Manchester Rapidor Re-Build

[Davey JParticipant @daveyj]

Good afternoon his is my first post in what I hope will become a new passtime. I am attempting to dismantle a Manchester Rapidor for sand blasting/ renovation as my metal cutting skills are ropey to say the least.

I have a problem with the drive shaft that does not wish to be removed. Neil Greenway's article (issue 204) seems to show a simple conical arrangement which is presumably an interference fit? Before I tenderly take a lump hammer to these castings in an attempt to drift the parts from each other am I missing anything, should I apply heat to the eccentric plate first, should I place wooden packing between the bearing surfaces to protect them, is there actually a L hand thread hidden in there? The nut holding all in place came off easily by the way. Any advice would be much appreciated. Many thanks in anticipation

[Davey JParticipant @daveyj]

[Neil GreenawayParticipant @neilgreenaway71611]

Hi davey.

The eccentric plate is mounted onto the tapered end of the shaft and locked in place eith the right handthread nut. You mention this was removed now. Can you slide the short hinge pin out of the non drive side of the saw and use an alloy drift and a sharp thump with a hammer should loosen things. I didnt have to use heat. Your drift will be applied to the end of the threaded length and should be able to knock it through the eccentric plate.

Your saw looks to be a clutched saw whereas my own saw was direct drive and subsequently fitted with a clutch.

Hope this helps.

Neil

[Davey JParticipant @daveyj]

Many thanks for such a speedy reply, yes it is a clutched model. The short hinge pin is already out no problem. Tomorrow I shall attempt to persuade the shaft with care! Hope to have some decent shots once back from the sand blaster, however it has taken six months to get here so don't hold your breath. Then a search for a suitable motor as this one is still set up for flat belt drive. Once again many thanks. David

[Ian S CParticipant @iansc]

Just get some under coat on the bare metal as soon as you can, try and beat the rust thats sure to follow. Nice machine. Ian S C

[Davey JParticipant @daveyj]

Good evening, back with another question about my saw removable. Having managed to remove the eccentric plate with gentle use of a lump hammer, I am left with a large bush/bearing that ideally needs to be removed and there does not appear to be anything holding it in, is this another cone?

Is this realistic or am I better off covering to protect from the sand blaster and finishing this area by hand when it comes back? Obviously it would need to have the oil feed holes re aligned when re built. Secondly the clutch arm is held to the side of the saw by an odd shaped fixing which at present is reluctant to move (lump hammer again?). Does anyone know if this is threaded or a push fit?

Once again many thanks in anticipation for your help

David

PS. Ian your are right, the metal moths started chewing at all the unprotected parts within a day of getting them apart! Now oiled and a large tin of primer awaits on return from blast works

[Neil GreenawayParticipant @neilgreenaway71611]

My saw had a grub screw fitted to hold the bush in the main saw casting and the pivoting saw casting pivots on the other end of the bush. It was a plain bush in my saw before I added the clutch and rebuilt it. The grubscrew was beside the oil holes you mention. A lump of hardwood and a knock wiyh a persuader might help. Try a spanner on the flats of that fitting holding the clutch release arm in place. From memory it is 1/4 bsw as the non clutch saw had to be drilled and tapped to take the threaded pin with the spanner flats. Hope this helps,

Neil

[Davey JParticipant @daveyj]

Many thanks once again, rest day tomorrow so I will have a go first thing. Regards David

[Ian S CParticipant @iansc]

I'd get a wooden cylinder, and fit it in the bush while its getting blasted, blank it off. Ian S C

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