ID HQ SERIES ARMATURE [4100NH] [4"] MARBLE CUTTER SPARE PART - 30170
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Restore Peak Cutting Power — Genuine HQ Series Performance in Every Rotation
The ID HQ Series Armature [4100NH] is a precision-engineered marble cutter spare part designed to restore and maintain the full performance of your 4-inch angle grinder or marble cutter. Built with a high-grade magnetic core, copper windings, and a precision-machined commutator, this replacement armature converts electrical energy into mechanical rotation efficiently and reliably, making it an essential component for any professional power tool repair.
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- Direct-replacement compatibility: The 4100NH armature is purpose-built for 4-inch (100 mm) marble cutters and angle grinders, ensuring a precise drop-in fit with no machining or adaptation needed — minimising downtime on the job site.
- Precision copper winding: The armature features tightly wound copper coils wrapped around a laminated magnetic core, maximising electromagnetic efficiency and reducing heat build-up during sustained cutting operations on marble, granite, and ceramic tile.
- Machined commutator segments: Each commutator is precision-turned and balanced to ensure consistent brush contact, reducing electrical arcing and extending the service life of both the armature and the carbon brushes.
- High-density laminated core: The laminated iron core minimises eddy current losses, translating more input electrical energy into usable shaft rotation — delivering stronger, more consistent torque even under load.
- Heavy-duty construction for professional use: Manufactured to withstand the vibration, heat, and continuous load cycles typical of professional stone-cutting environments, this HQ Series armature is designed for technicians who demand reliability from every spare part.
- Cost-effective repair solution: Replacing a worn or burnt armature with the ID 4100NH spare part (SKU: 30170) extends the life of the entire machine at a fraction of the cost of a full tool replacement — ideal for workshops managing large fleets of power tools.
This armature is supplied as a genuine ID HQ Series spare part and comes complete with the armature assembly ready for installation. It is designed to meet the original performance specifications of the 4100NH marble cutter, ensuring reliable operation from the moment it is fitted.
General Purchase & Comparison Queries
Is this armature compatible with my 4-inch marble cutter or angle grinder?
The ID HQ Series Armature [4100NH] is specifically engineered for 4-inch (100 mm) marble cutters and angle grinders that use the 4100NH motor configuration. It is a direct-replacement spare part, meaning it fits without any modification. If you are unsure whether your machine uses this armature model, check your tool's model number or contact us with your machine details for confirmation.
How does the ID HQ Series armature compare to generic aftermarket alternatives?
Unlike generic aftermarket armatures, the ID HQ Series 4100NH is manufactured to match the original specifications of the tool, including winding resistance, core dimensions, and commutator profile. This ensures consistent torque, lower heat generation, and longer service life compared to lower-grade alternatives that may cause premature brush wear, overheating, or reduced cutting performance.
What is the SKU or part number for this armature?
This armature is listed under SKU 30170 and is part of the ID HQ Series spare parts range. When ordering or referencing this part for repair purposes, use the model code 4100NH along with SKU 30170 to ensure you receive the correct component for your machine.
Product-Specific and Usage Queries
What does an armature do in a marble cutter?
The armature is the rotating core of your marble cutter's electric motor. It consists of a laminated magnetic core, copper windings, and a commutator. When electrical current flows through the windings, it creates a magnetic field that interacts with the stator's permanent magnets, generating the rotational force (torque) that spins the cutting disc. A damaged or worn armature directly causes loss of power, overheating, sparking, or complete tool failure.
How do I know if my armature needs to be replaced?
Common signs that your marble cutter armature requires replacement include: excessive sparking from the brush area, burning smell during operation, significant loss of cutting power or speed, the motor running intermittently, or visible burn marks and damaged windings on the armature itself. If your carbon brushes are wearing out rapidly, a damaged commutator surface on the armature is often the root cause.
Can I install this armature myself, or do I need a technician?
Armature replacement requires basic power tool disassembly skills — including removing the tool housing, extracting the old armature, and re-seating the new one correctly with the brushes and bearings in position. While an experienced DIYer can complete this repair, we recommend having the replacement carried out by a qualified power tool service technician to ensure correct installation, proper brush seating, and safe reassembly — particularly in professional workshop environments.
Problem/Solution-Oriented Queries
My marble cutter is producing heavy sparks and losing power — will replacing the armature fix this?
Heavy sparking combined with power loss is one of the most common symptoms of a worn or damaged armature commutator. When the commutator surface becomes grooved, burnt, or uneven, the carbon brushes cannot maintain consistent contact, causing arcing and voltage drop. Replacing the armature with a new ID HQ Series 4100NH unit restores a smooth commutator surface and correct winding resistance, which in most cases resolves both the sparking and the power loss entirely.
My marble cutter runs but cuts very slowly — could the armature be the problem?
Yes — a partially shorted or open-wound armature can cause the motor to run but with significantly reduced torque and speed. If you have already ruled out worn carbon brushes, a faulty power switch, or supply voltage issues, testing the armature winding resistance is the next step. A shorted winding will show abnormally low resistance between commutator segments, while an open circuit will show no continuity. In either case, fitting a replacement 4100NH armature (SKU 30170) will restore full motor output.
The motor burned out after overloading — is the armature likely damaged?
Overloading a marble cutter — such as forcing the disc through thick stone without adequate relief cuts — causes the motor to draw excessive current, rapidly overheating the armature windings. This can melt the winding insulation and short-circuit adjacent coils, permanently damaging the armature. A burnt smell, discoloured or visibly melted windings, or zero resistance between commutator segments all confirm armature failure. Replacing it with the ID HQ Series 4100NH armature and following correct cutting technique will return the tool to full operation.