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Recent content by hennebury

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    What material for shafts?

    Thanks for all of the input. So I have to replace some piston rods for the feed cylinders as they are also a mess, for those i was going to order 25mm the induction hardened, chrome plate cylinder rod. If there is no reason not to use the cylinder rod for the linear rod on the cast iron feed...
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    What material for shafts?

    I have to machine a step down on the end to press-fit into the casting, this is what will make me nervous. I have seen one or two with cracks, so any advice on how tight to do this, and any tips on pressing the shaft in without cracking the casting, heat the casting? cool the shaft?
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    What material for shafts?

    Yes, and thank you. I recently did a Martin T17 rebuild.
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    What material for shafts?

    Hi, So I am rebuilding woodworking machines. I often have old Maka mortisers to rebuild. The mortising head unit is held in a cast iron unit with two 30mm bores, the unit slides on 30mm round bar. The cast iron bore and the round bar are often galled up, sometimes quite badly. I would like to...
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    Looking for advice on making machine shafts.

    I will certainly look into what you have suggested, thank you. So much to learn.
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    Looking for advice on making machine shafts.

    Hi Bill, The only information I have is on the spec sheet from the 70's, but it shouldn't be too fussy on the offset as the crank is part of a system that provides an infinite variable ( within the parameters) throw on part that it moves. You can adjust the amount of throw the crank supplies, so...
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    Looking for advice on making machine shafts.

    Thanks Stephen, Yes its for Maka mortisers, and yes it will fit the bore of the lathe. My reason for thinking about a collet with an offset bore to use in the Jacobs chuck, was for speed, accuracy and consistency, also for doing more at a latter date. I have a few machines to rebuild, and...
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    Looking for advice on making machine shafts.

    I think that if I machine the three center axis journals between centers and the main shaft to finish size first, then place the shaft in the offset collect, trim the end off, redrill it with a new center hole, and machine the offset in the custom offset collet and a center on the outboard end...
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    Looking for advice on making machine shafts.

    Maybe i didn't explain it correctly. The three journals that are on the center axis will be turned as you say. The offset journal will be turned in the custom made collet with the offset bore.
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    Looking for advice on making machine shafts.

    I am new to metalwork, so I will ask for your indulgence. I rebuild old woodworking machinery, make a few parts etc. I have a DSG lathe and a surface grinder I need to make half a dozen small machine shafts for some old machines that I am rebuilding. The shafts are usually pretty beat up when I...
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    The Tenon Jig

    Michael, The old machine had a 3" depth of cut the newer ones only have a 2" or so like you said; Sometimes the newer machines drop some of the features that are important to a few, for the newer features which appeal to the majority of users, so i am a little nervous about the newer tenoner...
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    The Tenon Jig

    Hi Michael, the Older 2/TAO tenoners really are magical; A brilliant design! The spindle is mounted on a pivot arm inside a large drum/ cylinder which rotates inside another cylinder, It is quite amazing. I found a couple of photos online; not the best but you can see a bit of what it looks...
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    The Tenon Jig

    Hi, Nice work on the tenon jig. You are correct about the Balestrini machines; I had a set of mortise and tenon machines for many years, I got them about 30 years ago. Excellent machines. Made for high production, but with a little tweaking you can turn out excellent joints. The models the I...
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    Strange air cylinder fittings

    BSPP fitting in BSPT hole Hi, So i am rebuilding an old woodworking Machine. 1980 vintage made in Germany. It has a feed cylinder on it. an air over oil system . Air is the power , oil is the controlled feed. Thing is the end caps of the cylinder have BSPT taper/ conical bore R3/8" , but...
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    Dean Smith Grace Lathe Owners

    He has a flat-top version the same as mine, it even has a rubber mat for your tools. So i don't think that's the reason for the holes. Unfortunately i have no idea why the holes are there.
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