The Makita XAG13Z1 is a 36V (18V X2) brushless 9 in. paddle-switch angle grinder designed for the most demanding grinding and surface-preparation tasks. Two 18V LXT batteries in series power the brushless motor to 6,000 no-load RPM, and the electric brake stops the large 9 in. disc in 4.5 seconds or less. The paddle switch requires sustained grip for operation, and at 13 lbs the XAG13Z1 delivers corded-class performance from a cordless platform. Tool only — batteries and charger sold separately.
Why is the no-load RPM on the XAG13Z1 lower than smaller Makita grinders?
A 9 in. disc has much more rotational mass (inertia) than a 4-1/2 in. or 7 in. disc. The wheel's outer edge travels at extremely high linear speed even at lower RPM — 6,000 RPM on a 9 in. disc produces a wheel-edge speed comparable to 8,500 RPM on a 5 in. disc. Lower RPM also matches the rated speeds of standard large-format grinding wheels and is actually safer for operator control of the heavier tool.
What are the primary use cases for a 9 in. angle grinder?
The 9 in. disc size is standard for heavy concrete and masonry grinding, large surface coating removal, structural steel prep, and shipyard or heavy fabrication work. For residential and light commercial tasks, a 4-1/2 in. or 5 in. grinder is typically more practical.
What batteries do I need for the XAG13Z1?
The XAG13Z1 requires two 18V LXT batteries (not included with the tool-only version). High-capacity BL1860B (6.0Ah) or BL1850B (5.0Ah) packs are recommended for maximum runtime under heavy load. The XAG13PT1 kit includes two BL1850B packs and a charger.
How does the XAG13Z1 compare to the XAG12Z1 in terms of productivity?
The 9 in. disc on the XAG13Z1 covers 44% more surface area per pass than the 7 in. disc on the XAG12Z1, which translates directly to faster surface preparation on large flat areas. The tradeoff is more weight (13 lbs vs. 11.4 lbs) and reduced maneuverability in tight spaces.
Is the XAG13Z1 suitable for cutting tile or masonry?
Yes, with an appropriate diamond blade rated for the material and an RPM rating at or above 6,000 RPM. The 9 in. disc allows deeper cuts than smaller grinders, making it practical for thick masonry, curb stone, or precast concrete sections.
# Makita 18V X2 LXT (36V) Brushless 9 in. Paddle Switch Cut-Off/Angle Grinder with Electric Brake (Tool Only) **Model:** `XAG13Z1` **Brand:** Makita **Category:** Angle Grinder > The Makita XAG13Z1 is a 36V (18V X2) brushless 9 in. paddle-switch angle grinder designed for the most demanding grinding and surface-preparation tasks. Two 18V LXT batteries in series power the brushless motor to 6,000 no-load RPM, and the electric brake stops the large 9 in. disc in 4.5 seconds or less. The paddle switch requires sustained grip for operation, and at 13 lbs the XAG13Z1 delivers corded-class performance from a cordless platform. Tool only — batteries and charger sold separately. ## Specifications | Attribute | Value | |---|---| | Product Type | Angle Grinder | | Voltage | 36 | | Platform | LXT X2 | | Disc Diameter In | 9 | | No Load Rpm | 6,000 | | Spindle Thread | 5/8 in.-11 | | Brushless | Yes | | Tool Only | Yes | | Battery Included | No | | Charger Included | No | | Weight (lbs) | 13 | | Warranty | 3-year limited | ## What's Included - angle grinder - wheel guard - side handle Source: https://www.jaspecs.com/makita/angle-grinder/xag13z1-makita-18v-x2-lxt-brushless-9-in-angle-grinder-tool-only/