Horstman Rev-Grip Clutch Question - General - General

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Horstman Rev-Grip Clutch Question

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Posted: Mon May 27th, 2019 10:15 pm

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1^st Post

Joe Drabicki
Blackhawk Kart Guru in Florida

Joined:	Tue Mar 28th, 2017
Location:	North Orlando Area, Florida USA
Posts:	156
Status:	Offline
Mana:

Hey Guys!

Horstman Rev-Grip dry clutches were a thing back in the 70s and 80s.

I just sold an outboard spider hub to Bob Alexander. Bob, please post the photo you sent me. I can't transfer it from my phone.

The hub has a McCulloch taper and uses a half moon key to lock it to the crankshaft.

The center of the hub (hub on right in photo) is larger diameter than the center of the hub on the left (assembled hub). We can't identify what the hub on the right is used for, say maybe a drum with 15T or 16T?

I emailed Horstman Clutches about 30 minutes ago. Maybe they can ID it in a couple days. In the meantime, can anyone help ID this clutch spider hub?

Kind Regards,

Joe

Posted: Tue May 28th, 2019 12:20 am

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2^nd Post

Bob Alexander
NW Ohio

Joined:	Sat Apr 8th, 2017
Location:	Ohio USA
Posts:	40
Status:	Offline
Mana:

Joe;

Here is the picture.

Bob

Attachment: email.jpg (Downloaded 96 times)

Posted: Tue May 28th, 2019 11:31 pm

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3^rd Post

steveohara

Joined:	Mon Sep 18th, 2017
Location:
Posts:	20
Status:	Offline
Mana:

That hub is used on the oil bath version of the clutch. The bearing in the aluminum cover rides on the OD of the side that does not have the snap ring groove. The nut that holds the hub on the crank goes inside the boss.
Steve O'Hara

Posted: Wed May 29th, 2019 12:53 am

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4^th Post

Bob Alexander
NW Ohio

Joined:	Sat Apr 8th, 2017
Location:	Ohio USA
Posts:	40
Status:	Offline
Mana:

Thanks Steve;

But this one seems to be shaped the same as my other clutch spiders for a backer plate and snap ring.

Bob

Attachment: email2.jpg (Downloaded 70 times)

Posted: Wed May 29th, 2019 03:09 am

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5^th Post

Kurt Bogerman
C8H18 +12.5 O2 -> 8 CO2 +9

Joined:	Wed Oct 18th, 2017
Location:	Pennsylvania USA
Posts:	12
Status:	Offline
Mana:

I found an ad from Karter News, December 1970, at this web page: http://www.lostenduros.com/?page_id=678

Maybe this sheds some light on things?

Attachment: dec70k.jpg (Downloaded 68 times)

Posted: Wed May 29th, 2019 03:36 am

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6^th Post

Bob Alexander
NW Ohio

Joined:	Sat Apr 8th, 2017
Location:	Ohio USA
Posts:	40
Status:	Offline
Mana:

I could see it as an inboard slip-o-matic clutch. Thanks...

Bob Alexander

Current time is 09:22 pm

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