Rebuilding a 10" Standard Modern Utilathe

[quitereal]

Did they put steel pins in, instead of the shear pins? This seems brutal so far. chipped gears and that one gear is literally gone.

Definitely check this

 

[skippyelwell]

No steel or sheer pins, the gear is attached to the sliding boss with 4 machine screws, the sliding boss is keyed to the shaft so the gear teeth are the weak link.
You can see in these 2 pics how the gear is attached, it is a 37 tooth.

@Brent H, thanks for identifying that gear for me and the other info, I'll get you all those dimensions later today. The OD will be an estimate based on the height of the teeth of the matching gear.

 

[skippyelwell]

Looking again at Brent's diagram, the #6 gear doesn't appear to look any different than the other steel gears so the phenolic gear could very well be a repair.

 

[Susquatch]

As a fellow who frequently repairs farm equipment, this is one of four problems I see all the time. Guys make substandard brass, aluminium, or plastic gears instead of steel, or they use regular bolts instead of grade 5 as shear pins, or they put a bigger fuse in, or they apply insufficient or excessive torque. All four are guaranteed problems in the near future.

 

[Mcgyver]

You asked about the belt- it is

B30 (5L330) You can purchase on Amazon or Canadian Tire etc.

Be careful with cheap belts, I've had some terrible ones from Crappy Tire. If the profile is not very consistent, it's like it the belt gets tighter as a wider section travels over the pulley and you get lots of vibration. Take some calipers and measure the width for consistency when buying it or better still stick to quality brands from an industrial supplier or a link belt.

 

[Brent H]

@skippyelwell - the #6 gear is a solid lump of steel and slides onto the drive shaft - held in place with a 3/16 woodruff key I believe. I made it April 3rd 2022 here are some pics.

I should have dimensions drawn up somewhere- I have a few more note books to check.

 

[Brent H]

Here are some pics of the complete gearbox re-assembly. The arrows on the last few pics indicate things to watch for and ensure are in the correct place for assembly

 

[skippyelwell]

OK Brent so that confirms it, my phenolic gear is a repair, the teeth must have been mash up and someone cut the gear down to accept the new replacement.
So why did you make another double gear unit? The original looks to be in usable condition.
Want to sell it???????