper.?

Nick
18 August 2017 at 17:42 #312756
David Standing 1
Participant
@davidstanding1
And, following on from Nick's post, are you sure it isn't an oilite bush?
18 August 2017 at 17:54 #312760
Col21
Participant
@col21
It's a copper coated small end bush. I assume it'll be steel. Only got to remove about 0.4mm
18 August 2017 at 17:56 #312762
JasonB
Moderator
@jasonb
What size is the bore as that will determine what sort of tools will fit down the hole.

Do you have a boring head?
18 August 2017 at 18:15 #312771
Col21
Participant
@col21
50mm bore by about 50mm deep. Yeah a vertex adjustable boring head which has 18mm holes
18 August 2017 at 18:27 #312774
JasonB
Moderator
@jasonb
Piece of 18mm bar drilled across at the end to take your 6mm HSS toolbit and then cross drilled for a grub screw say M5 to retain the bit. Should be nice and rigid which will help keep the bore parallel.
18 August 2017 at 18:34 #312775
Col21
Participant
@col21
Thanks yeah that what I was thinking but what shape should I grind the cutter to get the best result. I.e. Large radius , relief and speed etc

Edited By Rocketman on 18/08/2017 18:59:45
18 August 2017 at 18:38 #312778
HOWARDT
Participant
@howardt
Is it a Glacier bush, or whatever they call themselves these days. They make steel backed bushes with various bearing materials. If it is then it can be pushed out and a replacement fitted, no matching necessary.
18 August 2017 at 19:58 #312795
JasonB
Moderator
@jasonb
Click the "988 photos" under my avitar and look in the "sketches" album, there are 4 photos there of a between ctrs boring bar numbered bb1-4 they show a suitable cutter profile.
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