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How do I tighten the nuts on my bench grinder?

I just bought a used bench grinder with two wheels. When I try to tighten the right wheel the left wheel nut comes loose. There is nothing to put a second wrench on because it just loosens the other nut

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A bench grinder has left handed threads on one shaft and right handed on the other,so that the grinding stones don't unscrew the nut as you grind something.I haven't ever gotten around to getting a bench grinder,but on my father's, I used to just hand tighten the nut,then grab the grinding wheel with my hand while tightening the nut with a wrench.(You don't have to make it real tight,as the wheel pushing against the nut will keep it tight)

Posted on May 05, 2012


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Posted on Jan 02, 2017


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1 Answer

How do I change a grinding wheel to a Wire wheel on my new grinder # 37823

There is a left handed thread and a right handed thread on the arbors.

Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CCW.

Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CW.

Note: Hand tighten the nut, then 1/4 turn.

Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CW.

Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CWW.

For grinding stones:
  • ring test the stone
  • discard the stone if it has been dropped
  • be sure the paper washers are installed on the wheel

GRINDER SAFETY 101 (graphic injury video so be warned)

Feb 14, 2015 | Grinders

1 Answer

How do you change the wheels on this bench grinder

Once you get them snugged a little, you will probably have to hang onto one wheel while you tighten a nut. It's easier if you tighten down one wheel with the other wheel dismounted so you can really grab the arbor shaft.

Do NOT overtighten either wheel - it doesn't need it, and overtightening increases the risk of a catastrophic wheel explosion.

Apr 28, 2014 | Grinders

1 Answer

HOw do I change grinding wheels on a 6 inch Craftsman bench grinder? Thanks.

There should be a guard over the wheel, held by several screws. Remove this. The nut holding the wheels loosen in the same direction the wheels turn so this would be anti-clockwise for the right hand wheel and clockwise for the left wheel. When replacing the wheel, ensure you replace the cardboard or rubber washers on the wheel. These spread the pressure evenly when the nut is tightened.

Apr 25, 2011 | Craftsman Garden

2 Answers

How do you tighten the nuts when changing the wheels on a 6 inch craftsman bench grinder. Thank you...

Clamp the shaft behind one wheel with 'Channelock' or 'Visegrip' pliers, then tighten both nuts. Check the new wheels for 'off-center' running by spinning them with your hand. They may fit the shaft tight enough that there is no centering adjustment--use a 'wheel dresser' (either a stone type or a multi-wheel type) to true up the wheel so that there is no radial wobble. Hope this helps!

Oct 23, 2010 | Craftsman 10" Bench Grinder

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How to stop shaft from turning to remove nut and replace wheel

If you put a wrench on the nut on the other end of the shaft, you have a 50/50 chance that the nut you want loose will come loose. If the wrong one comes loose, you can remove that nut completely (and the wheel) then take the nut with you to the store to buy another one. Then put two nuts back on and tighten them together as a jamb nut. Then try again. If the wrong nut still turns, you have to tighten the pair of nuts together tighter. good luck

Oct 08, 2010 | Craftsman 10" Bench Grinder

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Have tried everything, can't get one of the grinding wheels off.

On a bench grinder the wheels turn towards you. This means the grinding wheel on the right side, has a right and nut, and the left side has a left handed nut. If you're trying to remove the left side turn the nut counter-clockwise

Aug 16, 2010 | Delta Grinders

2 Answers

How do I lock up the axel on my bench grinder to retighten after replacing the wheels? Also what is the torque setting?

Just put a wrench on the nut on the opposite side to hold the spindle. They will both tighten at the same time. Tighten them "snug". The threads are made so the nuts will self tighten or should I say will not come loose due to the way the wheels turn and pressure from use is applied.

Dec 02, 2009 | Delta 23 - 725 8" Industrial Grinder

1 Answer


Below I included a link to the manual for your grinder.
However it will tell you the same thing I'm going to tell you.
Most bench top grinders do not come with a shaft lock. In order to loosen or tighten the retaining nut you need to place a small wooden wedge between the wheel and the metal wheel shroud. This will prevent the shaft from turning. This may seem archaic but it serves a good purpose by preventing the over-tightening of the retaining nut.
Hope this helps.

Oct 15, 2009 | Grinders

2 Answers

How to tighten the nuts on either side of the 6'' bench grinder. I tried hoding he oppisiete side thinking they tightened in opposite directions but no. OR, how to hold the shaft so the nuts can be...

Some models have a hole at the top and under the spark cover that allows for the insertion of a pin or nail to help lock the shaft.
Mine has a hole at the back of the protection plate that allows the shaft to be locked.
Holding the opposing wheel also should allow you to tighten the nut as one is left hand and the other is right hand thread.
The nut can then be tightened
.I dont have a manual on your brand to see what they included to lock this one.

Thankis for using FIXYA

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1 Answer

Delta 23-880 bench grinder

You should be able to hold the grinding wheel with a pair of leather gloves on your hands and lossen the bolt. Look very carefully at the threads to make sure you are trying to lossen and not tighten. Some are left handed threads on bench grinders.

Aug 29, 2008 | Delta ShopMaster 8in Grinder with Light...

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