China Tuck Point Grinding Manufacturer & Exporter

Sandwich blades feature two thin diamond cutting rims separated by a recessed center core. This creates double cutting edges that slice the outer borders of the mortar joint while allowing the interior mortar core to crumble naturally. It delivers up to 60% faster cutting speed, requires less operator pressure, and runs significantly cooler than solid wide segments.

Segment loss occurs primarily from extreme frictional heat melting traditional silver-brazing alloys. At Johnson Tools, our tuck point blades utilize multi-axis CNC laser welding systems that atomically fuse the powdered metal segment directly to the 65Mn alloy steel blank, ensuring weld shear strengths exceeding 4.5 kN even under prolonged dry grinding conditions.

Bond selection is dictated by aggregate Mohs hardness. For soft, abrasive mortar or lime mixes, we synthesize ultra-hard metal bonds (tungsten/cobalt-enriched) to resist abrasive scouring. For ultra-hard cured concrete containing flint, chert, or river quartz aggregate, we formulate soft bronze/cobalt matrices that continuously shed dull diamonds to expose fresh crystalline edges.

Yes. We regularly supply blades with 22.23mm, 20mm, 7/8" bores, as well as 5/8"-11 and M14 quick-mount threaded zinc-alloy or carbon-steel flanges. This allows direct installation onto standard 4.5", 5", and 7" angle grinders with dust-shroud cowlings for silica extraction.