Question about Saws

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The blade on my Mac Allister circular saw spins on the spindle when not powered. It appears the spindle nut doesn't tighten on to the blade enough. Should there be a washer either side of the blad

The saw is the 1800w version

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  • Master
  • 843 Answers

Yes, there must be a washer between the blade and the nut. On many saws this washer has a D-shaped hole to match a flat spot on the shaft. The back-side of this washer usually has a recess so that when the bolt or nut is tightened down it presses down on the saw blade, not the end of the shaft. Sometimes these washers are of the beveled spring type. Good luck!

Posted on Nov 07, 2012

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Posted on Jan 02, 2017

SOURCE: I have tried numerous times to undo a nut on my

Am I correct that this is a hand-held saw? Want to make sure of the terminology.

If so, the bolt holding the blade has right hand threads -- meaning it loosens by turning counter-clockwise.

Is there a blade lock? Are you using it?

Posted on Apr 30, 2009

  • 1 Answer

SOURCE: Loose cicular saw and nut tightened fast all the way.

Lester and SCSpriggs,
Thanks for suggesting a solution. I've just managed to solve it with the help of someone in a technical store. We released the nut and found out that the plate that secured the blade in place was back-to-front. The side that should have faced inside has a bevelled edge and this was causing the loose contact of the blade that wobbled. So thanks anyway for your advice.

TaskerGHM

Posted on May 31, 2009

  • 670 Answers

SOURCE: craftsman # 315,10851 7 1/4 inch circular saw.

In the past I have clamped a pair of vice grips on the old blade so I could remove the bolt from the arbor.

Posted on Sep 12, 2009

  • 5603 Answers

SOURCE: ryobi 18v circular saw owners manual - blade is loose!

Usually there is a button to press that locks the shaft arbor and then you use a wrench to tighten OFTEN is a left hand thread!

Check for lock button behind the blade guard toward the motor.

Posted on Sep 28, 2009

Testimonial: "Thanks; that's the advice I got when I tracked down the number to call Ryobi. However, it doesn't seem to be working. Now sure what is wrong :("

rowdy45176
  • 2176 Answers

SOURCE: I can't tighten the blade on the saw.

are both flanges in place and on correctly?? That would be the first thing that I would look for.

Posted on Dec 30, 2009

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1 Answer

The blade does not tighten on the spindle and just spins freely. Even tightened down the center nut does not make a good connection to the blade.


There is a positioning "washer" that needs to be in place. If you don't line up the blade and position the washer it will not tighten. The blade will just spin around. Some even have a washer in front and in back. Be sure you have correct diameter of arbor that matches your blade too.

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Why can't the screw be tightened?


First of all, the blade has to be seated correctly on the spindle and the screw hand tightened to hold it in place. Next, a locking device such as a screwdriver has to be inserted crosswise between two teeth to prevent the blade from rotating. With the blade locked, the screw can be tightened. Finally, be sure to remove the locking device before operating the saw.

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1 Answer

Why won't my saw blade go on tight. the mechanism that secures the blade won't tighten down good enough.


You need to make sure the blade is centered properly on the washer on the spindle as you tighten the nut. It can slip off while you tighten the nut. Tighten the nut a little at a time while you wiggle the blade to make sure it's seated properly in the washer.

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Hi i need a parts diagram/exploded view of saw blade for a macallister 1800 circular saw with laser eye .i lent it to a friend and on its return the blade on the spindle spins freely . i saw someone e


MAke sure there is not two reducer washers on the machine, sometimes the old one gets stuck on the back flange and when you fit the new blade it does not clamp properly.

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Circular saw motor turns when tightening saw blade


Insert a tool such as a screwdriver across the blade guard and against a tooth to prevent blade rotation, then tighten the blade nut. Be sure to remove the wedging device before operating the saw

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I have a black and decker CS1000. How do you tighten or loosen blade. There is no spindle lock that I can find.


If you can't find a spindle lock you can unplug the tool and find a piece of wood and put the blade against it and loosen and also tighten the blade, but most newer saws have a spindle lock located in the gear housing somewhere.

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Lost my manual for my 7 1/4 inch circular saw with laser light. Can you simply tell me how to tighten the blade? Thanks Jean


Hi Jean,
Unplug the saw.
# 1: First look for a blade break mine is at the front of the saw.
# 2: Some blades have a hole for a nail.Turn the saw blade down so that you can put a nail through so it catches on the body or Gard when you turn the wrench.
# 3: Use a nail in the gullet : curved space in front of the tooth (o<----nail 9k=to loosen just move the nail to the right side of the blade.My saw doesn't call for total tightening so it wont hurt the motor if it hangs up.If your saw blade has any blue spots it's dull and you need a new one.Thank You for choosing FixYa.com----Darryel

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1 Answer

The blade on my B&D sawcat spins even with nut tightened. cold it be the blade is worn, but i put a new blade on and it doesnt spin as freely but still spins


Hole in the blade is greater than spindle on the saw, you did not put bush washer/reducer in, or if that bit is correct, you are puting holding nut wrong way in.

Do not use saw till you rectify the problem, switch off the saw, remove power cord from socket.

1. raise saw table up for maximum cut
2. retract slide-in protector to maximum
3. remove nut from spindle, following by blade (and bush if used)
4. check internalholding washer if it is correctly inserted.
5. orient correctly internal washer (it have notch or notches and will go freely only one way - check if that is the case)
6. insert blade, with reducing bush if required
7. if external washer is used put it in
8. screw in the holding nut, hand tighten and check mobility of the blade, tighten up about 1/8 to 1/4 turn with spanner, this should be sufficient to hold blade in place without any slipage. If slipage is still present, you are doing something wrong, you need then to supply me with exact model and I will describe exact part look and order in which they must go in.
9. connect to electrical outlet
10. short switch on and off
11. check blade for wandering and slipage, if none then make test cut
12. use as usual if 11 is correct

Hope this will solve your problem :-)

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Can't tighten the blade- it spins


Use a round shaft screwdriver place between the blade teeth to prevent it from turning.

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should be a black button between the handle and the guard. Spin the blade until it depresses all the way down and you should be able to loosen the blade.

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