Questions about an early Bonny Doon press

I think that’s pretty cool! You’ve got a little bit of contemporary metalsmithing history.

I think you know, but just in case, that acrylic protector does two things. It’s protects the platens and also acts like a spacer to help keep the ram from being fully extended.

Cynthia Eid mentioned face plates on the risers. You should definitely use those. The only problem is they only make them in 6"x6". They’re Kevlar plates.

The problem is that acrylic can potentially shatter and shoot out like a plastic bullet, which can be very dangerous. If your press has an unprotected acrylic spacer without the Kevlar layer, it’d be best to remove it and figure something else out.

Here’s the 6"x6" Kevlar face plate that Rio sells. I’ve seen students do dumb things three times in my career and shatter the acrylic even with the Kevlar face plate on. No one got hurt, but it could have been bad.

That’s fantastic that your press came with accessories.

I wouldn’t worry about the welds. I’m confident that Lee built a solid press that will outlive us all.

Have fun with it!!

Jeff

Donna, Until your bottle jack gets repaired, like others have said you can use an inexpensive hand crank bottle jack that is the same size. It’s not that hard to estimate the power without a guage. Use the least amount of strength necessary crank up your temporary bottle jack to accomplish your task. If you’re using all of your strength to crank the jack, you’re going too hard.

That’s a bummer about the rubber cap disintegrating! I don’t know if there’s a Harbor Freight or discount tool dealer in Hawaii, but that’s a good source for an inexpensive bottle jack.

Here’s some instructions to build a hydraulic press from an old Ganoksin thread. It tells you what you need in a bottle jack ram.

Best of luck!!

Jeff

Thanks for the info on the plates/protectors. I saw Rio had the kevlar; just ordered a set. (I had planned to use 3/4" thick aluminum slabs both as spacers and protectors.) I noticed that the paint has peeled off in spots on the top platen - I’ll probably clean it up and repaint.

We successfully weighed it. The press alone (w/o the acrylic ‘protector’) weighs 275.3 lbs; the pump is another 21.8 lbs. No wonder two strong guys couldn’t power lift it.

Doing a happy dance ;>)

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Mine was 100 lbs. I can imagine what you have to deal with…Rob