I need to make a bushing

SteveinLA · Jan 10, 2021

HI Guys,
I have a Roto-Hoe Chip N' Shred. It is a chipper/shredder for yard debris. It is powered with a B&S 5hp engine. It has an idler pulley with a bronze bushing. That bushing is wasted and I need to make a new one. What material should I make it out of? (I know, bronze, but specifically, which bronze alloy.) I have 1" brass bar in stock (also 1" aluminum 6061 T6).
Gee I love having an old South Bend to help me along!
Thanks
R, Steve

PmGRacer · Jan 10, 2021

932 bronze works well. Tiger Stripe 954 Aluminum bronze works well too. I have used both and many bushings. McMaster Carr’s website is a good guide for bronze material applications fwiw. I keep a bar or two handy of 954 and 932 for those custom jobs that always appear when you least expect it.[emoji2]

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michiganbuck · Jan 10, 2021

you might check if a standard might be found.
download a manual
roto hoe chipper shredder model 500 manual - Free Textbook PDF

Flail · Jan 10, 2021

You might be surprised to find it’s a standard size. Look at McMaster or plug the sizes into Amazon. The material to make from scratch will likely exceed the cost of a pre-made bearing, especially not counting your time.

SteveinLA · Jan 10, 2021

Hi PmGracer, thank you.
Hi michiganbuck, do you have a Chip N' Shred?
Hi Flail, you guys are the best. I find on McMaster-Carr something very close: for a 5/8" shaft, 7/8" housing I.D., 1 1/4" long (mine is 1 1/2" long; short by 1/4". that might work). Flange O.D. 1 1/4", flange thickness 1/8".

Certainly the right price at $4.42. part #7815K44 932 bronze bearing

It's a little short but it doesn't need an FAA certification.

What do you guys think?

R, Steve

SteveinLA · Jan 11, 2021

Thanks guys,
I ordered a bushing from MMC. That was a great idea,
R, Steve

chipss · Jan 11, 2021

SteveinLA said:
Hi It's a little short but it doesn't need an FAA certification.
What do you guys think? R, Steve

But does it hve a PMA stamp? Or is it STC'd.

SteveinLA · Jan 11, 2021

Hi Chipss,
I was just kidding about the FAA cert. Do you know what a Roto-Hoe Chip N' Shred is? There are videos on youtube. I have found that when the blades are sharp and the clearance between them and the support block is properly adjusted, it works very well. I love my Chip N' Shred. It's not a large machine so it gets around my residential property easily.
R, Steve

chipss · Jan 11, 2021

So was I.
Nope never heard of your machine.

Kevin T · Jan 11, 2021

Am I the only one who's disappointed that Steve is not making it? lol

SteveinLA · Jan 11, 2021

I'm disappointed too, Kevin. However, $4.66 vs. $70 to $100 a foot. That bronze material is expensive.
R, Steve

tommy1010 · Jan 11, 2021

Those bushings are cheap and in stock at Tractor supply, Lowes, etc. Many sizes available. No need to order and pay shipping.

Tony Quiring · Jan 11, 2021

Op did state idler pulley...

Get the whole pulley with ball bearing for 20 bucks at TSC and call it a day.

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michiganbuck · Jan 11, 2021

QY:{Hi michiganbuck, do you have a Chip N' Shred?]

I have a chipper shredder up at kellyroadcamp but I don't know what make it is.

I started to pile up my brush to provide habitat for rabbits and the like.
for a long time, I was making huge brush piles and burning them in the winter, so the property was actually too clean /cleared.

You can see the brush pile burning at my kellyroadcamp.com web site.

*Just for the fun of it, He could have/should have bought one 1/4" too long and then bought a surface grinder to grind it to the correct length.

john.k · Jan 11, 2021

It will be sintered bronze for sure...Oilite.

mcload · Jan 12, 2021

tommy1010 said:
Those bushings are cheap and in stock at Tractor supply, Lowes, etc. Many sizes available. No need to order and pay shipping.

Personally speaking, I have lost ALL confidence in any of those stores having anything near
the size I need for a part. (Maybe an Ace Hardware, but that would be the extent of it).
Handtruck wheels, spray paint, and chain...sure, no problem.

Just saying.
PMc

View attachment 310420

rv9apilot · Jan 12, 2021

chipss said:
But does it hve a PMA stamp? Or is it STC'd.

If it's for experimental it won't matter.

SteveinLA · Jan 17, 2021

You guys are funny!
Buy one with a roller bearing in it ...crike! I wish I had read that earlier! Oh well, MMC did deliver the next day. I was surprised to say the least. Most stores are a waste of time. However, we have a True Value hardware store close by that has a great bolt, nut, screw, washer, etc. section! I love this place!

So, I got a 4 1/2" long, 5/8" bolt and used it for an arbor. Centered it in a 4 jaw chuck to 0.002 TIR. I thought that was pretty good. Turned it down, pressed it in with a little help from a bench vise. Of course the ID was a little too tight so ...I wrapped some emery cloth around a wooden dowel and spun it up in a drill. I know, not the least bit elegant, but it gave a great running fit. Tomorrow I'll put it back together and grind up some Christmas trees (they make great mulch).

...and Bob's your uncle...

I love my lathe although I'm not much of a machinist.

R, Steve

I need to make a bushing

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