Professional Truing Stand From Scrap Parts.




Introduction: Professional Truing Stand From Scrap Parts.

About: Engineer, machinery addict.

Here is my very own truing stand design. I put it together from scrap parts I found around my house, and some cheap commercially available parts.

Step 1: Parts List

You'll need the following items:
1. 3" wide hang track at least 20" long
2. 1" wide upright 40" long
3. 5/8 wide upright, 40" long
4. 3/8-16 turn buckle (see drawing: Threaded Block for details)
5. 3/8-16 shoulder bolt 2 pieces
6. 3/8-16 nut - 3 pieces
7. 3/8-16 Knob
8. 1/4" aluminum sheet, 4"x4"
9. Etc. (see the drawings for the rest of parts)

Step 2: Base Asm

Cut Parts to length
weld the bases together, as shown on the print
Drill holes on the base arms
clamp the arms together and weld them to the base

Step 3: Holder Asm

Cut all the pieces to length
Drill the holes
Assemble the shaft - I used a 12mm shaft from an old printer. Find something similar, that you think will work.
Make sure the asm is not crooked. clamp all the parts to a flat surface.
weld the holder asm pieces together.
Do not weld the shaft. It'll be bolted to the holder asm frame as shown on the print.

Step 4: Holder

Visit the local steel yard
try to find a piece of aluminum I've shown on the print (1.1"x1.1"x2.5") or similar in the cut off section
buy it.
use a drill press to drill the dia 12.0 hole. Use a 1/4" drill first, than the 12.0 mm one.
Make sure it matches the shaft you've got earlier for the holder asm.
drill and tap the M6 holes.

Step 5: Caliper

Get some 1/4" cut off aluminum plate stock.
Print out the drawing (Caliper) Make sure it's to scale
Cut the outline of the caliper out
Lay it on the aluminum stock, mark it with a sharpie
Mark the hole centers with a center punch (through the paper)
Cut it with a jigsaw. Metal (cutting) blade, low speed
Keep the saw blade cooled with water

Step 6: Arms

Cut two identical pieces from 1" upright stock
drill R5 (dia 10.0) holes, make sure you maintain dimension 1.4
attach the arms together
mark and drill the rest of the holes while the arms are attached
follow the print (Arm) to perform the rest of the cuts

Step 7: Threaded Block

Remove the threaded rods from the turnbuckle
cut turnbuckle in half as shown on the print (Threaded Block)
Round the edges as shown on the print
Drill and tap M4 threads

Step 8: Threaded Rod

Make a simple welding jig from leftover hang track as shown on the print (Threaded rod)
Cut a window on the Jig to have access to the rod ends
Cut off the turn buckle threaded rod ends (ring, hook), add chamfers
Clamp the threaded ends into the welding jig as shown on the print
Tack both sides, and weld.
Make sure the threads are covered, so they'll not get weld splatter

Step 9: Final Assembly

Consult the print (Truing Stand) for the final assembly
Use the recommended fasteners to join the parts together
Make sure you add the washers everywhere as shown, to have the proper gaps
Assemble the parts, test the movements.
Diasemble, paint, Re-assemble, ENJOY!
If you want to have the calipers move in synchrony you can add a simple mechanism as I've done
I used an old hand mixer. It had stripped gears, but those were just fine for this purpose
I drilled the worm gears to the right size (see caliper print) and glued to the caliper(s)
I cut off the motor shaft, and added a cover plate, and knob.

Step 10: Video

Here is a video of my Truing Stand actuation

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    8 Discussions


    8 years ago on Introduction

    Very nice, but how is it better than the proper bike fork? I use it always, without problem. Yes, I am not a bike fixer, I do the truing only on my own bike.


    Reply 8 years ago on Introduction

    Hola osvaldo, la ventaja de un centrador es, ademas de la comodidad y la capacidad de adaptacion a cualquier rueda y eje, es que con un centrador se puede ver mejor el comportamiento del aro cuando se lo esta centrando y se puedne utilizar herramientas de precision como comparadores de reloj.

    Hi osvaldo, the adventaje of a truing stand is, beside of the comfort and the capaviliti of adapt to any wheel and axle, is that in the truing stand yo can see better the behavior of the rim when you're truing it and you can use presicion tools like a dial indicator.

    (sorry if you can't understood my english, let me now)


    Reply 8 years ago on Introduction

    Gracias, me imaginaba algo así, pero desde mi perspectiva tercermundista es un lujo innecesario, habiendo tantas bicicletas donde poner la rueda... ;)

    Thanks, I thought so, but from my Third World perspective it is an unnecessary luxury, there are so many bikes where to put the wheel ... ;)


    Reply 8 years ago on Introduction

    Algunos lo consideran lujo y otros una herramienta imprecindible, En mi caso, a veces tengo que centrar ruedas de las que no tengo una horquilla con el eje correspondiente (ejes de 12mm, 14mm, 15mm y 20mm) o que el ancho del mismo no me permite montarlo (100mm, 110mm, 120mm, 135mm, 150mm) que son estandars de varios tipos de bicicletas de BMX, Donwhill, MTB, etc.

    Some people consider it a luxury and others an inprecindible tool. In my case sometimes i have to truing wheels with axles that i don't have the matching fork (12mm, 14mm, 15mm and 20mm axles) or that de width of the same don't allow me to mount it in the fork (100mm, 110mm, 120mm, 135mm and 150mm width) those wheels are estandars from some bikes like BMX, Downhill, MTB, etc.


    Reply 8 years ago on Introduction

    Si sos bicicletero, entiendo perfectamente. Yo hago el centrado de las ruedas de mi bicicleta, y ocasionalmente de la de mi hija o alguna otra persona. Pero lo hago con la rueda puesta en la bici.

    If you have a bike workshop, I understand perfectly. I do the centering of the wheels of my own bike, and occasionally that of my daughter or someone else. But I do put the wheel on the bike.


    Reply 8 years ago on Introduction

    Hi. Why would a $250 professional truing stand be better than a bike fork, right? This is not any better, it's something you build, and use for 40 years.


    8 years ago on Introduction

    Este es el mejor centrador de ruedas que vi, es como el Park Tool. Buen trabajo.

    This is the best truing stand that ever seen, it looks exactly like the Park Tool. Nice work. 


    8 years ago on Introduction

    Este es el mejor centrador de ruedas que vi, es como el Park Tool. Buen trabajo.

    This is the best truing stand that ever seen, it looks exactly like the Park Tool. Nice work.