Brush Research Mfg. Co. has a flex-hone for any type and size of cylinder
The Flex-Hone® Process (Super finishing) produces a controlled surface condition unobtainable by any other method. It involves finish, geometry and metallurgical structure and a high percentage plateau free of cut, torn and folded metal (with radiused ports).
Their cylinder flex hone is a resilient, flexible, honing tool with a soft cutting action. The abrasive (points) globules each have independent suspension that assures the Flex-Hone® to be self-centering, self-aligning to the bore, and self-compensating for wear.
If Your Cylinder Flex Hone Specifications Call For:
The sample Bore listings below are listed to only to the ten thousandths (0.01) which is all that is needed to find the correct cylinder flex hone. If your engine is not listed below and you do not know your bore size, please call (1-800-831-0884) or email us with your year, make, motor size and V.I.N. code, and we will find the correct cylinder flex hone for you.
Ford
3.0L
300
302
5.4L
330
351
352
360
390
400
6.9L*
428
429
7.3L*
460
Bore
3.50
4"
4"
3.55
3.87
4"
4"
4.05
4.05
4"
4"
4.13
4.36
4.11
4.36
Chevrolet
2.2L
2.8L
3.1L
3.2L
3.4L
250
283
302
305
307
327
350
396
400
454
Bore
3.50
3.50
3.50
3.56
3.62
3.87
3.87
4"
4"
3.87
4"
4"
4.09
4.12
4.25
International
This is a low-temperature abrading process that exposes the undisturbed base metal structure to produce a long-wearing surface. It is a method of developing a surface on a metal part that is optically smooth and metallurgically free of any fragmented, amorphous or smeared metal from previous operations. It is accomplished at a low pressure where the “stones” float.
See and read the various booklets of actual tests covering almost every situation that will ensure a superior performance in situations depending on surface finish.
The particular type of Flex-Hone® crosshatch is extremely efficient in providing a multiplicity of oil grooves or valleys for oil retention as opposed to the often unidirectional or uneven valleys common to the conventional type of rigid flex hone. A crosshatch usually remains as the cylinder wall has been wear-reduced by the FlexHone®
This picture is of a rigid honed by fa actory rework section. Photo at 1000x. The cross-hatch has the majority of the cut in one direction and is smeared, torn, jagged and folded metal on the surface. Some smeared metal is loosely attached to the surface. This is a very peaky profile of finish. 40 to 50u” (1.02 to 1.27um) finish. Cylinder #B-1
This photo is an after of the Flex-Hone.® 120 grit silicon carbide, photo at 1000x. It has an uniform cross-hatch pattern and a clean open appearance with smeared, folded and torn metal removed. This is an excellent semi-plateaued profile. There are small dust particles visible on the surface in the “Y” photo. 20 to 25U” (.51 to .63 um) finish. Cylinder #B-1
