Question about Milwaukee Tool Milwaukee 10 Amp Recprocating Saw Sawzall Plus with Quik - Lok Cord

3 Answers

6520 chuck problem

The 6520-21 chuck assembly got wet and started to rust. I sprayed it with WD but the blade holder will not engage. I am able to rotate the "chuck" to insert the blade, but it does not lock and hold the blade. How do I disassemble to clean/lubricate, or do I need to replace parts?

Posted by on


3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,176 Answers

You are both correct about the rust, but as far as the can of worms the rebuild kit for the Quik Lok Blade is about 20.00 and comes complete with DETAILED instructions that will walk you thru it. It takes about 5 minutes and is really easy even for a novice. Dave

Posted on Dec 21, 2008


Thank you very much for responding.
My local repair shop showed me the replacement parts and described how the blade lock mechanism works. Basically, it is a ramp that releases the blade. Somehow (rust I presume) it got stuck on the end of the ramp and would not release. We finally got it unstuck and worked it in. You are right about opening up a can of worms..The replacement kit is tricky as the tech told me.

I agree, WD40 is bad because it may pick up debris and clog the movement-creating the problem all over again. I think I will flush the WD out and lubricate with a dry lubricating spray. Compressed air is a good way to help flush it out.

Thanks again!

Posted on Oct 23, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 314 Answers

Hi, I'm not too struck on using WD40! It cleans down to bare metal and usually adds to the prob. Blow it out with compressed air, moving the chuck back and forth, then add a few drops of 3in1 oil. Try this first before opening a can of worms! LOL Frankster016

Posted on Oct 23, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Sawzall blade keeps popping out on milwaukee 6520-21 sazall.

could be a problem with the quick lok blade system not fully seating or the pin inside is worn and would need replacement. I would first try using some WD-40 or similar and spraying the mechanism to remove any dirst that might be stopping the lock from working, when turned and released it should snap back, if not that is your problem. They are not difficult to replace if need be. Let me know if you need more assistance.

Dec 31, 2011 | Saws

1 Answer

Blade keeps popping out

try lubricating the mechanism with WD-40 or similar the pin also might be worn and need to be replaced, try lubricating first.

Dec 31, 2011 | Milwaukee 6520 21 12 Amp Orbital Sawzall...

1 Answer

The chuck for my reciprocating saw seized up due to rust. It is the turn style chuck. How can I in seize it?

use some penetrating fluid and gently work it back and forth until it frees up, the replacement parts cost around 20.00 if you need them. Let me know if you need more assistance

Sep 12, 2011 | Milwaukee 6520 21 12 Amp Orbital Sawzall...

1 Answer

I'm unable to remove the blade from the quick change something won't release the blade model 6521-21

what you can try is to unplug tool and spray something like WD-40 on the collar mechanism and usually it is simpler for this to remove the pivot shoe and turn the collar and release until you can get full rotation and pull the blade out. There might be some dirt in the release mechanism not allowing the blad/collar to release. This is about the only way without having to remove the assembly. Let me know if you need more assistance

Mar 11, 2011 | Milwaukee 6520 21 12 Amp Orbital Sawzall...

1 Answer

It's actually a Skil model 4280 sabre saw. Problem is it doesn't grip blades properly, so they are constantly slipping out. Chuck seems to be engaged, have shot WD-40 in it - no change. Ideas?

There is nothing wrong with your Skil 4280. The universal U chuck blade is the problem. Look at Lenox blade 4318JC or Disston 5418 and you will see a slight ridge on the face of the blade on both sides where the teeth start and the blade tail engages the chuck. Without the ridge the blade will come out.

Oct 05, 2010 | Bosch Skil No.4280 - 01Variable Speed Jig...

1 Answer

Motor spins, blade doesn't move

Yes it should be covered under warranty, it might not be a shaft breakage. there is a hex nut under the gearcase cover that might have loosened up. But I would take to a repair center first for warranty coverage. If you still have problems let me know.

Jul 18, 2010 | Milwaukee 6520 21 12 Amp Orbital Sawzall...

1 Answer

Blade stuck in keyless chuck on sawzall. pin or spring must be broken. Any suggestions on how to get the blade out

Getting a broken blade our of the sawzall chuck can be difficult and require some ingenuity and patience...
Sometimes there be enough blade left so that you can grab it with a needle nose pliers... othertimes it is flush and that makes it more difficult... holding the chuck in the release position and rapping the saw against a table or with a hammer can jiggle the piece out....of course you have the chuck pointed down while you do that...
Also moving the piece around a bit with a stiff wire and also soaking the chuck and blade with WD-40 helps also....
Usually it will take a combination of these things and some persistance to get the job done...


Jul 14, 2010 | Milwaukee 6520 21 12 Amp Orbital Sawzall...

1 Answer

Bit tighten stuck open

If you mean the chuck jaws seem stuck open, spray around them with some penetrating oil or spray like WD-40, RP-7 or similar and let sit for a couple hours... Then you can tap around the chuck body with a light hammer or spanner etc... just lightly tap... Then if the chuck has an arbor lock to prevcent it from spinning, be sure that is engaged then try to release the chuck jaws. Sounds like they are stuck open through tight friction or rusting on the inside edges (that you dont see). Be careful not to leave them in the fully open position when stored as this is exactly what can happen!

Mar 31, 2010 | Makita 6304LR 1/2" Chuck Electric Drills

1 Answer

Blade does not move when turned on

Try spraying the blade assembly with a good rust remover like PB Blaster or even WD 40. Might be something is rusted and won't let blades move. When you are done trimming reapply some oil to displace any water that comes out of whatever you are trimming.
Good luck

Aug 09, 2009 | Black & Decker Hedge Trimmer

1 Answer

Cuisinart BGB-300

I just got mine to work. It seems that so much water condensation gets into the grinder that there was rust stopping the grinder from moving. Just remove all the parts, especially the blade and basket holder assembly. Take a pair of pliers and twist the grinder stem manually to loosen the rust. Turn it a good number of times and then test it out. I didn't want to use WD-40 on something my wife uses everyday. Good luck.

Aug 10, 2007 | Cuisinart DGB-300 Coffee Maker

Not finding what you are looking for?
Milwaukee Tool Milwaukee 10 Amp Recprocating Saw Sawzall Plus with Quik - Lok Cord Logo

458 people viewed this question

Ask a Question

Usually answered in minutes!

Top Milwaukee Tool Saws Experts

Jim Thurston

Level 3 Expert

672 Answers

Craig Butler
Craig Butler

Level 3 Expert

1723 Answers


Level 3 Expert

2463 Answers

Are you a Milwaukee Tool Saw Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides