Horizontal Band saw question

[twhite]

Finishing up first side rough-out of wheel. I will finish side one in a few days.

Cutting oil is my blood.

 

[twhite]

I had a bit of time today. I was able to get the main pulley/ Gear cut. I still need to make the hub the will attach. Most likely next week. The gears turned out better than I thought. I will need to smooth out all the edges.

Cutting oil is my blood.

 

[pontiac428]

Wow, that cast plate looks so much better than Craftsman Zamak!

Is the pinion still good? If you re-make the pinion, what material would you consider to engage the aluminum with?

 

[twhite]

I ended up drawing up the pinion. Work will be printing me 2 hopefully. Nylon non glass filled. The existing pinion is just ok. I can debur it so smooth things out. The old pinion does have good engagement to the new ring gear. I received the new bushings so I can install them next week after I bore the bore concentric to the pulley and ring. Ofter I marry the 2 pieces together.


Cutting oil is my blood.

 

[pontiac428]

With wear and quieter operation in mind, I was thinking a plastic would be the way to go. Glass filled nylon is even better, that's a very tough composite.

 

[twhite]

With wear and quieter operation in mind, I was thinking a plastic would be the way to go. Glass filled nylon is even better, that's a very tough composite.

The printing used for the pinion called out 33%GF NYLON for it. The Glass is very abrasive. Regular nylon I am thinking will be much easier on the ring gear. As it is now 6061 Aluminum it will be tougher than the Zamac. So the saw should outlast me.


Cutting oil is my blood.

 

[twhite]

With wear and quieter operation in mind, I was thinking a plastic would be the way to go. Glass filled nylon is even better, that's a very tough composite.

Just thinking. I might see a f I have any Delrin. As I have a solid model of the pinion. I will machine one up and compare the 2 materials.


Cutting oil is my blood.

 

[pontiac428]

Oh, that's 6061? I was assuming MIC-6 because of the size. It's a low load system and the pinion chunk looks large enough that I doubt you'll ever have an issue with delrin. A lot more strength is available with GF nylon, but you probably won't need it. The original was zamak, after all. Zamak does have some respectable engineering properties, so it's not a total joke, but delrin on a 6061 cog should run for a very long time.

 

[twhite]

Oh, that's 6061? I was assuming MIC-6 because of the size. It's a low load system and the pinion chunk looks large enough that I doubt you'll ever have an issue with delrin. A lot more strength is available with GF nylon, but you probably won't need it. The original was zamak, after all. Zamak does have some respectable engineering properties, so it's not a total joke, but delrin on a 6061 cog should run for a very long time.

I used what was available in our remnants. It took longer to machine as I had to drain the coolant last week to get ready to ship. So I had to use air and some WD40. Not ideal but it worked out ok. Really reduced depth cuts and feed rate. I am really going to miss getting to use these machines.

I will post up on the Delrin Pinion if I find some stock.


Cutting oil is my blood.

 

[twhite]

Finished up the drive wheel and they just dropped off the pinion gears. Nice mesh so I can do a test assembly this weekend.

Cutting oil is my blood.