View single post by stewart.wigg@gmail.com
 Posted: 01-20-2025 07:09 pm
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stewart.wigg@gmail.com

 

Joined: 01-14-2025
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I got a copy of an excerpt which documents the allowable tolerances for head warp. The head appears to be well within tolerances:
Longitudinal
2&3 0.0025" (0.06mm)
1&2, 3&4 0.0025" (0.06mm)
Transverse
Rear less than 0.0015" (0.04mm)
Front 0.0015" (0.04mm)

So looks like I don't need to machine the head. However, I also checked the block.
Longitudinal
2&3 Lower edge 0.002" (0.05mm)
2&3 Upper edge 0.012" (0.3mm)

Transverse
No discernable warp

I don't have any numbers for the block tolerances, but the longitudinal distortion at the upper edge looks concerning. Anyone know the tolerances for the block?

Attachment: head tolerances.PNG (Downloaded 10 times)