View Full Version : Tomahawk rollerblade power pulleys.

10-25-2011, 01:30 PM
I am trying to find pulleys for my Tomahawk and have been unsuccessful in finding anything local. I was considering using rollerblade wheels for the power side of the chain. Without the little plastic spacer in them I can use 3/8" grade 8 bolts. Has anyone used this? With the sever angle changes do you think this will work?

10-25-2011, 02:13 PM
quote from brad.....
I strongly recommend that you use a pulley of at least 3 or more inches in diameter, and it must have a ball bearing in order to work properly as a drive side chain guide. Skate blade wheels have commonly been used for home built chain idlers by carving out a slot for the chain using a grinder or lathe, but this should really be avoided as there will indeed be a power loss due to the small diameter of the pulley and the softness of the material. For $10, you can get these nylon idler pulleys online

also can be bought at small engine/lawnmower repair

10-25-2011, 02:31 PM
6235K64Nylon Flat-Belt Idler Pulley 3/8" Bore, 3/4" Belt Width, 3.5" ODIn stock at $10.89 Each

6234K47 (http://www.mcmaster.com/#6234K47)10.13
mcmaster part numbers

10-25-2011, 05:11 PM
Is this the same part? http://www.gradfords.com/index.php?main_page=product_info&products_id=7376&i=b002E3D152
If you order 3 or more you get free shipping.

10-25-2011, 08:09 PM
Not quite the same, but fits the requirements.

Do you have any very small child's bikes around? the BB and chainring from that would work, if you cut off the cranks and thin down the teeth to fit the narrower speed chain.

Maybe check out this thread (http://forum.atomiczombie.com/showthread.php?3905-BB-For-Idler&)?

10-25-2011, 08:29 PM
Thanks for that have a couple rear bmx wheels that I might hack together from one of the suggestions on that thread.

I have done something with a BMX freewheel for a tall bike last year. I used it as an ajustable chain tentioner which is a little different than an idler. You have to remove the pawls and set the half a million loose bearings back in. Also you have to make sure that the predominate rotation of the freewheel is clockwise so it doesn't back the threads out. I cut the rear hub flush to the inside where the spokes go. I welded a large washer and stud to a handle bar stem and slid the whole unit onto a tube that is welded to the bike.