Question about Black & Decker 4 1/2" Small Angle Grinder

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Center nut how do i loosen up the center nut so i cal put a disc in

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There should be a special wrench that goes with the machine to loosen the nut.

Posted on Jun 04, 2010

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I just bought a hand grinder from a guy but don't know how to take the disc off . it has a button u push but no nut on the disc


If there isn't an arbor nut holding the blade/disc on the grinder you have a disc with the threaded center built into it. While holding the arbor lock button down you have to turn the disc by hand until it breaks free and spins off. It may be on vary tight as it is a self-tightening thread so the disc won't come off while you use it.

Feb 22, 2012 | Black & Decker Black And Decker 4-1/2"...

2 Answers

Hi, I'm trying to change the fiber disc on a DeWalt DW402 but after pushing the locking button on top I'm not able to unscrew the wheel. If I turn counterclockwise the wheel turns, but it seems I...


  • 1 Check the grinder before you begin. The newer discs on rotary grinders have patented buttons that allow you to remove the disc without any tools. You may have one like that. In models like this, there's usually a spot to depress and then remove the disc.

  • 2 Turn off the grinder before you attempt to remove and change the disc on your rotary grinder. If it's battery powered, put the grinder in lock position so you can't accidentally turn it on. If it's electric, unplug the grinder from the wall.
  • 3 Look for a nut in the center of the disc. This is a give away that you need to use your special wrench. Sometimes the grinder comes with a tool necessary to loosen and remove the nut. Other times you need to use a wrench.
  • 4 Lock the wheel into place before you begin. You can find a button or switch at the side or back that allows you to do that. When you lock the wheel in place, the disc remains still as you loosen the nut in the center.
  • 5 Remove the nut in the center with either the tool provided with the grinder or a shop tool and lift the disc off your rotary grinder.
  • 6Lift the disc off the rotary grinder. If you have different discs, remember to check for the best fit. Put the nut back on a different way for different discs. Check for a rim and indentation on one side of the nut and a flat side on the other. A visual inspection of the disc for the rotary grinder gives you information about the side to use.

  • Here is a diagram of your grinder and the tool you are looking for is number 50...

    http://www.ereplacementparts.com/images/dewalt/DW402_TYPE_6.pdf

    Jun 11, 2011 | Dewalt 4 1/2" Small Angle Grinder D28402

    1 Answer

    In putting together my 26"


    Loosen both nuts on front wheel.
    Stand bike straight up, or set bike upside down on seat and handlebars.
    With fingers on fork and thumb on wheel, pull wheel so it is centered on fork.

    Now tighten one nut part way. Keep holding wheel.
    You may need somebody to help.
    Then tighten other nut.
    Go back to fist nut and tighten a bit more.
    Repeat back and forth tightening until nuts are tight and wheel is in center of fork.

    Dec 25, 2010 | Schwinn Men's 26" Jaguar Cruiser Bike

    1 Answer

    How do you remove the front wheel of a gl1000 honda goldwing


    Center stand the bike, place a jack under the motor but do not lift yet,unbolt calipers and hang with wires, loosen the four nuts and washers on the bottom of fork on nut looking end of axle(nut should turn but may not be tight), loosen nut on axle, now take off all nuts washers,and pull off two caps. Now slowly jack up motor to rock bike back on center stand, just enough to roll wheel out the front. When putting caps back on make sure arrows on the caps are pointed forward. Also use feeler gauge in tool kit (or eyeball it) to make sure discs are centered in caliper slots and not rubbing against calipers(before tightening eight nuts on fork bottom caps. Also make sure speedo gear is positioned correctly(not binding) and wheel spins freely before dropping wheel. It takes some fiddling around to put this front wheel back on. Minor adjustments are made by spinning the axle nut to adjust fork spacing.

    Sep 02, 2010 | Honda GL 1100 Gold Wing Motorcycles

    1 Answer

    Remove/replace front rotors


    Actually, it’s a bit involved, but you can do it.
    Loosen the wheel lug nuts, raise the vehicle and support it securely on jackstands. Remove the wheel and install two lug nuts with 3mm washers under them to hold the disc in place (if the two disc retaining screws are still in place, this will be unnecessary)
    Remove the brake caliper. It is not necessary to disconnect the brake hose. After removing the caliper bolts, suspend the caliper out of the way with a piece of wire. Remove the two caliper mounting bracket to steering knuckle bolts.
    Remove the driveaxle hub nut. To prevent the hub from turning, put a prybar between two of the wheel studs and against the ground, then loosen the nut.
    Remove the cotter pin and loosen the lower ball joint nut about three full turns. Don’t remove it. Separate the lower control arm from the steering knuckle (you’ll need to get or rent a two-jaw puller for that).
    Swing the knuckle/hub assembly out away from the car and push the driveaxle through the hub assembly until the end of the driveaxle is free of the hub. The shaft on the end of the driveaxle is often hard to dislodge from the hub, so you may have to tap the outer end of the shaft with a soft mallet until it pulls easily out of the hub.
    After the hub and axle are separated, support the outer end of the driveaxle with a piece of wire to avoid unnecessary stain on the CV joint.
    Remove the four bolts that hold thehub and brake disc assembly to the steering knuckle and remove the hub and disc.
    Put a pry bar or something like one between two of the wheel studs to keep the whole thing from turning as you maybe put your feet against the bar, and then remove the four bolts that hold the disc to the hub assembly. Then you will have your disc. Installation is the reverse.
    I hope this helps you. Give yourself plenty to time to deal with it.

