iFixit - Answers With Device "Grinder"

Bosch Angle Grinder 601752060 2002: Unlocking the disc when tightly locked

Mon, 04 May 2026 12:39:52 -0700

Important!

What is the solution when the disc tightly locks itself and can't open up with it's normal key?

Other Brand Angle Grinder: Lead shift ,Rewinding 24 bar 12 slot armature

Thu, 16 Apr 2026 05:30:06 -0700

I am rewinding an armature for an old-model metal-bodied Chinese mini angle grinder (approx. 700W-850W, 11,000-12,000 RPM).

Technical Specs:

- Core: 12 slots, 24 commutator bars.

- Dimensions: Core length 55mm, diameter 3.2cm.

- Wire: 32 AWG (0.20mm).

- Winding: Factory was 22 turns/coil (88 wires/slot total), but I plan to use 23 turns/coil (92 wires/slot) to improve torque and heat management.

- Pitch: 1 to 6.

- Progression: Retrogressive (1 -> 24 -> 23).

- Brushes: Positioned 90 degrees from the stator coils.

- Potting: Using two-part submersible pump epoxy (thinned with heat) in a vertical gravity-pour method.

The specific question is about the Lead Shift:

Because I am adding an extra turn (23 instead of 22) and the brushes are at 90 degrees, which lead shift is best to handle the high RPM and field twist?

1. Zero Shift (Bar 1 directly in center of Slot 1).

2. 7.5 Degree Shift (Mica directly in center of Slot 1).

3. 15 Degree Shift (Bar 24, one bar left, in center of Slot 1).

I am leaning toward the 7.5° (Mica Center) shift as a balance, but I'm worried about "fire-ringing" at 11,000 RPM. Has anyone done this specific 23-turn mod on these 12/24 armatures?

By ibot guess, the magnetic shift will ne around 18degree. I can't retrieve any original data of lead shift but from one saved coil, i get continuity from bar24 and 23, assuming first bar in center of slot is bar 1 and winding is retrogressive, connections moving left.

Bosch Angle Grinder 1380SLIM 2011: Why does my grinder not work sometimes wen I power it on

Fri, 10 Apr 2026 12:38:02 -0700

Sometimes grinder does not switch on wen I power it on

Makita Die Grinder 9067L 2010: Why does my angle grinder doesnot work after chaincing the brushes

Thu, 05 Mar 2026 16:48:43 -0700

Why does my angle grinder doesnot work after chaincing the brushes

⟐ Commented March 05, 2026 at 16:48 MST

Bosch Angle Grinder: Bosch 10-125 c angle grinder. What bevel gear set I can use.

Mon, 23 Feb 2026 14:41:15 -0700

I need data of bevel gear set like dimensions of crown wheel and pinion i can use for that model

Angle Grinder: Why the rotor spins but the blade doesn’t

Wed, 04 Feb 2026 05:31:28 -0700

The rotor moves freely forward/backward instead of being fixed.

Blade doesn’t rotate or rotates very slowly.

⟐ Edited by author February 04, 2026 at 5:31 MST

Dewalt Electric Handheld D28402 TYPE 1 2005: Why does my grinder not want to turn when I push the paddle?

Sat, 31 Jan 2026 15:49:11 -0700

When I push the paddle on the grinder it tries to turn on and stops in a second. I have to unplug it a couple of times for it to finally start working

Bench grinder: Where can I get a 4" wire wheel?

Sun, 14 Dec 2025 12:14:37 -0700

I have a 4" bench grinder. Because of space constraints in my workshop I cannot use 5" or 6" wheels. I would like to outfit my bench grinder with various 4" wheels ( wire wheels, buffing and polishing wheels, etc. so I can remove rust , clean parts, and generally refurbrish older mechanical equipment. I had several 4'' wheels a few years ago but have been unable to find any 4" parts in today's world.

Your suggestions would be appreciated

DeWalt DWE4011: Any orbital sander with dust collection that is fixed with screws?

Tue, 25 Nov 2025 07:43:08 -0700

Hi,

I’m asking if there is any orbital sander or random orbital sander with dust collection that I can fix the sandpaper itself with screws from the middle?

I want to fix the sandpaper with screws because if there is any hard stuff (nails or so), the sandpaper flies out.

Regards,

⟐ Commented November 25, 2025 at 7:43 MST

Dewalt Electric Handheld D28110 TYPE 1 2005: I’m not able to route the 110 volt

Fri, 10 Oct 2025 07:24:57 -0700

I replaced brushes and now the 110v incoming power clamp doesn’t fit around the start switch. I’m missing something

Angle Grinder: Grinder name is KEN . It does not work.

Tue, 03 Jun 2025 22:57:31 -0700

How to repair this kEN grinder

Help me

⟐ Edited June 03, 2025 at 22:57 MST

Milwaukee Die Grinder 268020 2009: won't stay running

Thu, 17 Apr 2025 18:35:57 -0700

when u pull the Triger it spins one turn and stops each time u pull the triger

Milwaukee Angle Grinder 288022: Why is my grinder cant turn on?

Sat, 08 Mar 2025 23:07:42 -0700

after push the switch it can turn on only beep.

Meuleuse d'angle filaire Dexter 800W - 800AG2-125.5: Tool smoked and stop working

Sun, 02 Mar 2025 04:31:21 -0700

Under normal conditions and whilst using the grinder to cut thin metal sheet, it suddenly began to smoke and stopped working all together

Bosch Angle Grinder GWS 1350 VSP 2017: Why does it spark lights in the rotor chamber and goes off

Fri, 25 Oct 2024 18:26:03 -0700

It’s always spark lights in the rotor chamber and goes of when ever I switch it on.

Dewalt Angle Grinder D28494 TYPE 1 2014: How to wire a new cord on the switch

Wed, 04 Sep 2024 17:55:56 -0700

Replacing the power cord, which terminal is lead and which is neutral?

Milwaukee Angle Grinder 614631 D03B 2016: How to disassemble spindle hud on 6146 angle grinder

Sat, 08 Jun 2024 17:18:44 -0700

How to disable a single hub on 6146 angle grinder

Grinder: My grinder is stop rotating and motor is rotate the blades are not rot

Fri, 07 Jun 2024 12:35:35 -0700

A grinder blades are not rotate but grinder motor is rotate

⟐ Edited June 07, 2024 at 12:35 MST

Bosch Angle Grinder GWS 1350 VSP 2017: How to change the switch

Tue, 28 May 2024 07:42:46 -0700

My was not work switch how to change switch

Bosch Angle Grinder AG5011VS 2015: Is there a reset on this grinder?

Wed, 22 May 2024 15:02:24 -0700

is there a reset on this grinder?