The Makita XRH12ZW is the wet-drilling configuration of the XRH12 SDS-Max rotary hammer, providing the water feed provisions needed for water-cooled diamond core drilling through reinforced concrete. With 3.8 ft-lbs of impact energy, 3,400 BPM, and 36V LXT X2 power, it handles the core drilling demands of mechanical and plumbing contractors making sleeve penetrations in concrete walls and slabs. Sold tool-only for LXT X2 users.
What is the wet drilling feature on the XRH12ZW?
The XRH12ZW includes a water inlet connection point that allows a water supply to be fed directly through to the core bit via a water swivel. The water cools the diamond bit during coring, extending bit life and suppressing silica dust at the cutting face.
Can the XRH12ZW be used dry as a standard rotary hammer?
Yes. The wet drilling provision does not prevent dry operation. The water feed can be disconnected and the tool used for standard rotary hammer tasks — drilling, hammer-drilling, and chiseling — in dry mode.
What size wet core bits are compatible with the XRH12ZW?
SDS-Max wet core bits from approximately 1 in. to 4 in. diameter are compatible for concrete sleeve penetrations. Common sizes for plumbing and mechanical work are 2 in., 3 in., and 4 in. OD (outer diameter) wet diamond core sets.
How does the XRH12ZW compare to the XRH10ZW?
The XRH10ZW is a higher-energy model (8.1 ft-lbs, 2 in. concrete capacity) suited to very large core bits and harder reinforced concrete. The XRH12ZW (3.8 ft-lbs, 1-9/16 in. capacity) is more compact and better suited to standard sleeve penetration work in typical commercial concrete construction.
Does the wet drilling capability satisfy OSHA silica dust regulations?
Wet coring is listed in OSHA Table 1 as an acceptable engineering control for silica dust when used with integrated water delivery to the bit. The XRH12ZW configured for wet coring satisfies this requirement when the water supply is properly connected and active during drilling.
# Makita 18V X2 LXT (36V) Brushless 1-9/16 in. SDS-Max Rotary Hammer with Wet Drilling (Tool Only) **Model:** `XRH12ZW` **Brand:** Makita **Category:** Rotary Hammer > The Makita XRH12ZW is the wet-drilling configuration of the XRH12 SDS-Max rotary hammer, providing the water feed provisions needed for water-cooled diamond core drilling through reinforced concrete. With 3.8 ft-lbs of impact energy, 3,400 BPM, and 36V LXT X2 power, it handles the core drilling demands of mechanical and plumbing contractors making sleeve penetrations in concrete walls and slabs. Sold tool-only for LXT X2 users. ## Specifications | Attribute | Value | |---|---| | Product Type | Rotary Hammer | | Voltage | 36 | | Platform | LXT X2 | | Chuck Type | SDS-Max | | Max Capacity Concrete In | 1.563 | | Max Capacity Steel In | 0.75 | | Max Capacity Wood In | 1.75 | | Impact Energy Ft Lbs | 3.8 | | Bpm | 3,400 | | No Load Rpm | 290 | | Brushless | Yes | | Tool Only | Yes | | Battery Included | No | | Charger Included | No | | Weight (lbs) | 13.9 | | Warranty | 3-year limited | ## What's Included - rotary hammer with wet drilling provision - side handle - depth gauge Source: https://www.jaspecs.com/makita/rotary-hammer/xrh12zw-makita-36v-lxt-x2-brushless-sds-max-rotary-hammer-tool-only/