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Thread: Horizontal Mill Issues
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24th Jul 2018, 01:10 PM #1
Horizontal Mill Issues
Is this likely to be RHT or LHT?
Also I can’t see any way to lock the spindle to undo this.
…..Live a Quiet Life & Work with your Hands
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24th Jul 2018, 01:17 PM #2
There is a mechanical powerfeed to the table.
. When the adjustable stop in the T slot hits the toggle it moves the lock to the right which allows you to move the handle down to disengage. Should this handle automatically drop down and disengage? Even if it has hit the stop and unlocked it keeps going unless it is manually pushed down. Doesn’t seem right to me.
Locked & Engaged
Unlocked & Manually Disengaged
…..Live a Quiet Life & Work with your Hands
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24th Jul 2018, 01:38 PM #3Most Valued Member
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Generally the nut is left hand.
In regards to the feed you would expect the feed to cancel when the trip has been hit, does everything move freely by hand or is it stiff?
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24th Jul 2018, 02:02 PM #4
It’s all stiff, but I have had it all apart cleaned it and given it a light oil.
…..Live a Quiet Life & Work with your Hands
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24th Jul 2018, 02:38 PM #5Most Valued Member
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You may need to take it apart again and check clearances, I wouldn't think it should be stiff.
Is the table dog moving the knockout lever enough to disengage,something may be worn there.
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24th Jul 2018, 03:19 PM #6Golden Member
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Hi Dale,
Regarding the arbour nut, it's hard to tell but it looks like the cutter might be mounted so it cuts with the spindle rotating anti-clockwise.
Usual practice if not using a key is to mount the cutter so the cutting forces will act to tighten the arbour nut. So if it is mounted to cut with anti-clockwise rotation I would take a guess at regular right hand thread.
Regarding the feed, the old Cash mill I used to own had a very similar feed trip mechanism. The feed lever should move up and down freely and fall to rest in the disengaged position purely due to gravity. Perhaps try backing off the nut at the rear of the lever which might allow it to fall into the disengaged position by itself.
Cheers,
Greg.
X Feed.jpg
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24th Jul 2018, 04:02 PM #7
I think I have the power feed disengaging properly now. I pulled it all apart again and found a burred or peened edge on the bronze. Good news is it was old so it wasn’t me, bad news some one dropped or knocked it at some point and it wasn’t fresh so blended in and I didn’t see it. I also didn’t tighten the nut kiwiboi pointed out very much.
Gotta sat it amazes me how poor some castings are that make it onto machines.
The bronze worm gear has seem better days also.
Trying to undo the arbor nut I manage to undo what I’m guessing is a draw bar.
Going to see if Mr google can find me manual for a similar machine so I have a bit more of an idea of what I’m looking at and give a clue.…..Live a Quiet Life & Work with your Hands
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24th Jul 2018, 04:24 PM #8Senior Member
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hi
careful you dont bend the arbor if you have not got the over arm steady on
steve
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24th Jul 2018, 05:12 PM #9Most Valued Member
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Looks like its got a backgear arrangement similar to the small 9" Hercus I used to have.
To engage the backgear its likely a case of disengaging a pin that locks the large gear on the spindle shaft to the large v-pulley.
Once thats done the backgear can be engaged by moving the handle on the end of the backgear shaft until the gears mate with the spindle ones.
If you leave the pin engaged and then engage the backgear the spindle is locked solid. Not sure if its the official method but that was how I used to lock the Hercus spindle to remove the screw on chucks.
Steve
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25th Jul 2018, 01:00 PM #10Golden Member
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The arbor nut is most likely to be l/h although I have two arbors with my mill, one is l/h and the other r/h thread. Agree you should definitely install the arbor support before reefing on the end of the arbor, they are useless once bent.
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25th Jul 2018, 01:11 PM #11
Found the pin
It’s spring loaded so once the gear or pulley do a revolution it drops back in and engages again?…..Live a Quiet Life & Work with your Hands
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25th Jul 2018, 01:59 PM #12Senior Member
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Pull it out and twist half a turn?
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25th Jul 2018, 05:28 PM #13
Oldbiker your correct there is a small pimple on the shaft of the pin if you turn it it stays up. It’s a $#\¥ of a design as i can’t even get my fingers in there to lift it or run it. I had to use a screw driver to pry it up and I had skinny fingers.
Finally got the nut off the arbor. I removed all the spacers and have cleaned them up. I had to stone the arbor to remove some burrs I couldn’t see but were catching them spacers.
I cleaned up the drawbar and knocked the arbor out with a brass rod. Looks like it is meant to be keyed but the key is missing. Does it need it?
I think the arbor is a Brown & Sharp No 7 taper. It might be a 9 but I’m guessing the smaller of the two?…..Live a Quiet Life & Work with your Hands
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25th Jul 2018, 05:37 PM #14
Next task is getting the spindle out and the back gear shaft so I can fit a new belt.
Are these steel bushes? Each end of the back gear shaft.
Don’t have the right size wrenches to fit
I was just going to get it working for now, but seeing how far I have to dismantle it I may get rid of the hideous vomit green. I don’t know when this color was in fashion but I have a lathe the same color and had a drill press all from different owners. I also saw a bunch of stuff at a dealers the same color which had coming from Boeing.
…..Live a Quiet Life & Work with your Hands
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26th Jul 2018, 02:13 PM #15Most Valued Member
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Hi Dean, over time l have seen a few horizontal mills running backwards, they should run anti clockwise when looking at the spindle from the front as 99% of cutters are made to cut that way when veiwed at from the cutting end of the tool.
Getting to the point..... so if you know the direction the shaft turns then you "undo in the direction of rotation".
This should apply to all shafts that rotate.
Have fun with the mill, shed
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