Horizontal Milling Arbor

[RICHARD GREEN 2Participant @richardgreen2]

Does anyone know where I can buy an arbor for a horizontal milling machine, that is 1" diameter and 26" long from the flange to the outer end, with a 40 INT taper,

New or used would be OK, I've tried some tool suppliers and ebay , but cant seem to find one.

Richard.

[RICHARD GREEN 2Participant @richardgreen2]

[BazyleParticipant @bazyle]

I assume you saw this shorter one from Gloster but their supplier might do other lengths.

**LINK**

[RICHARD GREEN 2Participant @richardgreen2]

Hello Bazyle, Yes I've tried them, but the 20" is the longest they sell,

I've got a 20" arbor and a 22" arbor, but need the 26" one to do one job.

Richard.

[RICHARD GREEN 2Participant @richardgreen2]

Here are a few pictures to show you what I'm doing,

These gears are for a 6" Burrell traction engine, the large one in the pictures is 19"diameter, and fills the capacity of the Elliott U2 mill,

The largest gear I've got to cut is 21" diameter and weighs at least 200 lbs (100 kg) , and won't fit in the mill,

I've got a larger TOS FA3A mill that will take 250 kg on the table, but I still need the longer arbor, so the gear blank can fit in the mill without touching the main casting or the outer support bracket.

Perhaps someone might have another way round my problem ?

Richard.

[Anonymous]

I bought a 1-1/4" arbor for my horizontal mill from Home & Workshop Machinery, but I assume you've tried them?

Two ideas spring to mind:

1) Machine an extension piece to fit the existing arbor, or make your own arbor.

2) Go the whole hog and use the undercutting method, although it would be a lot of work to make the accessories needed! Like this:

Regards,

Andrew

[RICHARD GREEN 2Participant @richardgreen2]

Andrew,

I think making my own arbor is probably my best option at the moment,

The TOS mill has got a 40 INT spindle taper, and I have adaptors to convert this down to 3 and 4 morse, so I could make a new arbor with a morse taper and drawbolt thread in the end, and screwcut the other end for the nut, I could make it as long as required.

Richard.

[Anonymous]

Richard: Clarkson Dedlock holders seem to be cheap and in abundance on Ebay at the moment. I bought an INT40 version for £10. It means cutting an internal thread in the end of the arbor, but they may give a more positive drive than a Morse taper. I'm guessing your gears are around 4DP?

Regards,

Andrew

[RICHARD GREEN 2Participant @richardgreen2]

Andrew,

These gears are 6DP, but the differential bevels will be 4DP, I have a dedlock chuck so thats a possibility,

On a USA website someone used an ER 40 collet chuck to hold the horizontal shaft , but I was a bit concerned that the shaft could move in the collet during use, the large nut on the end of the arbor would be trying to pull the shaft out of the collet,I've got to cut 124 teeth on the gear so don't want anything to move or come loose, and mess the job up.

Richard.

[John Stevenson 1Participant @johnstevenson1]

Use a ER40 collet chuck and a straight shaft with thread on for the retaining nut and then tap the other end and fit a stiff washer on equal to the minor diameter of the collet you are using, minor diameter on the taper that is.

Thread everything together and tighten up and the washer will stop it pulling thru the collet.

John S

[RICHARD GREEN 2Participant @richardgreen2]

Thanks John, thats a good idea !

Richard.

[BazyleParticipant @bazyle]

A long arbour is going to glex a bit. How about if you have / borrow / make a second support and run a short arbour between them powered via some UJs.

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