TOPIC: MKIII sprag

MKIII sprag 28 Apr 2017 11:20 #1

dynodave
Topic Author
Offline
Moderator
dynodave
Posts: 450
Thank you received: 263

Did you know the Stieber 18 dogbone (rockers) in the starter clutch/sprag system are only rated for 4600RPM over run speed? The starter did not survive a series of dyno runs of a hot rod MKIII engine.
Recent starter over speed blow-up made me research the sprag again and I noted this tech spec and it's possible contribution to the problem.
Of course the melted alternator did not help much either with all the garbage and residue floating around the starter drive train.
DC4127
www.stieberclutch.com/products/built-in-freewheels/dc

Please Log in to join the conversation.

Dave Comeau
atlanticgreen.com/contact.htm

MKIII sprag 28 Apr 2017 13:20 #2

Jimcarroll Offline New Member Posts: 4 Thank you received: 0	Yeah, I noticed that when back when I was searching for a better price than the typical suppliers charge. I've bought them from VXB bearings for around $70. It would seem that Norton used what would fit what they wanted to do rather than what would survive. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
	Please Log in to join the conversation.

MKIII sprag 30 Apr 2017 11:17 #3

mikethgreek Offline Junior Member Posts: 33 Thank you received: 7	Hi Jim, Mike Pappas here. I still have the link you sent me on that sprag clutch (much appreciated). How long have you been using it, and any problems with it? TIA, Mike the Greek Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
	Please Log in to join the conversation.

MKIII sprag 30 Apr 2017 12:43 #4

dynodave
Topic Author
Offline
Moderator
dynodave
Posts: 450
Thank you received: 263

I've bought a variety of bearings from VXB for different projects
VXB: www.vxb.com/DC4127-Steel-Sprag-One-Way-4...x13-5-p/kit18278.htm
DC4127 Bearing Steel Sprag One Way
41.275x57.935x13.5 Clutch Bearings
Our Price: $77.95

recognize the part #
see post above!
I got a pair of these a few years ago around $55 or $60 ea
They are 18 dog bone/rockers.

Original was 14 rockers and it had a brake foot in it Not sure who makes them.
I don't know what ANIL sells, but Phil Radford told me a few years ago, Norvil is not selling the 18 rocker sprags anymore.

Please Log in to join the conversation.

Dave Comeau
atlanticgreen.com/contact.htm

MKIII sprag 30 Apr 2017 20:25 #5

Jimcarroll Offline New Member Posts: 4 Thank you received: 0	mikethgreek wrote: Hi Jim, Mike Pappas here. I still have the link you sent me on that sprag clutch (much appreciated). How long have you been using it, and any problems with it? TIA, Mike the Greek Hi Mike, No problems with it; functioning fine. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
	Please Log in to join the conversation.

MKIII sprag 30 Apr 2017 20:38 #6

Jimcarroll
Offline
New Member
Posts: 4
Thank you received: 0

dynodave wrote: I've bought a variety of bearings from VXB for different projects
VXB: www.vxb.com/DC4127-Steel-Sprag-One-Way-4...x13-5-p/kit18278.htm
DC4127 Bearing Steel Sprag One Way
41.275x57.935x13.5 Clutch Bearings
Our Price: $77.95

recognize the part #
see post above!
I got a pair of these a few years ago around $55 or $60 ea
They are 18 dog bone/rockers.

Original was 14 rockers and it had a brake foot in it Not sure who makes them.
I don't know what ANIL sells, but Phil Radford told me a few years ago, Norvil is not selling the 18 rocker sprags anymore.

I have tried to find information on 14 rocker clutches and could not. I know the original was 14 as I remember thinking more must be, well, more better. I even tried using the specs to search but only came up with the DC4127.Are they the same number?

As for VXB: I found them looking for bearing for various pieces of farm equipment. I also found they had the bearings for a metal cutting band saw I had. The inventory is good for stock that moves but they haven't had some more obscure types leading me to spend dearly at Eastern Bearing

Please Log in to join the conversation.

Page:
1

Forum

NNENO Tech Forum

NHT supporting systems & components

MKIII sprag

Time to create page: 0.026 seconds