scoring a groove around a cone.

[null object]

Hi, I am building a hub for a urathan wheel. The hub is tapered being 3mm smaller diameter at the back than the front.

I would like to score a groove in the hub so the wheel has something to grip when it slides over the hub.

How do I do this? The groove does not have to be a "Thread" as such but it could be applied that same. as the 3d shape is basically a cone. How do I specify a spiral groove around the circumfrence of the hub?

I understand I can say this in comments to machineist but I'd have no idea how to write it concisely.

Also I could create a .25mm groove every 2nd 1mm. but it just seems like a a silly way of doing it.

It's almost like I just need a rough finish on that particular part of the design. Can this be done? What do I need to say to communicate this in my design?

I wish to use the vibration debur and clean up to a matte finish but do not wish to have the goove score affected too much by this.

I hope you understand what I mean. I am ready to send me design but I would really like to add this rough finish or scored groove on the circumfrence of the hub.

Thanks for your time.

[null object]

Pfft - sorry for the poor grammer, Typing this from worm work at 4am! I am a bit brain dead.

[Tech2]

I'm not clear on what you are trying to do but this page might get you in the general direction Revolve.

You should make an attempt and post a file so we can comment further.

[null object]

Hi, I am trying to rebuild this plastic roller skate wheel hub out of aluminum. As you can see in the pic the original hub has a fine groove around it's circumference. This is to help the tire grip the hub and not slip off. (The big groove at the bottom is for a circlip to locate, holding the tire to the hub.)

Here is the original hub clearly showing the grooved circumference.


As you can see in this above pic the groove is not an accurate "thread" pitch or anything, just a simple score into the material to give it a grooved surface to create friction and to grip the wheel.

I do not know how to convey this info as I do not know what a grooved surface like this is typically called in design speak so I do not know how to convey this info to the machinist.


I know I have to modify or attach comments to the machinist to the red line selected in this pic


I could also design in some shallow grooves into this revolve but that just seems like creating more work for the machine when it doesn't need to be so intricate and precise. Also I do not know the best default size a depth for such a grooved surface.

From the original hub picture, I hope you can advise a solution.

Thanks,
Nath

[null object]

I refined the design to include grooves as seen in this file but this changes the cost by $26. As above, is there a cheaper easier way to make this?

[Tech2]

Remove the grooves and add CTM pointing to the respective surface, "Create a grip surface by machining approximately a 50 TPI thread." You can change the number of course.

[null object]

Ah perfect! Thank you.