Metric Threaded Rod Information Requested

[SpudRider]

I recently bought two rocker arms for the lower shock linkages of my Honda XR650L and CRF250X motorcycles. I bought these rocker arms so I could have spare parts ready to install whenever I wish to perform suspension maintenance. I have already inspected, greased, and changed the bearings in my spare rocker arms so I can swap them out for the parts currently installed on my bikes. I can then inspect, lubricate, and repair the other rocker arms at my leisure. ;)

Among other tools, I bought a blind bearing remover for my XR650L swingarm bearings. I can also use this tool to remove bearings from rocker arms. :)

My blind bearing remover has a collet with an unusual, m12 x 2.0 thread. :wtf: Unable to find such an unusual threaded rod on short notice, I successfully employed a 1/2" threaded rod with a pitch of 13 threads per inch. ;)

However, if possible, I would like to obtain the correct threaded rod. ;) Does anyone know where I can obtain a short piece of m12 x 2.0, threaded rod?

[alchemysa]

Does anyone know where I can obtain a short piece of m20 x 2.0, threaded rod?

How 'short'?

[SpudRider]

The minimum length is about 80mm. Longer sizes will also work well. :) Therefore, I need a piece of 12mm threaded rod, or stud, with a 2.0mm thread pitch, at least 80mm in length.

m12 - 2.0 x 80mm

[Weldangrind]

I'll see if I can find anything around here.

[katoranger]

Try Fastenal.

Grainger has it in M12 x 1.75

http://www.grainger.com/category/threaded-rods/bolts/fasteners/ecatalog/N-8k5?bc=y#nav=%2Fcategory%2Fthreaded-rods%2Fbolts%2Ffasteners%2Fecatalog%2FN-8k5Z1z02r7w%3F_%3D1387209405305

[GlennR]

I don't think 12x2.0 is a commonly produced pitch.

12 is available in an unusually wide range of thread pitches.

1.0
1.25
1.5

and 12x1.75 is the standard course thread.

Maybe you mismeasured? Could it be a 12x1.75 or a 14x2.0 ?

I checked here: http://www.metricmcc.com/ They are one of the largest metric fastener suppliers in the US.

edit: the second post quotes you asking for a 20x2.0 That is an available thread.

[SpudRider]

I'll see if I can find anything around here.

Thank you Weld. :)

[SpudRider]

Try Fastenal.

Grainger has it in M12 x 1.75

http://www.grainger.com/category/threaded-rods/bolts/fasteners/ecatalog/N-8k5?bc=y#nav=%2Fcategory%2Fthreaded-rods%2Fbolts%2Ffasteners%2Fecatalog%2FN-8k5Z1z02r7w%3F_%3D1387209405305

Thank you, Allen. :) I tried the M12 x 1.75 thread, and it won't fit. :shrug:

[SpudRider]

I don't think 12x2.0 is a commonly produced pitch.

12 is available in an unusually wide range of thread pitches.

1.0
1.25
1.5

and 12x1.75 is the standard course thread.

Maybe you mismeasured? Could it be a 12x1.75 or a 14x2.0 ?

I checked here: http://www.metricmcc.com/ They are one of the largest metric fastener suppliers in the US.

edit: the second post quotes you asking for a 20x2.0 That is an available thread.

Thank you; I corrected my error in my previous posts. :) You're right; m12 x 2.0 is definitely an oddball thread. In fact, it might be a specialty thread. ;)

I went to two, local hardware stores, and tried different bolts. I found m12 x 1.25, m12 x 1.50, and m12 x 1.75 threads. The hole is definitely threaded for 12mm. I can partially screw either an m12 x 1.75 bolt, or a 1/2"-13 bolt into the thread. The m12 x 1.75 bolt goes in a little deeper before it locks up, so I am pretty confident I need an m12 x 2.0 thread. The thread pitch is definitely larger than 1.75mm.

