norman said:

Blame

When you raise the tumbler lever is the feed right to left? Mine is.

You may need to still play with the mesh between the 2 tumbler gears. Also the mesh between the spindle and each tumbler gear. Could you have one of the gears bearing a little too tight on the press in fit?

I did have to redo one gear, when I pressed in the bearing it was too
tight made that gear whine loudly. I pressed the bearing back out and
took off 0.001  on the ID of the gear made the gear a lot quieter.

Looking at my gears they are not meshed tight anywhere. More on the sloppy loose side. Your mounts are smaller, it could be causing them to vibrate more making it ring more. Have you tried putting a screw driver on the mounts/gear shafts pushing on different area to see if you can pin point where the noise is coming from?

does a little grease help to quiet the gears down?

My tumbler gear shafts were made from 1/8" pipe there fit in the bearing is on the loose side. I have a washer on each side of the tumbler gear bearing, when I tighten the bolt the washers pinch clamp the non rotating part of the roller bearing.

 

yup mine feeds that way too. you make a good point about the press fitting  i used aluminum for the cams  and they should be ok  but might be the OD bearing/ID of the Gear that making the whine  might play around with them alittle bit 

today. i really hate press fitting everything  but more i think about it that seems like the culprit. the second gear is pretty thin that would cause it vibrate alot (and ring)

thanks for the ideas Norman

Blame

I got the injection today first of 3. Boy do I feel better!!!!! My wife said I was so sleepy(stoned is more like it) eating lunch today she thought I was going to fall over sitting in the booth at the restaurant, I was very hungry hadn't ate or drank anything since last night due to the rule of no food or drink before the injection, it was 2:30 pm. I slept all the way home from Amarillo, Tx. and most of the day.

So tomorrow if I'm good to go I want to cast some frame parts for the next try at the speed reducer, I also have a few other things to cast.

I sent Blame my deltasketch of the speed reducer( newer design) as I couldn't get it to post properly, so that is what I'll be messing with. I have a wedge type QCTP on the way it will be here next Tuesday, I'm very excited to get that.

Below is something I decided I'm not going to try. I left it here in case someone did try this and would like to comment on what happened.

I'm going to maybe try casting a small aluminum block with a wood core for one of the guys just so he and I will see what it does, I'm betting it will blow gas holes in the casting. The mold/pattern will be small and lots of weight on the mold in case  the thing trys to spit the sand out or the metal out of the mold, may even cover the mold with sheet steel. Face shield, nomex, steel toe boots, etc will be worn. It's going to be a pattern no bigger than 1"wide,1/2" thick,3" long, I'll use a 1/4" dowel at one end away from the pouring hole.

Still not sure I really want to try it. After thinking about this I've decided NO WAY!!!! I've done dumb things, chancing a steam explosion pouring metal is not something I need to do.

Anyway I hope to start the redesigned speed reducer tomorrow

Blame

You did post it already it's on #26 post, I have plans for making it a little different than what I drew so there will be some changes to it.

Thanks for asking. I'm working on a better drawing with deltacad, it takes me for ever to draw with CAD or I'll just do a good drawing with the simple draftsman tools I bought. The white board is getting pretty rough looking so I probably won't use it unless its for a quicky sketch.

Norman

Neil.

No I don't, Blame did the drawing for me from the white board drawing for the speed reducer. I haven't done any drawing for the speed reducer except what is on here already. I did make a second design where all the gears are in a straight line it should be easy to make with out drawing.

Norman

Look for my post titled  "G0602 speed reducer #2" this should get you going on building it. I used home cast plates and pulleys all parts fitted aren't critical just get a good fit between the gears. Use typing paper between the gears for spacing the gear teeth. I set the first gear in place using a transfer punch then drill the hole for it's shaft undersize then ream it for a good fit on the gear's shaft, next is fit the second gear in place with the typing paper between the gears teeth. Center punch the gears hole. Drill undersized then ream for a good fit. same thing for all gear shaft holes.

Stack the two plates when drilling so they will be parallel. I use 1/4-20 flush head bolts with a spacer made from tubing to hold the plates together, also use the screws to hold the plates clamped together. To use the bolts for clamping lay out the gears the mark where the bolts will go through the plate allowing space for the tubing spacers so they don't rub the gears. With the plates clamped together  drill a #7 drill bit all the way through tap the back plate for 1/4-20 threads then drill out the front plate to 1/4" dia. then counter sink for the flush head bolts.