Even though intermittent rotary drilling at full bore capacity is possible, it’s always better to opt for the next larger rotary hammer if any drilling series requires larger holes. Like any other tool or machinery, constantly pushing a rotary hammer to its extremes will eventually lead to the tool’s failure. It’s also important to select a tool with the right functions. NENZ rotary hammers (SDS-plus) offer three modes of operation: hammer drilling, drilling only and chiseling only. Larger combination hammers typically offer two modes: hammer drilling and chiseling only.
In addition, each rotary hammer incorporates the flexibility to drill larger holes as well. NENZ SDS-plus hammers can handle carbide-tipped core bits 1-3/16" .The exact size core and thru-hole bits are dependent on the hammer size.