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Anyone have a chain wheel for a Jet 12hh? - Solved.

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Forum topic by RobS888 posted 04-06-2020 04:51 PM 319 views 0 times favorited 23 replies Add to Favorites Watch
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RobS888

2829 posts in 2578 days


04-06-2020 04:51 PM

HI there,

My planer has been down for 4 months waiting on the part. It is a white plastic sprocket that takes up the slack when running the planer. Places have it to order, but when I call they have to order it from Jet and they don’t have it.

Just hoping someone might have a spare.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.


23 replies so far

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ibewjon

1524 posts in 3526 days


#1 posted 04-06-2020 05:05 PM

Grizzly may have a part to fit. Worth a try.

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MrUnix

7995 posts in 2932 days


#2 posted 04-06-2020 05:06 PM

Do you know the dimensions (O.D., I.D. and width)? That would be pretty simple to make if you have a lathe and some old milk jugs. It’s just an idler wheel, so it doesn’t need to be machined to precise tolerances.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View James E McIntyre's profile

James E McIntyre

723 posts in 2025 days


#3 posted 04-06-2020 06:12 PM

You could ask if any lumberjocks have a CNC that could make one.
I think a LJ a buddy of mine named LittleBlackDuck has one.

I have had your problem with an old delta miter saw and my 1997 Dodge Ram pickup truck.

All the popular parts that break first sell out and they never replace them.

-- James E McIntyre

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RobS888

2829 posts in 2578 days


#4 posted 04-06-2020 06:32 PM



Do you know the dimensions (O.D., I.D. and width)? That would be pretty simple to make if you have a lathe and some old milk jugs. It s just an idler wheel, so it doesn t need to be machined to precise tolerances.

Cheers,
Brad

- MrUnix


It has teeth and it seems it is on the wrong side of the drive wheel, so they wear easily.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

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MrUnix

7995 posts in 2932 days


#5 posted 04-06-2020 07:39 PM

It has teeth and it seems it is on the wrong side of the drive wheel, so they wear easily.
- RobS888

Can’t see any teeth in the photo… but are they really required? If it’s just to take up slack, it should not need to really engage with the chain, just ‘guide’ it – unless it is turning the shaft it’s on or something.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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RobS888

2829 posts in 2578 days


#6 posted 04-06-2020 07:58 PM



It has teeth and it seems it is on the wrong side of the drive wheel, so they wear easily.
- RobS888

Can t see any teeth in the photo… but are they really required? If it s just to take up slack, it should not need to really engage with the chain, just guide it – unless it is turning the shaft it s on or something.

Cheers,
Brad

- MrUnix


actually, the problem is the teeth have worn down, so the chain slips.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

View clagwell's profile

clagwell

208 posts in 525 days


#7 posted 04-06-2020 08:26 PM


It has teeth and it seems it is on the wrong side of the drive wheel, so they wear easily.
- RobS888

Can t see any teeth in the photo… but are they really required? If it s just to take up slack, it should not need to really engage with the chain, just guide it – unless it is turning the shaft it s on or something.

Cheers,
Brad

- MrUnix

actually, the problem is the teeth have worn down, so the chain slips.

- RobS888

The one on my JJP12-HH has no teeth, it’s just an idler:

-- Dave, Tippecanoe County, IN --- Is there a corollary to Beranek.s Law that applies to dust collection?

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RobS888

2829 posts in 2578 days


#8 posted 04-06-2020 08:55 PM

The one on my JJP12-HH has no teeth, it s just an idler:

- clagwell

Thanks!

I thought the teeth had worn off. it makes no sense then why it slips when running the planer.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

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clagwell

208 posts in 525 days


#9 posted 04-06-2020 09:12 PM

What do you mean when you say it “slips”? What problem does this cause when planing a board?

-- Dave, Tippecanoe County, IN --- Is there a corollary to Beranek.s Law that applies to dust collection?

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RobS888

2829 posts in 2578 days


#10 posted 04-07-2020 03:11 AM

there is a lever on the side you move down to engage the planer drive wheels. It started moving up and down and there was a thump each time it moved. The boards wouldn’t feed, but I stopped trying pretty quickly. Jet support said it is always the chain wheel getting ruined. I believed him and ordered 2 and some new belts.

After seeing your picture I realized that probably wasn’t the problem, so I called again and was told it is usually, the pulley mentioned or the large plastic drive gear that is engaged when the lever is lowered.

I took off both back panels and the pulley looks like yours, I have to move it to get back to my 220 outlet tomorrow to watch and see if the big plastic gear is slipping.

Your picture really helped.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

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clagwell

208 posts in 525 days


#11 posted 04-07-2020 10:28 AM

This is what mine looks like when running:

https://youtu.be/7JfTotdtB08

-- Dave, Tippecanoe County, IN --- Is there a corollary to Beranek.s Law that applies to dust collection?

View tvrgeek's profile

tvrgeek

943 posts in 2382 days


#12 posted 04-07-2020 11:19 AM

Looks like just an idler. Probably not your problem. Maybe they break in half and that is why TS said it was your problem. Anyone with a lathe can make one out of Delrin or something.

Wonder if there is a bushing in the linkage that split or something. Tear it apart!

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HokieKen

13514 posts in 1871 days


#13 posted 04-07-2020 02:08 PM

Can’t tell from the photo but, is it possible that plastic idler has worn down enough that it’s no longer keeping the chain engaged with the drive sprocket above it?

-- Kenny, SW VA, Go Hokies!!!

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RobS888

2829 posts in 2578 days


#14 posted 04-07-2020 02:24 PM



Can t tell from the photo but, is it possible that plastic idler has worn down enough that it s no longer keeping the chain engaged with the drive sprocket above it?

- HokieKen


The chain was pretty loose before, but the wheel can be moved about 1/2 an inch or so, so I got it tighter. later today, I’ll test and see if the wheel or sprocket is the problem. The sprocket is $70 and available as opposed to the chain wheel that is $5 and not to be found.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

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HokieKen

13514 posts in 1871 days


#15 posted 04-07-2020 02:41 PM

If it does turn out to be the sprocket, chances are that a standard size and you can probably get it on McMaster or elsewhere by searching for the correct diameter, pitch and bore size cheaper than purchasing from Jet.

If you need an idler wheel, I can make you one of those.

-- Kenny, SW VA, Go Hokies!!!

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