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#125819 - 10/08/07 10:10 pm crosshatch  
Joined: Apr 2004
Posts: 139
headlamp Offline
BritBike Forum member
headlamp  Offline
BritBike Forum member

Joined: Apr 2004
Posts: 139
the south
I want to replace the rings in my T140 I would like to know the grit type and crosshatch information..The machinest i called says his machine uses a 45 degree cross hatch but he said its adjustable..Then there is the Qusetion of what rings should I use chrome or steel


thanks for you help! and this fourm
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#125820 - 10/09/07 12:40 am Re: crosshatch  
Joined: Mar 2005
Posts: 9,970
John Healy Online content
John Healy  Online Content



Joined: Mar 2005
Posts: 9,970
Boston, Massachusetts
Hastings recommends 45 for their rings.

They also recommend 220 to 280 grit surface finish for all three of their rings types:
a. grey cast iron (because we are using our rings in an air cooled engine ( where it is impossible to get cylinder perfectly round and distortion from mounting hardware is typical, I would use 220),
b. ductile iron and
c. steel rings
(both ductile iron and steel are coated with special coatings to make them compatable with the cast iron cylinder like chrome).

http://www.hastingsmanufacturing.com/ServiceTips/cylinder_bore_refinishing.htm


#125821 - 10/09/07 2:26 am Re: crosshatch  
Joined: Apr 2004
Posts: 139
headlamp Offline
BritBike Forum member
headlamp  Offline
BritBike Forum member

Joined: Apr 2004
Posts: 139
the south
Thanks for that bit of information It will make life easier


thanks for you help! and this fourm
#125822 - 10/09/07 12:50 pm Re: crosshatch  
Joined: Jun 2006
Posts: 804
andrewinpopayan Offline
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andrewinpopayan  Offline
BritBike Forum member

Joined: Jun 2006
Posts: 804
Halifax, Butt end of Europe
While on the site for Hastings rings, is it possible to make up a ring set for a piston from thier stock items and the careful use of a stone/dremel for the end gaps?

I have written to them and enquired thier minimum order, I might import a few sets for A10's etc and *bay them .


99% of carb problems are electrical.

1959 3TA

BMW R1150 Oilhead
#125823 - 10/09/07 7:37 pm Re: crosshatch  
Joined: Jun 2006
Posts: 804
andrewinpopayan Offline
BritBike Forum member
andrewinpopayan  Offline
BritBike Forum member

Joined: Jun 2006
Posts: 804
Halifax, Butt end of Europe
!!!!BUMP!!!!


99% of carb problems are electrical.

1959 3TA

BMW R1150 Oilhead

Moderated by  John Healy 


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