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So how do I get the lead screw out so I can lift the carriage off the table? I guess I need to take the gearbox off the shaft first, then wind it out? The taper pin at the non drive end (the end that took the hit when it fell over) really took some shifting, half of it came out - sheared off by the knock I guess. The pin at the other end so far has refused to budge - it just needs some perseverance and a nice short pin punch.
Just got home from the rugby club. Before I left I spent an hour or so banging the taper pin back and forth. It moves but doesn't come out...
So tomorrow I'll drill one, or both ends out. Pity they don't mark the "in" side of the pin, so you could be sure you're knocking it out the right way.
Agroshield
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If it is a taper pin, one end is smaller diameter than the other. This is often difficult to determine with just a Mk. 1 eyeball, but if you have a set of drill bits, poking the shank into both ends of the hole can help.
When installing the new ones, it helps to make the small end hemispherical and the large end just lightly crowned so it gives a visual reference for the next person.
I wondered what you meant when I read this, only now did it come to me - you meant scrapped it...
Not in my nature, stubborn, bloody minded Welshman....
The book says this was a "mills pin" - will have to look this up, Maybe originally it was, but defo a taper pin I removed. I'm guessing a mills is like a springly rolled over thing with a split down it's length?
Anyone else have any theories? Perhaps the old fritz needs a rebuild, or at least an accuracy check. This work is realy at the edge of it's capability, had to use the large flycutter to get over the whole thing...
Well that bit got machined and scraped, and with my new slip gauges I know what the discrepancy is between the upper and lower bits (over a thou...).
I also checked the difference on the knee top, and that’s 2thou front to back..
Biax is broken, how do you take down 2 thou? Die grinder of course...
I also checked the difference on the knee top, and that’s 2thou front to back..
Biax is broken, how do you take down 2 thou? Die grinder of course...
I’ve test fitted the carriage on the knee, the gib strip is slack. Do I need a new one or can I glue a strip of brass shim to the one I have, or the dovetail?
@pressbrake1 - any thoughts?
