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The Storefront => eBay/FB Marketplace/Craigslist watch => Topic started by: 85RZwade on August 27, 2023, 08:19:41 PM

Title: Specialty equipment on FB
Post by: 85RZwade on August 27, 2023, 08:19:41 PM
Not mine, but near me; is this for truing crankshafts? Nice looking piece of equipment

https://www.facebook.com/marketplace/item/967079951227085/ (https://www.facebook.com/marketplace/item/967079951227085/)
Title: Re: Specialty equipment on FB
Post by: pdxjim on August 27, 2023, 08:59:36 PM
Quote from: 85RZwade on August 27, 2023, 08:19:41 PMNot mine, but near me; is this for truing crankshafts? Nice looking piece of equipment

https://www.facebook.com/marketplace/item/967079951227085/ (https://www.facebook.com/marketplace/item/967079951227085/)

"V blocks" are what's typically used for crankshaft truing
Title: Re: Specialty equipment on FB
Post by: bitzz on August 28, 2023, 06:17:14 PM
That's not going to do much for a Yamaha twin crank. Use two V blocks under the center bearings,  do one end, then install and align the other.
... but different cranks use different fixtures. The fixture shown would work well for a single, singles I usually mount a bearing in a collet and hang the crank vertically in the mill... that way I can put several indicators on it at once. I want the crank rotating in a bearing, not dead centers like in the fixture shown
Title: Re: Specialty equipment on FB
Post by: m in sc on August 28, 2023, 06:51:16 PM
when I did my 1st triple crank, I did it on v blocks, then chucked it in my lathe with the live center and then did a comparative check all on the same plane supported by the ends, just because it was there.

^ tool would dev be good for a single crank though.