Anyone have any idea what the bolt / threading size is on the relatively large steering head bolt on a '02 R1150R? I need to clean both the male and female threads up and need to know what size tap / die I need. The BMW part # is 31 422 314 1 31 but the sizing info is not listed on the fische. Thanks for your help!
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2002 R1150R - Steering Head Bolt Size?
- Thread starter shropdog
- Start date
IS there standard or fine threads involved? I am told that there is another number ?
Is it fine thread or ?
Paul ( similarly situated)
Is it fine thread or ?
Paul ( similarly situated)
pglaves
#13338
18mm x 1.5 means a diameter of 18mm and a thread pitch of 1.5. Course or fine thread are word descriptors but a pitch of 1.5 means the distance from one thread to the next is 1.5mm.
I am not used to looking at 18mm diameter fasteners. I know that at 8mm 1.5 would be course and 1.0 would be fine, but have no real idea at 18mm.
I find it complicated-
This example may help-
What does M8 1.25 mean?
For metric fasteners, you will see a M8 x 1.25 or an M8 x 1. For thread pitch, the distance between two points is the second number meaning the higher the number the fewer threads there are. This means the M8 x 1.25 is the coarse threading and the M8 x 1 is the fine thread.
Metrically threadrically challenged OM
This example may help-
What does M8 1.25 mean?
For metric fasteners, you will see a M8 x 1.25 or an M8 x 1. For thread pitch, the distance between two points is the second number meaning the higher the number the fewer threads there are. This means the M8 x 1.25 is the coarse threading and the M8 x 1 is the fine thread.
Metrically threadrically challenged OM
jnrugg
Member
Ran across this that may help. http://www.apollointernational.in/iso-metric-thread-chart.php
