Need Help!- SX3 high speed pulley ???

[cjdavis618]

I can't ever get any return e-mails from Syil America (Richard) so I have decided to build my own high speed setup on the Sx3 I have.

Does anyone know the pulley info and the belt size that replaces the original. I know that Neil has one but I though maybe someone has documented what the sizes are on the belt and toothed pulley for the motor side.

I'm guessing it is a 1:1 pulley and matches the spindle pulley, but I want to be sure.


Thanks
Chris

[Crevice Reamer]

Hi Chris! I would guess that also. I can't WAIT to see what you come up with. We sure need it.

CR.

[cjdavis618]

I replaced the spindle bearings recently and the loads and rpm ratings on the lowest one was 10k. If I can get this info, I plan to take this to 6k or so. I think maybe Pizzamker has already done this with his. Maybe he can give us some guidance.

[Crevice Reamer]

Wow! Can you give part numbers and source for those bearings please?

CR.

[cjdavis618]

Here is the post with the Bearing numbers, I used these to purchase what I have.

http://www.cnczone.com/forums/showthread.php?t=50760

Oddly, during my search for the spindle bearings, I also found someones pic of the upgraded speed pulley.

It is here.
http://www.cnczone.com/forums/showthread.php?t=45155

Thanks old megawatts.

[Crevice Reamer]

Thanks! So, did you get the regular bearings or the $127 angular contact bearings?

CR.

[cjdavis618]

I did the whole thing. Honestly though, the press fit back into the shaft took a lot more effort than I had hoped. I used a hydraulic press to get the shaft back in to where it was, and it didn't go in easy.

I packed the bearings with high temp bearing grease and it did seem to help.

also, I had to use the original race at the spindle, there is no way to get that out of the shaft housing. Not without major destruction. That in my opinion was a bad (read Throwaway) design.

[cjdavis618]

I have started the build on the pulley and High speed mod.

I am using Aluminum round stock for it. I had some 3.5" 6061 that needed a purpose anyway. I will post a cad file of the pulley and the details of the belt, etc once I make sure all specs are correct.

I got the bare stock turned down and bored for the shaft. All I like now is to cut the grooves on the sides and then broach the keyway. Then it is 3x00 RPM..... (well, as soon as the longer belt comes in. lol!)

I do know that the belt is a 5mm pitch and that the pulley has 45 grooves. Measurements indicate that the new belt is going to be a 95 tooth belt. We will see when it gets here.

Now that I finally got my 4th axis finished a couple of days ago, this will be a good test for it. The real fun begins.

Original belt is a 5MM pitch, 20mm wide, 400series 80 tooth belt for reference.

[extrapilot]

Earlier this year I purchased the pulley speed upgrade kit from Syil for the SX3. I had to; I think I looked everywhere, and could not find a 'stock' pulley for this application (bore/tooth spacing). It is amazing how these 'mass production' machines never seem to employ mass produced parts! Seems like maybe they had a deal on 100K spindle motors, except they were some random shaft OD and key width, etc, so they figured- cheaper to run some pulleys than to retail the motors...

Anyway, it is a great upgrade if you are using 1/4"-3/8" cutters in Aluminum or similar. It is still slow for 1/8" cutters, or higher speed maching with carbide cutters, etc.

If you need some data/pics, let me know. Strange, I had recently written to Richard at Syil, and never heard back either. I hope things are OK with him.

Regards,

[Crevice Reamer]

This is the $300 upgrade? what all do you get for the money? Does this allow control of spindle speed down to zero by Mach3?

CR.

[cjdavis618]

No, it is a little under $100. All it does is replace the motor shaft pulley and belt that is on the stock SX3.

[cjdavis618]

Originally Posted by extrapilot Strange, I had recently written to Richard at Syil, and never heard back either. I hope things are OK with him. Regards,

I hope all is well with him also. I had sent him at least a couple of e-mails asking to buy something from him. I know the shock was at least 3 e-mails. I was ready to buy the speed upgrade kit and also the factory shock lift. I just needed payment info.

Instead I wound up making the counter weight and now the Spindle pulley because I couldn't get a response. I would say that it could have been filtered by spam, but there were also 2 PMs from this board to him that went un-answered.


Oh well, I gave my money to someone else.




I think that Syil should have contacted Little Machine shop as a retailer. I think he could really move some products for them. It would be a one stop shop for parts and machines. That would be great.