Gallery, Projects and General > The Design Shop

Small (broach) press. Hydraulic or mechanical?

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PekkaNF:
Thank you. That starts to make sense. Looks like my tools multiply faster than the space I have.

My first instinct was on arbour press, but soon I realized that none of the stuff i have fits to it. It's all from the drawing board up. The chinese stuff they sell here is really a nonstartter. Way too limitted daylight, not a single part is staright, too little stroke etc. Therefore I should start from the scratch and it looks like a gear module has to go up few notches than I'm used to to take the load. Having an electrical engineering background instead of mechanical engineering I'm having a slight problem on gear rack/pinion module size. Looks like this approach would be fairly expensive or the stuff is dimensioned or manufactured to different standards than off the self stuff I can buy.

I wish there were cheap pull broaches.

But it looks like I have some more homework to do before rushing buying and welding stuff.

Pekka

John Stevenson:
I'll have a look to see if I have any old photo's of the press with both types fitted but I don't think I will be lucky.
Basically it was a normal hydraulic press like many people build but had a rack to one side of the cylinder with the pinion behind it so you were pulling towards you. The operation was a simple capstan with 4 holes in it and you just kept moving the lever from hole to hole.
A ratchet would have been better but it sufficed at the time.

PekkaNF:
I got one small and cheap hydraulic unit minus motor and valves. It was cheap and unused.

It has 1,1 cm3/r capacity, 230 bars or so and can take up to 4000 (or 6000 rpm). Needs a motor and came with frame 71 mounts/couplings i.e. 0,37-0,55 kW induction motor parts.

It has cetop3 drilling and some ports I might connect hydraulic hoses right into. It has a pressure relief valve and 10l tank.

I need to see if I could use it.

Pekka

PekkaNF:
I bought a broach set last night. Waitting it to arrive from UK.

Someone suggested motor hois and incidently my brother noticed one spare motor hoist pump/cylinder unit as a spare. It was 45 EUR, but since it is single action is no go for me when I'm this deep on the other end of the mud puddle. however if someone else is considering DIY that might be a easy way on manual system. Stroke and force looks good enough, it is all integrated much like a bottle jack, just a longer stroke.

Pekka

tom osselton:
I have bought a 1/4" square broach that I'm hoping the 3 ton arbour press will handle.

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