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Results 1 to 9 of 9
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23rd May 2009, 09:41 PM #1
how to tell the thread of a bolt.
i have a planining head i need to find out the thread of the spindle on it.
can i measure it and work it out?
i dont even know wheather it is imperail or metric.
here are the measurements.
11mm diamiter, 6 threads on the 8mm of thread thats there.
can i work it out form that or is it a mater of going down to the hardware and finding a bolt that fits?
www.carlweiss.com.au
Mobile Sawmilling & Logging Service
8" & 10" Lucas Mills, bobcat, 4wd tractor, 12 ton dozer, stihl saws.
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23rd May 2009, 09:55 PM #2
Buy a thread gauge Carl
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23rd May 2009, 09:57 PM #3
where would i buy one of them and what is it?
www.carlweiss.com.au
Mobile Sawmilling & Logging Service
8" & 10" Lucas Mills, bobcat, 4wd tractor, 12 ton dozer, stihl saws.
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23rd May 2009, 09:57 PM #4
Sounds like it's a 7/16" UNF thread
Cheers
DJ
ADMIN
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23rd May 2009, 10:04 PM #5
id say its
7/16" - 20 UNF
diamiter - 11,112 mm
pitch - 1,270mm
after some extra carefull measuring wiht my calipers.
my measurements came out to 11mm diamiter and 6 threads over 7.5mm (1.25mm pitch)
thanks dj
www.carlweiss.com.au
Mobile Sawmilling & Logging Service
8" & 10" Lucas Mills, bobcat, 4wd tractor, 12 ton dozer, stihl saws.
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24th May 2009, 10:34 AM #6
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A thread gauge is set of gauges with different thread pitches on them. They look similar to a set of feeler gauges. You would need a set for each type of thread, metric, UNC, UNF, etc. etc. There are combination sets that do some of the most common sizes. They have a variety of thread pitches on them. You open them up, put the gauge against the screw until you find the one that fits neatly in the screws thread. This will tell you what type of thread, and the pitch (Threads Per Inch), then you need to measure the diameter of the screw to determine its size. Simple hey! Certainly easier to show someone than describe the process!
Here is a link to one
http://www2.blackwoods.com.au/infoBA...4687&P=2028553
Might be easier to go to a fastener specialist and get them to check for you, and tell you exactly what it is. There are a few odd screws out there that will fit each other, but not usually very secure.
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26th May 2009, 01:19 PM #7rrich Guest
Just go to the hardware store and the hardware bins. Find a nut that fits. Not the bin that the nut came from and it should tell you the size and thread pitch.
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26th May 2009, 08:10 PM #8
Many of the Oz hardware stores have nuts and bolts in bins etc, but often they get badly mixed by people who look at parts but don't replace in the correct bin.Some store staff couldn't tell A from B either and put bits in the wrong bin when restocking.
From the info, I run with the UNF suggestion, but make sure that it's not a left hand (reverse rotation) thread.
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28th May 2009, 12:00 PM #9
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