securing a facing cutter on an arbour

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securing a facing cutter on an arbour

This topic has 8 replies, 5 voices, and was last updated 21 May 2010 at 09:37 by Circlip.

Viewing 9 posts - 1 through 9 (of 9 total)

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17 May 2010 at 22:14 #51775
Ian Welford
Participant
@ianwelford58739
Guys

Bought a 5 tipped facing cutter ( Maydown 80mm ) and made a 27mm arbour to fit the same. Arbor ahs a securing bolt to keeop attached to cutter BUT There is enough movement radially to cause chatter.

I don’t want to make another arbour , so I’m thinking about stopping rotation of the cutter body around the arbour by adding 1 or 2 either securing pins or cap headed bolts to stop it.

Questions are-

1 should the cap head or pins go into the facing flange aginst which the sutter sits?

2 Alternatively they could go into the 27mm central boss of the arbour.

I am favouring 1 as then if they shear at any time I can easily redrill but anyone tried it?

Arbour is nive free machining steel. I know I shoudl have made an arbour with 2 flanges to fit in the drive gaps on the cutter but didn’t see how I could do it at the time without dismounting then remounting the arbour on the 3MT tape which it’s attached to.

Don’t think loctite will stand the temperatures generated whilst cutting.

Thanks

Ian

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17 May 2010 at 22:14 #5069
Ian Welford
Participant
@ianwelford58739
18 May 2010 at 10:16 #51791
macmarch
Participant
@macmarch
I presume that your cutter is of the shelllmill type. Does it not have a keyway in the bore? For this size of cutter with the ability to remove large amounts of material at one pass it needs one. I would suggest that you fit a cap head onto the stub mandrel and cut a recess in the bore of the cutter to locate on the head. hth

ray
18 May 2010 at 11:20 #51794
JasonB
Moderator
@jasonb
Does it not have a keyway along the top face, this can engage on the drive tabs on the end of your spindle nose, looks like most of their cutters have this keyway. Or the flange on the arbour should have some form of drive pins likethese or if its MT 3 then the pins need to extend to engage on the spindle like these

Edit , reading it again you do have the large top keyway and an MT taper. I would drill & ream the arbour flange for a couple of dowel pins, these can be retained with grub screws from the side of the flange bearing onto flats on the pins. This can be done with the arbour assembled and will transfer the rotational forces from the cutter to the spindle with no risk or turning the MT Taper under load

Jason

Edited By JasonB on 18/05/2010 11:24:54

Edited By JasonB on 18/05/2010 11:26:42

Edited By JasonB on 18/05/2010 11:32:19
18 May 2010 at 11:50 #51796
Circlip
Participant
@circlip
Mill a couple of round ended pockets into the sides of the larger diameter of the arbour and let in a couple of pegs retained with C/S allen screws. Similar effect to JasonBs post but the drive is on a flat surface.

Send yer E-mail via P/M

Regards Ian.
18 May 2010 at 21:27 #51811
Ian Welford
Participant
@ianwelford58739
Thanks for the ideas. I like the idea of milling a couple of pins in then securing with grub screws. My idea of cap heads doesn’t give as much contact area but is faster!

Didn’t know about arbours with transmission pins Jason- thanks for that .

I think I’ll sleep on it then try the inset pins. If that fails I can always mill the pockets as you say Circlip.

Should I use silver steel and harden the pins or just use EN1A as is ?

Despite the chatter I found it works really well at about 800rpn and 25thou cuts! Mind you the steel chips come off blue, as did my language when one found it’s way into my glove!

Thanks again guys.

Ian
19 May 2010 at 10:38 #51830
Terryd
Participant
@terryd72465
Hi Guys,

Just a light hearted two ‘pennorth but why are you discussing ‘bowers’, ‘pergolas’ and ‘restful flower covered lattices or trelliswork’ in an engineering publication, surely it should be in a gardening one. That is an arbour!

Or do you mean ‘arbor’ i.e. ‘a machine spindle to support a cutting device’ ?

Regards with respect,

Terry
20 May 2010 at 22:12 #51917
Ian Welford
Participant
@ianwelford58739
OOps

Isn’t an ‘Arbour somewhere to keep boats as well ?

Circlip- did you get e mail?

Ian
21 May 2010 at 09:37 #51930
Circlip
Participant
@circlip
Sent a reply yesterday at 10.59.17am to the Yahoo address you gave me, re-forwarded today (Friday) at 08.33.18 to same address, perhaps you got the M/E server disease??

Regards antother Ian.
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