Description
Weld prep crews lose valuable billable hours searching for misplaced spanner wrenches during abrasive disc changes. The Makita 40V max XGT 5in X-LOCK Grinder delivers 8500 RPM wheel speed with tool-free disc changes. Forcing thick grinding hubs into narrow root passes causes rotational slip, triggering electronic feedback circuits that halt motor power before gear teeth strip.
An alloy steel gearset operates inside an aluminum gearcase, supported by sealed ball bearings to eliminate spindle runout. A 40V max brushless motor integrates Active Feedback-sensing Technology to shut down motor rotation within 0.1 second of a wheel pinch. The specialized X-LOCK tool-free mount clamps compatible discs firm without loose nuts, while an electric brake halts spinning wheels in under 2 seconds upon paddle release.
X-LOCK Rapid Change Hardware Matrix
Click-mount arbor architecture eliminates loose flanges and spanner wrenches during wheel swaps. Electronic feedback sensors monitor spindle speed to protect operators from violent rotational kickback events.
- 40V max brushless motor outputs cutting power comparable to an 11 amp corded angle grinder.
- 8500 RPM no-load spindle speed maintains optimum grinding velocity with 5-inch wheels.
- X-LOCK mounting mechanism permits tool-free wheel changes in seconds with zero loose hardware.
- Active Feedback-sensing Technology stops motor rotation within 0.1 second of wheel bind detection.
- Electric brake halts spinning 5-inch cutting wheels in under 2 seconds after paddle switch release.
- Non-locking paddle switch requires continuous hand engagement to prevent unattended tool operation.
- Removable dust intake screens stop metallic swarf and slag from entering internal motor windings.
Brushless Dynamometer Bench Load Audit
Bench load testing shows that the 40V max motor draws 36 amps continuous from the 4.0 Ah battery pack under heavy feed pressure. Spindle revolutions drop from 8500 RPM down to 7400 RPM under 18 inch-pounds of applied braking torque. Nose housing temperature rises 38 degrees Fahrenheit over ambient after fifteen continuous weld grinding passes. Sound emissions register 81 dBA at idle spin and reach 93 dBA under heavy bevelling on carbon steel plate.
Jobsite Safety Limits Service Directives
X-LOCK mounts require dedicated accessories and will not accept traditional 5/8-11 threaded arbor wheels. Do not force standard threaded wire cups or non-X-LOCK wheels onto this spindle, which destroys the internal spring-loaded clamping jaws. Dropping the tool head onto hard steel decks bends the release lever.
- Blow metallic dust out of motor air intake vents using dry shop air every work shift.
- Clean the X-LOCK clamping mechanism with a dry brush to remove abrasive grit every shift.
- Inspect battery slide terminals for carbon buildup and wipe clean every work week.
Makita Factory Warranty Package Inventory
Makita warrants this XGT cordless tool and charger with a 3-Year limited warranty against defects in materials and workmanship. The kit bag includes the GAG13 grinder, one 40V max XGT 4.0 Ah battery pack, one rapid charger, 5-inch wheel guard, side handle, and operating instructions.
