LOW budget grinder (version 0.01a)

**Stubear** · 07-30-2010, 01:48 PM

Thats really cool Dave!

Great job!

**ScottGoodman** · 07-30-2010, 09:08 PM

Hows the job hunt going?

**Del1r1um** · 08-09-2010, 02:23 AM

Originally Posted by shooter74743

Hows the job hunt going?

It's going ok I suppose... had four interviews this week (two of those were the 2nd interviews BTW

).. So, we are just doing what we can in the meanwhile. Thanks for asking...

Now to answer some questions on the grinder... I would plan on making a permanent mount with a better shaft/bearing system in order to increase stability. But I really do think that it will be necessary to cast a flywheel to keep this sucker going for a grinding session.

**Geezer** · 08-09-2010, 04:36 PM

Totally off the wall in keeping with the thread.
Why not use the rear part of a kids' bicycle to hold the wheels. Use the chain, sprockets, and pedals to drive it. Leave enough of the rest of the frame to cast into a concrete base using a ready mix type product?

**Del1r1um** · 08-09-2010, 04:41 PM

I actually had designed something like this as an alternative, but I also wanted to test the treadle concept... either way, I really think you'd need to have a heavy flywheel to keep things turning.

**ScottGoodman** · 08-09-2010, 04:46 PM

The second interviews always made/made me feel like I have a good chance at it. I hope you knocked their socks off!

**deighaingeal** · 08-09-2010, 08:03 PM

For a cheap heavy flywheel look into an exercise bike. I have made a lathe for a friend using a frewheel and a spring so the chain passes over the freewheel on the exercise flywheel then the end of the chain is attached to a treadle. The other end of the chain is attached to a door spring to spring the chain back for the next push. If i get to the other side of the state this summer I'll take a pic and send it your way.

**Del1r1um** · 08-09-2010, 08:31 PM

Perfect, that would work really well. Thanks for the idea.

Dave

**Geezer** · 08-10-2010, 02:03 AM

+1
~Richard

**ignatz** · 08-14-2010, 12:32 PM

As my father always says to me, "Don't reinvent the wheel".

I go along with Geezer's approach to your question. Using parts of bicycle frames, chain drives and freewheels are probably a much better bet than what you now have.

For a bit of inspiration I give you the following links:

12 Knife Bikes

1940s/1950s Knife Sharpener Bicycle (Gundle?) « Museum of Tradesmanâ€™s Delivery Bikes

DIY gadgets in Africa: the knife-sharpening bicycle - Boing Boing

bicicletta dell'arrotino - knife-grinder's bicycle | Flickr - Photo Sharing!

KNIFE GRINDER (issue title SEE HOW THEY RUN) - British Pathe

YouTube - Afrigadget: A bicycle powered knife-sharpening machine

Thread: LOW budget grinder (version 0.01a)

LinkBack

Thread Tools

Display

The Following User Says Thank You to Stubear For This Useful Post:

The Following User Says Thank You to ignatz For This Useful Post:

Posting Permissions