    Nov 27, 2009 | 1992 Honda Accord

    1 Answer

    Front left rotor wont release. axle nut is removed hub will not slide


    The following might help you. It is the rotor removal process for your car, most of which you have apparently done:
    Loosen the wheel lug nuts, raise the vehicle and support it securely on jackstands. Remove the wheel and install two lug nuts with 3mm washers under them to hold the disc in place (if the two disc retaining screws are still in place, this will be unnecessary)
    Remove the brake caliper. It is not necessary to disconnect the brake hose. After removing the caliper bolts, suspend the caliper out of the way with a piece of wire. Remove the two caliper mounting bracket to steering knuckle bolts.
    Remove the driveaxle hub nut. To prevent the hub from turning, put a prybar between two of the wheel studs and against the ground, then loosen the nut.
    Remove the cotter pin and loosen the lower ball joint nut about three full turns. Don’t remove it. Separate the lower control arm from the steering knuckle (you’ll need to get or rent a two-jaw puller for that).
    Swing the knuckle/hub assembly out away from the car and push the driveaxle through the hub assembly until the end of the driveaxle is free of the hub. The shaft on the end of the driveaxle is often hard to dislodge from the hub, so you may have to tap the outer end of the shaft with a soft mallet until it pulls easily out of the hub.
    After the hub and axle are separated, support the outer end of the driveaxle with a piece of wire to avoid unnecessary stain on the CV joint.
    Remove the four bolts that hold thehub and brake disc assembly to the steering knuckle and remove the hub and disc.
    Put a pry bar or something like one between two of the wheel studs to keep the whole thing from turning as you maybe put your feet against the bar, and then remove the four bolts that hold the disc to the hub assembly. Then you will have your disc. Installation is the reverse.
    I hope this helps you. Give yourself plenty to time to deal with it.

    Nov 05, 2009 | 1992 Honda Accord

    1 Answer

    Front motor mount on 1993 camry 4 cylinder


    The mount is probably bad anyhow. so get it out however you need to, you can always cut the nut or bolt off and the new mount will have a new stud. so you will only need a nut.

    Sep 23, 2009 | 1992 Toyota Camry V6

    1 Answer

    Remove front forks off harley sportster


    jack up bike so front wheel is off the ground remove brake cal. wire it up out of way.then remove front fender.loosen axle nut and remove and remove wheel then loosen pinch bolt on the thriple trees hang on to fork tubes they may slide out

    Sep 04, 2009 | 2004 Harley Davidson XL 883 Sportster

    2 Answers

    How to remove broken lug on 98 Elantra. Can't get the disc off that lugs press into. Already have removed 4 bolts/nuts that secure this disc to the brake rotor. Also have already removed large castle nut...


    As far as I can determine, your Elantra has standard rear disc brakes.
    The lugs should be attached to the hub, which is attached to the axle. The Disc or Rotor (they're one and the same) slip onto the hub. Oftentimes the disc will seize on the hub from rust. You need to spray the center hole, where the disc goes over the hub, with spray penetrating oil. Also spray the lug stud holes. Then take a (dead blow )hammer and hit the disc around its perimeter. It should then come loose.
    The broken stud can then be taken out by hitting the front of the stud with a hammer. You may want to spray the back of the stud where it seats on the hub before taking the hammer to it. Place the new stud through the rear and make sure it's seated correctly.
    Clean all parts with brake parts cleaner. The lug studs should not have any lubrication on them.
    You have to re-set that "large castle nut" that was removed to its proper Preload Torque. I do not know that spec, but you need to find it out, and how it's done.
    Suggest you purchase a Repair Manual for your vehicle(s). It really is the best tool you can get.

    Aug 11, 2009 | 1998 Hyundai Elantra

    1 Answer

    Remove/replace shock absorber assembly 900s 1995 saab


    1. Slightly loosen hub center nut when all four wheels are on ground.
    2. Raise and support vehicle, then remove five wheel bolts and wheel.
    3. Remove hub center nut, then the wheel sensor,
    4. Press back brake piston using slip-joint pliers,
    5. Remove caliper from steering swivel member, then suspend in wheel housing with cable tie.
    6. Remove brake disc and back plate, then slightly loosen tie rod end nut.
    7. Press out tie rod end nut using puller tool or equivalent.
    8. Remove nut and tie rod end bolt, then the anti-roll bar to swinging arm nut.
    9. Remove outer ball joint nut.
    10. Press ball joint out of steering swivel member using puller tool or equivalent, installed on spring link.
    11. Remove nut and discard. This self-locking nut must not be reused.
    12. Remove three upper mounting nuts for MacPherson strut, then the strut.
    13. Clamp MacPherson strut in vice.
    14. Compress spring using spring compressor or equivalents.
    15. Hold piston rod and remove nut using MacPherson strut socket tool 89 96 662, or equivalent. This is a self-locking nut and must not be reused.
    16. Remove mounting and top spring seat, then the coil spring, gaiter and compression stop.
    17. Unscrew damper using wrench tool No. 89 96 670, or equivalent, then remove damper from strut.
    18. Reverse procedure to install, noting the following:
      1. Screw damper in place using wrench tool No. 89 96 670, or equivalent.
      2. Lower end of coil spring should abut against stop in bottom of spring cup.
      3. Position MacPherson strut on vehicle and install three retaining nuts on top mounting. Tighten nuts alternately, according to specifications.
      4. Always use new hub center nut with self-locking threads.

    Jun 04, 2009 | 1995 Saab 900

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