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lothar baier wrote: You misunderstood what I said.

There are different scales of machines used for injection molding ranging from machines that make a part every time you pull the lever to high production machines that are fed from monster sized bins

Peter, setting up and adjusting an injection molder is a BIG job. They want to run millions of parts, not 100. Best, -John Peter Gottlieb wrote:

IMO, that's the really hard way to do it!! I'd measure the gears and write a simple spec and have the experts do it, or failing that, cast it out of filled epoxy resin in a Si rubber mold. See what I

Yes. I've been away from this sort of stuff for quite a few years, but Emerson & Cuming and others used to supply a wide variety of casting materials. I'd try calling their engineering department. I

If the company that made the gears is still in existence they might still have the molds and be willing to do a run. You'd need an insider at HP to get that info and a letter from them authorizing

Hi Pete, That gear may be a problem. I cannot say that I have ever noticed that one... or if I did, it probably scared me so much that I put it out of my mind ;-) The only economical way of making

i was not factoring the time to make a hob since this in my view is not needed, first off i have a bunch of hobs, i addition there are hobs on ebay on a regular base and there are several companies

Casting is definitely the way I would go if I couldn't spec that universal drive gear set. I have made some pretty decent low speed gears using JB Weld and a silicone mold. And there are

the hobbs are new (mostly) there is a 48DP in the lot, another question is the pressure angle needed, most of the hobbs are 20deg Chuck Harris <cfharris@...> wrote: lothar baier

thank you bob , you are speaking my mind excactly ! I only expect a financial compensation if i have to spend significant money, in this case i have the hobber i bought anyway plus the hobbs, i can

The only trace I can find of that one is at Manuals Plus ($155 for a paper copy). I have a .PDF of 08642-90224 with about half of the schematics from 08642-90226, if it'd help. This is a 20 MB file.

I am looking for the On Site Service Manual for an 8642B. The part number listed for the manual is 08642-90020. Thanks

This probably wouldn't work due to shrinkage, but if there isn't much load on the gears, couldn't you cast a replacement with a very short fiber filled epoxy? Assuming you had a set of good gears to

Sometimes it's not a matter of people being too cheap to offer to pay a reasonable amount for things, or to contribute items for reverse-engineering, but concern about the people who originally

lothar baier wrote: That was a very lucky purchase. The hobs alone, if they are sharp and any good, are worth easily 10 to 50 times what you paid for your machine. Now, do you have any 48 dp hobs in

hp used molded to spec gears this was done i believe because of the high cost of machined metal gears they used cheap nylon and probablky assumed that they would be

the gear shown on this page would be quite expensive, reason beein that this gear has two parts, the straight part is easy and can be hobbed, the other part that is slanted is not as easy, it cant be

i dont know of anyone right of the batt but if you want to i can take a look, i have a good lab and bonding capabilities, if i can get the mixer to work you pay me for the diodes and an hour of labor