[katoranger]

I would give fastenal a try.
http://www.fastenal.com/web/locations;jsessionid=hTXRSvsYm8hQcZ8mQfFf5gWZ6G64p t1pvBYnxGsXlyc51vpwppVg!-2008708590!767559968

[bogieboy]

Its not a fine pitch 1/2" thread is it spud? I think that would be a 1/2-18 common, or a 1/2-20 specialty (older bicycle pedals were 1/2-20)

[SpudRider]

I just realized, I will also need to get several nuts to fit the m12 x 2.0 threaded rod. :doh: I can't find any nuts this size, so I am beginning to become convinced the m12 x 2.0 thread in my blind bearing puller might be a 'proprietary' thread, designed to force you into buying the manufacturer's special parts. :wtf: What do you guys think?

I needed a 20mm, blind bearing collet to pull the needle bearings from the swingarm of my Honda XR650L, and the lower shock link of my CRF250X. This collet alone costs $30, delivered. :wtf: Therefore, I decided to spend $85.49, and bought the Tusk Bearing Remover from Rocky Mountain ATV/MC. ;)

http://www.rockymountainatvmc.com/p/989/20342/Tusk-Bearing-Remover?term=blind%20bearing%20puller%20set

http://www.rockymountainatvmc.com/images/prod/400/t/tus_08_bea_rem-1.jpg

The slide hammer in this set has an m12 x 2.0 thread on the end which inserts into the collets. I can use the slide hammer to remove wheel bearings and blind bearings in engine cases, et cetera. I can also use the slide hammer to remove bearings from the swingarm. However, using threaded rod is much better for removing bearings from rocker arms, lower shock links, and other small parts. ;) I recently removed a bearing from my CRF250X rocker arm using the 20mm collet and a piece of 1/2"-13 threaded rod. :)

If, as I suspect, the 12mm x 2.0 thread is proprietary, I will keep using the standard, threaded rods. ;) If I wish to preserve the threads in my collets, do you think I should stick with the 1/2"-13 threaded rod, or switch to the m12 x 1.75 threaded rod? The m12 rod does insert a little bit farther into the collet than the 1/2" rod. I didn't seem to do any damage to the collet by using the 1/2" rod, since it actually tightens into the collet as you pull the bearing. ;)

I pull the bearings using the techniques shown in the following link. :) Read Section 3, and view figures 7 & 8. ;)

http://www.motionpro.com/documents/pdf/I08-0294A.pdf

[SpudRider]

I would give fastenal a try.
http://www.fastenal.com/web/locations;jsessionid=hTXRSvsYm8hQcZ8mQfFf5gWZ6G64p t1pvBYnxGsXlyc51vpwppVg!-2008708590!767559968

We have a local Fastenal store. I have searched their website, but I will also give them a telephone call. :)

[SpudRider]

Its not a fine pitch 1/2" thread is it spud? I think that would be a 1/2-18 common, or a 1/2-20 specialty (older bicycle pedals were 1/2-20)
Thanks for the input. :) No, it is definitely a coarse thread, BB. ;)

[cheesy]

I just checked at a tooling site I get the odd ball tap and die from and they do list an M12 x 2.0 die, but not a tap.

Methinks you may be threaded there, Spud.

You sure it isn't, gasp, Whitworth?

[SpudRider]

Thanks, Cheesy. :) I doubt the collets are Whitworth. Even if they were, I doubt I could find either Whitworth threaded rods or studs. ;)

[FastDoc]

Take it from a BSA owner.

Whitworth sucks.

[SpudRider]

:lol:

[Weldangrind]

Spud, I checked at Precise Bearing in Abbotsford today, and they can't find a listing for M12x2.0; the coarsest they can come up with is M12x1.75. The gentleman at the counter suggested that perhaps the thread is 1/2-20 or 1/2-30. He also shared that 1/2" is only .7mm larger than 12mm, so perhaps you could re-tap to suit.

[SpudRider]

Thank you for taking the time to check this out for me, Weld. :)

Today I experimented by checking the fit of three different bolts in my blind bearing puller.

