HELP!!! Mortiser chuck key problem.

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Forum topic by MrFid posted 07-03-2013 06:59 PM 4626 views 1 time favorited 10 replies Add to Favorites Watch
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893 posts in 2384 days

07-03-2013 06:59 PM

Topic tags/keywords: mortiser delta chuck key chuck stuck

Hi all,

So a few weeks ago, I bought a Delta 14-650 (type 1) hollow chisel mortiser for $50 on craigslist. Actually, I was buying a lathe and the guy asked if I needed a mortiser. I threw $50 out there, and he took it. Came with all different size chisels, so I was pumped. There were three chuck keys hanging off the thing, so I assumed one of them would work. Silly.
Come to find out that all the replacement part websites are out of that key, and Delta is in the middle of a transitional period, so no one seems to be able to get one.

Here’s what the chuck says:

Select (looks like a brand) 10mm-3/8” 24 UNF. See attached pictures.

So, here’s my question. Does anybody have an extra chuck key that will fit this thing? I’d happily take it off your hands and pay you for your troubles, OR: Does anyone know where I can get a key for this thing? It seems pretty nonstandard. I brought it to my local used tool store, tried every key there and nothing worked, OR: Can I buy a new chuck for this with a more standard key? What am I looking for to be sure I’ll be able to use the new chuck with my mortiser?

Also interesting to note, the guy who I bought it from had a chisel in the mortiser when I bought it, but doesn’t have the key anymore (I emailed him), so I’m not sure if getting the chuck out will be more of a challenge b/c of this.

Thank you guys for your help. A good question for the braintrust on a day that’s too humid and gross to do any real woodworking.


-- Bailey F - Eastern Mass.

10 replies so far

View pintodeluxe's profile


5975 posts in 3293 days

#1 posted 07-03-2013 07:27 PM

Tool Parts Direct has a chuck key for the 14-650 type 1. I have ordered parts from them for my 14-650 type 2. It is listed as reference #11 on the parts diagram. It is a two-part tool with a chuck key on one end, and an allen wrench on the other. They are a good outfit to deal with, although sometimes the shipping takes a little while.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View MrFid's profile


893 posts in 2384 days

#2 posted 07-04-2013 03:53 AM

Thanks Willie. I called them and they said they were out. They could get it but they quoted me “anywhere between 30 and 120+ days.” Delta’s warehouse movement and sale is holding everything up. A few other places had given me the same answer. For any interested parties who may stumble upon this in the future, I found a replacement key that may work. Awaiting shipping if I don’t post another update on here post a reply I’ll let you know how it turned out.

-- Bailey F - Eastern Mass.

View Bluepine38's profile


3387 posts in 3565 days

#3 posted 07-04-2013 04:16 PM

Looking at your picture, that chuck has an adapter, the round piece with the two flats on it, that is attaching it to drive shaft. The tool Partsdirect shows it as part 9. If that adapter has a standard chuck thread on it, then
it will be easy to put a different chuck on the machine, the 24unf on the side of the chuck could indicate the
mounting thread. Yes, getting the chuck out with the chisel in it will present a challenge.

-- As ever, Gus-the 80 yr young apprentice carpenter

View Fuzzy's profile


298 posts in 4468 days

#4 posted 07-04-2013 04:25 PM

You might try cutting a small brass bar or even a piece of key stock … slightly taper one end of it … stick the narrowed end into one of the slots on the chuck … TAP . TAP . TAP in the proper direction and see if it doesn’t come loose.

Failing that, if you’ve conceded that a new chuck is in order … 2 pair of Channel Lock slip joint pliers will usually get it open, but, it will most certainly do some damage to the chuck.

A good penetrating oil is your friend … if there is rust/scale inside the chuck, it will take more time & force to open it.

-- - dabbling in sarcasm is foolish … if you’re not proficient at it, you end up looking stupid … ... ...

View MrFid's profile


893 posts in 2384 days

#5 posted 07-10-2013 04:06 PM

Hi All.

Update in what will maybe be the past post on this topic.

First, my idiot of the day moment (actually, of the hour probably. I’m an idiot way more than once a day): the guy who I bought this off had 3 chuck keys with it… 2 that were way too big, and one that just wouldn’t fit. The one that wouldn’t fit was the self-ejecting kind (with the spring loaded pin). When I stuck it in, the pin wasn’t retracting, which I didn’t know until I inspected it further. One slam on the ground and the pin was permanently retracted, and the key fit perfectly! So, problem solved.

However, for all who will have the same problem as me down the road: Maybe by the time you read this Delta will have gotten their act together, and you’ll be able to buy the key from them for $25. Waste of money.

After a LOT of research on the internet, there are keys that are compatible with the mortiser in question. Before I solved the pin problem, I had ordered this:

If the link doesn’t work it’s part number 621400-00. $1.28 plus a few bucks shipping made it about a $5.00 mistake. I’ll take the hit.

Although it claims to fit ONLY B&D parts, it worked great with my mortiser, so now I have two keys when a few days ago I had none. Best part is I got to save the chuck. Hope this helps anyone who might stumble upon this page someday!

-- Bailey F - Eastern Mass.

View runswithscissors's profile


3060 posts in 2504 days

#6 posted 11-02-2014 10:40 PM

To which I would add: If you need to replace a chuck, Grizzly not only lists a bunch, they also explain how to determine which one you need.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View firefighterontheside's profile


20514 posts in 2336 days

#7 posted 11-02-2014 10:46 PM

Yeah, that stupid retractable pin thing…I permanently fixed mine too. Pulled it out with a pair of pliers. Now I need a new handle that tightens the back and forward movement of the fence. It’s also spring loaded pot metal. Were should I look for that? Parts direct?

-- Bill M. "People change, walnut doesn't" by Gene.

View MrFid's profile


893 posts in 2384 days

#8 posted 11-03-2014 12:11 AM

Hmm not sure. Mine was included with the one I bought off CL. Good luck, I’d try parts direct like you said or see if ereplacementparts has one.

-- Bailey F - Eastern Mass.

View firefighterontheside's profile


20514 posts in 2336 days

#9 posted 11-03-2014 12:27 AM

Yeah mine had it too, but then I broke it. I’ll look around. Haven’t needed it so I wasn’t looking but I better fix it before I need it, eh.

-- Bill M. "People change, walnut doesn't" by Gene.

View BinghamtonEd's profile


2298 posts in 2849 days

#10 posted 07-01-2015 12:03 PM

Just an update, I was looking for a replacement chuck key for my 14-650 Type 2. I tried the Black & Decker key mentioned above, it did not work for me. Perhaps there is a slight difference there between the Type 1 and Type 2. I did find that the Jacob’s 1/2” chuck (part number 30251) will work if you grind the pilot down to 13/64. I picked this key up at Lowes for $3.

Type 2 chuck key writeup.

I’m not trying to revive an old thread, or threadjack this one, I just think that anyone who’s tried to find a key for these machines can attest to how annoying the search is.

-- - The mightiest oak in the forest is just a little nut that held its ground.

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