Advice on fixing Delta DC-380 driveshaft

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Forum topic by hawaiiana posted 08-06-2020 06:48 PM 243 views 0 times favorited 4 replies Add to Favorites Watch
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3 posts in 53 days

08-06-2020 06:48 PM

First of all, thanks to CaptainKlutz for the posts about Grizzly replacement parts for the DC-380!

I’ve rolled the dice and ordered a replacement “shaft” (really the primary sprocket driveshaft for the whole planer) based on the schematic from the Grizzly site ( Pg 50, Gearbox P0453Z417).

The guy who sold me the planer must’ve let the outfeed roller rubber cover creep off and press the sprockets out of alignment, which crashed the chain at some point in time. He just re-mounted the chain and sold it to me. But, there must have been a hidden hairline in the shaft, since the sprocket end of it just snapped off during my normal use and the cutterhead quietly stopped spinning.

I didn’t notice the rubber cover was working its way off, so I guess I didn’t do a thorough pre-purchase inspection, huh? :-\

Anyway, I have an actual question: If my unit is a 22-680, are the G0453Z and G0454Z compatible in the gearbox area? The schematic drawing of their shaft sure looks like my broken one…

4 replies so far

View CaptainKlutz's profile


3604 posts in 2347 days

#1 posted 08-07-2020 09:55 AM

Welcome to LumberJocks!

Which thread are referring to, this one?
or this older one?
Have posted a lot of foolish posts on 15” planers?

To answer your question: I doubt the G0453Z is compatible with 22-680, but I do not know for sure.

Let me explain:

Most of the Taiwan made machines I have rebuilt are compatible with Grizzly Taiwan made G1021/G1033 machines. The Chinese made machine I touched was compatible with Grizzly Chinese made G0453/G0454 machine(s).
I know there is width difference between the head castings on Chinese G0453, G0453W, and Taiwan G0550/G1021 made units from Grizzly. The G453 is wider than G0453W and G1021. Do not know if this same difference applies to every other mfg based on country of origin? Have also seen subtle differences between these units in the gearbox. While the bearing sizes are same, the gaskets and oil seals are different. On the Delta 22-675 that I rebuilt, used several g1021 gear box replacement parts.

Hence, have no idea if the G0453 shaft you mention will work?
Did you check if your gear box oil seal sizes and the G453Z are same? That would be my point of reference.

As far as your gear box shaft breaking:
Most older four post 15” planers have one weak spot mechanically IMHO. The out feed drive chain does not have a tension device to remove chain slack, yet the in feed chain does have one. As the chain and sprockets wear, the out feed drive chain gets so loose it jumps off the sprocket. If you are lucky, it just drops off. If not lucky, the cast iron sprocket shatters, chain breaks, or maybe the out feed roller bushing mount breaks or shaft bends.
Your post above is 1st time I read someone breaking a gear box shaft? Would not be surprised if your broken shaft is same chain tension issue? but IDK.

Few persons deal with chains/sprockets enough to quickly recognize when a chain is stretched and worn out. You have to measure it with calipers. Sprockets are easier to see as the teeth become sharp, pointed and tapered sides; not smooth sided with flat top. If you find your sprockets are severely worn, you need to replace the chains also; they wear out and fail at about same time on these machines.
I typically pass on spending money to buy 15” planer if I see the chains/sprockets have excess wear. That suggests years and years of run time, and/or exceptionally poor maintenance. The chain lengths and sprocket tooth counts are also slightly different between the various machines as they have different feed speeds, so it takes some extra research to find the right one(s) on clone models were parts are still available.

Another source of loose chain is the position of the out feed roller. As I shared in another thread, the bushing that hold the feed rollers are soft steel Oilite material. The roller has large spring pushing down, and the chain pulling it towards the gear box. Lack of proper maintenance will result in oblong holes, and less chain tension on the gear box side, aggravating the issue. Oblong bushings look like this:

Grizzly added a second tension sprocket for out feed chain to an older model 20” G1033 (P1033106 + hardware) and the 15” G0453W (P0453W423 + P0453W405 + hardware). The gear box on the G1021 and G1033 use most of same parts, and I added the G1033 tensioner on the 15” Taiwan made machines I rebuilt.

Hope this helps.

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

View hawaiiana's profile


3 posts in 53 days

#2 posted 08-08-2020 01:40 AM

It was the one with the sideways pictures that I read. However the recent one has some good info too. Basically, it was a lightening bolt that Grizzly or Jet would even have compatible parts – so thanks a lot for the insight!

I think my shaft is the G0453Z style, P0453522. I’m hoping so, since on second look, the 1021 and 1033 shaft aren’t very close at all.

I’ve attached shots of the outfeed roller that I suspect caused the crash (gearbox side and pulley side). I think it must’ve just dried up and broke loose. But, I just wonder if there are any other things inside the machine that are likely to have been weakened when the crash happened. =:-o

Unfortunately the rollers for the G0453Z are “serrated steel” not rubber coated.

View hawaiiana's profile


3 posts in 53 days

#3 posted 08-08-2020 01:55 AM

I picked up a little Husky digital caliper. Maybe I’ll try checking the chain for stretch, and take a look to see if I have pointy sprockets. I haven’t inspected them closely yet. Since I have to change the outfeed roller anyway, I might as well drop the bushings now and inspect for egg shape.

I can’t just drive over to the next state to pick up a machine, so the selection in Hawaii is very limited. When this cherry-looking machine with the fancy fold-down infeed/outfeed roller tables popped up on Craigslist, I must admit I got a little overly enthusiastic. I should’ve at least taken a look at the underside.

View CaptainKlutz's profile


3604 posts in 2347 days

#4 posted 08-08-2020 03:01 AM

Unfortunately the rollers for the G0453Z are “serrated steel” not rubber coated.
- hawaiiana

Hmm, Didn’t remember that the G0453z used a serrated out feed roller. Most other Asian made 15/20 four post planers use a solid steel out feed roller. Must be the reason Grizzly offers the T28060 rubber coated roller, long before they offered rubber coating roller for the G1021 models?

The in-feed rollers on all the four post machines are serrated. The serrated roller creates a common surface marking issue for folks new to industrial 15” four post planers. Had a new thread pop up on this topic yesterday you might like to read:

Regardless, Delta 1349339 OEM rubber out feed rollers are still available for Delta 15” planers.

Though they are cheaper at Renovo parts. Renovo has some mixed online reviews, but they have never failed me? My advice is to call them for the order, and check actual stock status. Sometimes the site shows stock sitting in a 3rd party warehouse, and it adds 2-3 weeks for them to order, receive, and ship out. You hear nothing from them while they wait for your parts to arrive, and it proves to be maddening for instant satisfaction part of society. ;-)

There are a number of folks here on LJ that have Delta 15” planers. If you have more questions, post some pictures, maybe change title slightly for the expanded scope; and folks will try to help.

BTW – There is really good tear documentation on how to tear down a DC-380 over at Finewoodworking as they upgrade the head with Helical cutter. Lots of good pictures on the internals for comparison to your machine too. ;-)

Best Luck!

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

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