Question about Bosch 1800 4 1/2" Angle Grinder Cutoff

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Misplaced my angle grinder's inner disc flange

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If you use a nut, the arbor nut will not hold your grinding/cutting wheel properly and you'll use up threade the arbor nut needs to tighten. What you need is the clamping flange, Bosch part number 3603340501. If you have a tool repair center near you they may have one or can order you one. If not, you can get one on sites like www.ereplacementparts.com.

Posted on Dec 19, 2012

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Hi...I have a Black and Decker 4247 angle grinder that I haven't changed the disc on in YEARS...I can't remember if the clamp nut is right hand threaded or left...please help! Thanks lots!


Which ever way your grinder spins when turned on is the same direction the lock nut has to be turned to remove it. This makes sure it's self tightening when in use. More often than not they're right-tight, left-loose.

Nov 26, 2011 | Saws

1 Answer

I have a D28110 angle grinder and I want to use a 1/8"cutting disc with it. Do I need a different guard than what it came with?


haven't heard of a different guard for the cutting disc you want to use. Most people remove the guard when using them

Sep 15, 2011 | Dewalt D28110 Heavyduty 412" Small Angle...

1 Answer

I need replacement brushes for a B & D 7750 4.5" grinder and can't find a source. Any ideas? Thanks.


This is considered a throwaway tool when any internal parts break or wear out, including the brushes. It's usually cheaper to buy a new one as opposed to repairing one. If it's still within the warranty period, B&D will replace it or prorate the value depending on how long you've had it. The only replacement parts available for this grinder are the side handle, blade guard, the inner and outer flanges and spanner wrench.

Dec 18, 2010 | Black & Decker 7750 4 1/2'' Small Angle...

1 Answer

I have a dewalt 4 1/2", 120V angle grinder. I am breaking the thin cutting wheels when I use them very quickly or I pull out the stamped metal ring in the center of the cutoff wheel. The RPM rating...


If you are using these disks you need to apply very light pressure with the angle grinder and ensure you aren't putting any side pressure on the side of the disc.
Also imagine a line at a tangent to the disk. This should be kept at a shallow angle to the work piece to prevent the edge of the metal digging into the cutting disk.
As a rule of thumb you have the correct angle when the sparks are flying at less than 30 degrees back towards you.
Also make sure the retaining flange nut on the angle grinder is the correct way around to grip the disk, sometimes the nut has to be reversed to grip grinding discs.

Nov 24, 2010 | Dewalt Welding Tools

1 Answer

Makita Angle Grinder not working


check inside for any loose connections plus check the brushes. if like you say it is smoking it could be a trip to the wheelie bin for that one.

Jul 29, 2010 | Makita Angle Grinder 4.5" 9524NBX

1 Answer

Breaks support rings in all blades


are you using the proper inner blade flange?? that is the only thing that I can think of that would cause your problem

Jun 12, 2010 | Makita 9553NB 4" Angle Grinder

1 Answer

I have a brand new Grinder 230mm and now need to change the grinding disc however I cannot get the locking flange off - I have detroyed one spanner, and purchased a stronger one, but still no good. can...


Try turning it the opposite way. Instead of loosening it, you may be tightening it. Reverse threads on these machines are necessary to keep the flange from flying off by itself. Joe

Apr 12, 2010 | Black & Decker 9"/230MM 5,000 Rpm Large...

1 Answer

Angle grinder issue


Do you have the securing nut on the correct way? Basically the inner surface of the nut needs to be flat against the blade for it to work correctly and hold the cutting disc in place Usually the nuts are reversible to fit either flat discs or rounded disc heads. It's either that or you do not have the right size bore on the diamond disc for your grinder.

Jun 15, 2009 | Black & Decker 4 1/2" Small Angle Grinder

1 Answer

How to change a cutting disc.


You can download a manual for a 9" unit (9069S) from
http://www.materielsektionen.dk/skabelon/pdf/359.pdf

I know it's a Danish site, but the manual itself is multi-lingual and includes English.

Dec 03, 2008 | Makita 9069 9" Angle Grinder

3 Answers

Unable to loosen flange to remove disc on angle grinder


What sort of disc do you have on there at the mo? If its just an abrasive disc the easiest way to remove it is to use a hacksaw to cut the disc sideways so that you are actually sawing it out between the lock nut and rear flange. This will release the pressure on the nut. If it is a diamond blade and you have already snapped a pin spanner then I would suggest securing the blade in a vice and using a set of stiltsons/pipe wrench. While in the vice you could also try using a punch in the pin holes to shock it round a bit, then the pin spanner (and leverage if needed).

Nov 08, 2008 | Black & Decker 9"/230MM 5,000 Rpm Large...

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