1/2" - 13 tpi
12mm x 1.75
7/16" - 14 tpi

The 1/2" and 12mm bolts both screwed into the bearing puller about 3 threads deep. The 7/16" bolt screwed into the bearing puller about 8 threads deep. I have already pulled a needle bearing from a CRF250X rocker arm using a piece of 1/2 -13 threaded rod, without any apparent damage to the bearing puller. :tup:

Therefore, I have decided to experiment next time with a piece of 7/16 - 14 threaded rod. Based upon the results, I will either switch to the 7/16 -14 thread, or stick with the 1/2 -13 thread. :)

[SpudRider]

A 12mm x 2.0 thread would have about 12.7 threads/inch. A 7/16 -14 bolt would have a nominal diameter of 11.1 mm. A 1/2 - 13 bolt would have a nominal diameter of 12.7 mm. A 12mm x 1.75 bolt would have about 14.5 threads/inch. Therefore, it seems logical a 7/6 - 14 bolt would insert deeper than either a 12mm x 1.75 bolt, or a 1/2 - 13 bolt. ;) Converting everything to metric diameters and threads/inch, here are the results.

12mm - 12.7 tpi (bearing puller thread)
11.1mm - 14.0 tpi (7/16 -14 bolt)
12.7mm - 13.0 tpi (1/2 - 13 bolt)
12mm - 14.5 tpi (12mm x 1.75 bolt)

Do you think I stand a chance of stripping the threads using the 7/16 - 14 bolt? Although it is smaller, the bolt contacts about twice as many threads as the 1/2 -13 bolt, and seems to provide a pretty secure fit. I can always play it safe, and stick with the proven, 1/2 -13 bolt. ;)

I don't want to tap the bearing puller to 1/2 - 13 thread, because I still want the option to use the slide hammer included with the bearing puller set. ;)

[Weldangrind]

Perhaps you could use a die to turn down the male thread on the slide hammer, and install a Helicoil in the puller. That would give you the ability to choose a more common thread.

[SpudRider]

Thank you, those are good ideas and I will keep them in mind for the future. :) Things are working well now, so I think I will forego the modifications, and wait to see if they are necessary.

Last night I went to the local ranch store where we got the tent stakes for our Bonneville trip. I bought two, 3-inch carriage bolts, and cut off the heads with a hacksaw. Now I have two threaded studs which are exactly the right length for pulling bearings. :tup: The total cost for all the hardware was less than $1.50. :)

[FastDoc]

What? No sale!?

[SpudRider]

What? No sale!?

No, just the everyday, low prices. :hehe:

[Weldangrind]

Last night I went to the local ranch store where we got the tent stakes for our Bonneville trip. I bought two, 3-inch carriage bolts, and cut off the heads with a hacksaw. Now I have two threaded studs which are exactly the right length for pulling bearings. :tup: The total cost for all the hardware was less than $1.50. :)

That is a terrific store. On Wednesday, I stumbled upon the cobalt bits I bought there, right when I needed them.

Spud, did the helmets get any cheaper?

[SpudRider]

Unfortunately, no. I usually check every time I go over there. ;) However, I'm sure they will have them on sale again. If they drop the price, do you want me to let you know? I can certainly buy a couple for you, and ship them to you. Or you can pick them up the next time you visit Spudville. :)

[Weldangrind]

I'll consider that for my daughter, but I can't remember what the helmets look like. If they go on sale, please take a pic of the design for me.

[SpudRider]

I'll consider that for my daughter, but I can't remember what the helmets look like. If they go on sale, please take a pic of the design for me.

I certainly will. How old is your daughter? Do you think she will fit into a youth helmet? If so, you might consider purchasing today's deal at Motorcycle Superstore. You can get the One Industries Youth Helmet for $29.99. :tup: You can measure her head, and check the sizing chart. ;)

http://www.motorcycle-superstore.com/dotd.aspx?SiteID=em_12_22_DOTD_Youth-Atom-Bolt&WT.mc_ID=36557&WT.i_e_dcsvid=105474584