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crosshatch #125819
10/08/07 10:10 pm
10/08/07 10:10 pm
Joined: Apr 2004
Posts: 139
the south
headlamp Offline OP
BritBike Forum member
headlamp  Offline OP
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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Re: crosshatch #125820
10/09/07 12:40 am
10/09/07 12:40 am
Joined: Mar 2005
Posts: 10,251
Boston, Massachusetts
J
John Healy Offline

BritBike Forum member
John Healy  Offline

BritBike Forum member
J

Joined: Mar 2005
Posts: 10,251
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


Re: crosshatch #125821
10/09/07 2:26 am
10/09/07 2:26 am
Joined: Apr 2004
Posts: 139
the south
headlamp Offline OP
BritBike Forum member
headlamp  Offline OP
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
Re: crosshatch #125822
10/09/07 12:50 pm
10/09/07 12:50 pm
Joined: Jun 2006
Posts: 804
Halifax, Butt end of Europe
andrewinpopayan Offline
BritBike Forum member
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
Re: crosshatch #125823
10/09/07 7:37 pm
10/09/07 7:37 pm
Joined: Jun 2006
Posts: 804
Halifax, Butt end of Europe
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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