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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Big Mechanicals: Head, Cyl, Piston, Rod, Crank, Flywheel, Cases, Bearings » Archive through May 04, 2010 » Cylinder hone cross hatch pattern (xb9) « Previous Next »

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Buellrider2
Posted on Sunday, March 29, 2009 - 12:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just had my new/used cylinders honed by my local harley dealer. The service manual specifies a "precise 60 degree" cross hatch pattern, i think mine looks closer to 30 degrees. Anyone know just how critical that this measurement actually is?
Is it important enough to take them back and have them re-done?
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Blake
Posted on Sunday, March 29, 2009 - 09:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just to be clear, what is your reference for gaging the angle? I mean what angle exactly are you referring to, the one formed by opposing cross hatching, or are you looking at the cross hatching with respect to the top/deck of the cylinder? If you see 30 degrees wrt the top of the cylinder, then you have a 60 degree cross hatch. : )
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Court
Posted on Sunday, March 29, 2009 - 11:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

: )
Exactly what I was thinking . . . complementary angles.


Angles


Is it 40o or 50o?

Pammy? . . where's Pammy. .. she'd know right off the bat.
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Blake
Posted on Sunday, March 29, 2009 - 01:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Frankly, I don't know what the heck I'm talking about. Pictures are good. What I think a 60 deg cross hatch is...



Cylinder Honing Cross Hatch Angle?


But maybe it's...


60 degree cross hatch angle?


Google isn't much help, lots of conflicting information.

Agrees with my first sketch above.

Seems to agree with second sketch, but kind of suspect

Says that the angle is "referenced to the top of the deck"

Agrees with first sketch


quote:

When hone marks intersect at 40 - 60 degrees, the cross
hatch angle is most satisfactory for proper seating of rings (See Figure 1). ... A controlled hone motor speed between 200 - 300 RPM is necessary to obtain
the proper crosshatch angle. The number of up and down strokes per minute can
be regulated to get the desired 40 - 60 degree angle. Faster up and down strokes
increase the cross-hatch angle.

"Figure 1" shown in post following:





Yeah, we need Pammy.

Or I could just keep editing until I stumble onto the correct answer. Neither of my service manuals depicts the angle in question.

(Message edited by Blake on March 29, 2009)
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Jramsey
Posted on Sunday, March 29, 2009 - 01:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Blake the upper pic. is the correct pattern for honing.
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Blake
Posted on Sunday, March 29, 2009 - 01:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cool. Thanks for the confirmation. Here's that Figure 1, which agrees as well.


Cylinder Honing Cross Hatch Angle
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Pammy
Posted on Tuesday, March 31, 2009 - 06:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The hone marks should intersect at 40 to 60 degrees.

Our honing machine is set to a certain RPM and strokes per minute to get the proper cross hatch.
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