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Field demonstrationI7 · 28 mm
Gray granite-like natural stone
2026-07-11View evidence
Product geometry test program
2-Cutter (Single Carbide Tip) · I7 Geometry Test Program
A dedicated field-demonstration program for Zhonghuan's I7 profiled 2-cutter geometry: one shaped carbide tip forms two cutting edges and a centering point designed to support confident starting, stable tracking and efficient debris release.
Product
Zhonghuan SDS-Max 28 mm 2-Cutter I7 Drill Bit
Internal code
DP1-I7
Diameter / shank
28 mm / SDS-Max
Evidence in topic
2 substrate videos
I7 head architecture
2-Cutter (Single Carbide Tip) · Zhonghuan I7 Geometry
I7 is Zhonghuan's profiled 2-cutter architecture. One shaped carbide tip forms two primary cutting edges and a centering point, designed to support confident starting and straight tracking in non-uniform natural stone. Head symmetry, centering geometry and body straightness work together as one controlled cutting system.
1 carbide tip 2 cutting edges Centering point
Internal design benchmark
≈50%
faster drilling
≈40%
longer service life
Zhonghuan's internal product-development benchmark compared the I7 profile with our earlier basic flat 2-cutter architecture. The approximate gains provide a design reference; project performance is matched to substrate, hammer energy, diameter and drilling depth during sample evaluation.
SDS-Max · I7
Field demonstrations by substrate
2 videos
These application records demonstrate drilling behavior in natural stone with the featured I7 geometry. Send your target substrate, diameter and working depth to arrange a project-specific sample evaluation.
Evaluate the I7 series
Review the SDS-Max range or request I7 samples for your own controlled substrate test.