Gilmer belt alignment

[HopefulSSer]

Yes this is all gilmer. Second pic -- offset bush is fully inserted and against stop screw and washer. There's a little boss cast onto the housing and that's where the screw sits when tight. In that pic I've less-than-fully inserted the bearing into the bush to move the belt inboard on the drive sleeve cog. That's what gives me the 1/8" or so of clearance you see in the first pic (as compared to the original pic in the first post).

Here's a pic that shows the boss cast into the housing. I'm tempted to remove it but I'm sure it's there for a reason so I will leave it be. But removing it would move the bush in the direction I feel it needs to go.

In this pic, based on Ed's comment, I've inserted the bearing almost fully into the bush. It's still not quite where it would like to sit based on the groove in it and the point on the grub screw. But with it set like this I still get a tiny whiff of air between the belt and shoulder of the drive sleeve cog so I think I will run it like this and see what happens. The belt still sits funny on the idler cog but not much I see to do about that.

IMG_6316.jpeg (187.07 KiB) Viewed 1452 times

[chapmanruss]

HopefulSSer,

I have been on vacation so let me add my comments a little late. The Gilmer Belt does ride next to the edge as shown in your earlier picture. Looking at different Gilmer Drive Sleeves I have seen that wear pattern on both non-clutch and clutched Drive Sleeves. Re-aligning the Idler Sleeve will affect the alignment of the belt to the motor as well as the speed adjustment. As far as wear to the edge of the Gilmer belt rubbing against the edge you are more likely to break the belt from other causes, especially on a non-clutch Drive Sleeve, before any wear there can become an issue. Most Gilmer Drive Sleeves are the clutched type as that was an early change during their first year of production.

[HopefulSSer]

Thanks! As I said earlier in the thread, I wasn't sure if it was normal or not but it looked odd. But since it's normal then I won't worry about it.

[markf]

Similar to the original post in this thread, my gilmer belt seems to ride at the edge of the cog. But it also looks like my cog is quite worn. So, I'm looking for advice! (Edit: Not confident it's really a Gilmer drive issue, made a more general post about the idler sheave being loose. Also ran across some other threads about Gilmer wear: Bill Mayo's comments about wear and alignment seem most comprehensive, this unresolved thread showing similar Gilmer drive wear and this one suggesting it's not too bad.)

I bought this greenie about a year ago, and it's generally been working well. I've used both slow (jig saw) and fast (table saw) functions. Today I was trying out routing for the first time, but after a minute at high speed (slightly above table saw) I saw faint smoke coming out of the headstock, and then the motor stalled (humming but not turning). The drive hub was almost too hot to take off when I went to open it up.

The sheaves did need oil (moved back into position very slowly), but the V belt seems to be just over 1/2" wide at the outer edge, so I think it's not too worn. But (as pictured) the gilmer belt seems to be pressed to the side strongly enough to curve the edge up slightly, possibly because of the wear on its side of the cog. With the case open, when I run it at high speed I actually see the occasional spark near the gilmer belt. I can't tell exactly where it's coming from. But when I stop/unplug again, the gilmer belt is very hot, whereas the V belt feels only warm. (Please correct my terminology if I'm messing it up: V belt goes between the sheaves, gilmer belt is much shorter/wider and in different models would be the poly-V belt?)

Anyway, I'm wondering can be fixed, or what needs replacement. Is my cog worn beyond use, and maybe that's why the gilmer belt is pressed to the side? Thanks for any recommendations!