ID HQ SERIES COIL [5806B] [WITH EXTRA WIRE] [7"] CIRCULAR SAW SPARE PART [Makita Type] - 30374
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Restore Full Power — Engineered for Precision, Built for Reliability
The ID HQ Series Field Coil [5806B] is a precision-engineered circular saw spare part designed as a direct replacement for Makita-type 7-inch circular saws. Built with high-grade copper wire windings and a robust magnetic core, this power tool coil delivers efficient electromagnetic energy conversion, restoring full cutting performance to your machine. Supplied with an extra wire for added installation flexibility, this replacement coil (SKU: 30374) is the reliable choice for workshop technicians and tool repair professionals.
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- Direct OEM-Compatible Fit for Makita 5806B: Engineered to the exact dimensional and electrical specifications of the Makita-type 5806B 7-inch (185mm) circular saw, this field coil replacement installs without modification, eliminating guesswork and reducing downtime during repair.
- High-Purity Copper Winding Construction: The coil is wound with high-conductivity copper wire featuring low electrical resistance, ensuring maximum energy transfer from the power source to the motor. This minimises heat generation under load and preserves motor efficiency over thousands of operating hours.
- High-Temperature Resistant Insulation: Each winding layer is coated with thermally rated insulation that withstands the elevated operating temperatures generated during continuous cutting sessions, protecting the coil from short-circuit failures and extending service life in demanding environments.
- Supplied with Extra Wire for Installation Flexibility: Unlike standard replacement coils, this unit is supplied with an additional connecting wire, giving technicians the flexibility to accommodate different terminal configurations or replace damaged lead wires during the repair process — a practical inclusion that simplifies the job.
- Robust Magnetic Core for Stable Electromagnetic Performance: The laminated magnetic core is precision-stacked to minimise eddy current losses and maintain a consistent electromagnetic field, translating directly into steady, reliable motor torque output whether the saw is cutting hardwood, plywood, or structural timber.
This spare part is supplied as a single field coil unit with an extra wire included. It carries the product reference number 30374 and is compatible with the Makita 5806B 7-inch (185mm) circular saw platform.
General Purchase & Comparison Queries
Is this coil compatible with my Makita circular saw?
This ID HQ Series Field Coil [5806B] is specifically engineered to be compatible with Makita-type 5806B 7-inch (185mm) circular saws. It is manufactured to match the original electrical and dimensional specifications of that platform. If your saw is a different Makita model, we recommend verifying your model number before purchasing. If you are unsure, our team can assist with compatibility checks.
Why choose an ID HQ Series coil over a generic replacement?
The ID HQ Series coil is wound with high-purity copper wire and features thermally rated insulation, ensuring both performance and longevity. Unlike low-grade generic alternatives that may use aluminium windings or substandard insulation, this coil is built to withstand continuous heavy-duty operation. It also comes with an extra connecting wire, a practical inclusion that many generic parts omit, making installation easier and more professional.
What is the product reference number for this coil?
This field coil carries the product reference number 30374. You can use this reference when ordering, quoting, or cross-referencing with your tool repair supplier or parts catalogue to ensure you are ordering the correct component for the Makita-type 5806B 7-inch circular saw.
Product-Specific and Usage Queries
What is included in the package?
The package includes one field coil unit along with an extra connecting wire. The extra wire is provided to give technicians flexibility during installation, particularly when replacing damaged lead wires or adapting to slightly different terminal configurations within the same tool family.
What does the field coil do inside a circular saw?
The field coil is a core motor component responsible for generating the electromagnetic field that drives the armature (rotor) of the circular saw motor. It consists of copper wire windings wrapped around a laminated magnetic core. When electrical current passes through the coil, it produces a magnetic field that interacts with the armature to create rotational force — ultimately driving the saw blade. A faulty or burnt coil results in loss of power, overheating, or complete motor failure.
Can this coil be installed by a general technician or does it require a specialist?
Replacing a field coil requires intermediate-level power tool repair knowledge, including the ability to safely disassemble the circular saw motor housing, desolder or disconnect existing wiring, and reassemble the unit correctly. It is recommended that this task be performed by a qualified power tool technician or an experienced workshop engineer. The inclusion of an extra wire in this kit further aids professional installation by providing a spare lead in case the existing terminal wire is damaged.
Problem/Solution-Oriented Queries
My circular saw has lost power and overheats — could the coil be the problem?
Yes, a failing or burnt field coil is a common cause of power loss and overheating in circular saws. When the insulation on the copper windings breaks down due to heat or age, it can cause short circuits within the coil, reducing electromagnetic efficiency and generating excess heat. If your Makita 5806B circular saw is running sluggishly, tripping breakers, emitting a burning smell, or overheating during use, inspecting and replacing the field coil with this ID HQ Series [5806B] replacement is a recommended first step.
What if the lead wires on my original coil are damaged during removal?
This is precisely why this coil is supplied with an extra connecting wire. During disassembly, it is common for original lead wires to be damaged, brittle, or accidentally cut. The included spare wire allows the technician to replace or extend the terminal connection without needing to source additional components separately, keeping the repair job clean and complete in a single purchase.