Author Topic: Spiral Cut Reamer 1-19/64  (Read 387 times)

Offline MiniDave

Spiral Cut Reamer 1-19/64
« on: April 12, 2020, 04:01:44 PM »
I need this odd sized reamer to ream the rear bushing in Sprite transmissions.....at least I think that's what I need. The stub of the driveshaft measures 1.285, 1-19/64 is 1.296875, 1-5/16 is 1.3125, that seems like a pretty big gap.

1.296875-1.285 = .01875

1.3125-1.285 = .0275

I can't find any sizes or specs on what the hole size is supposed to be, but that is a weird size reamer - I haven't been able to find a spiral cut adjustable either. A straight cut won't work because there's a split in the bushing so you can press it into the housing.

Anyone have any ideas?
Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

Offline John Gervais

Re: Spiral Cut Reamer 1-19/64
« Reply #1 on: April 12, 2020, 07:17:04 PM »
SpridgetGuru has a lot of downloadable reference books and I tried to upload a couple of .pdf's, but they're too big.

Perhaps the specification or tolerance is in here?

http://www.spridgetguru.com/AKM0036/AKM0036.pdf

Or, in the library?

http://www.spridgetguru.com/Spridget_Books.html
- Pave the Bay -

Offline MiniDave

Re: Spiral Cut Reamer 1-19/64
« Reply #2 on: April 12, 2020, 08:40:41 PM »
The first link is a parts book, which I'm grateful to have as the illustrations are much clearer than anything I've found up till now, but doesn't help with any specs that I could find in a quick look. I've downloaded it to save for now.

While 33mm is slightly bigger than 1 19/64, I doubt they were using metric reamers back then......I've got some calls out to specialists who build race boxes, I'll see what they come up with too.

thanks guys!
Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

Offline tsumini

Re: Spiral Cut Reamer 1-19/64
« Reply #3 on: April 12, 2020, 11:41:21 PM »
Will a 1 9/32 spiral reamer (available) work for initial cut 1.2812 (0.004T)? Then use the straight adjustable for the final 0.005 to get 0.001L.
I used an adjustable reamer for the radius arm bushing and had the hangup problem on the bushing split so I found that turning it backward would cure that problem but that is on bronze material. You didn't say what material you had to ream.
I also presume you  need loose fit after bore.