Seven direct factory-floor records plus Zhonghuan's isothermal salt-bath and controlled-atmosphere heat-treatment routes connect body machining, heat treatment, carbide joining and straightening.
Enter the process archive ↓
Four records follow material removal at the spiral flute and connection end. The camera stays on the actual cutting cycle: feed, clamp, index, machine and unload.
An automated station feeds finished drill bodies, clamps the shank and machines the SDS-Plus connection grooves.
Visible record — Automatic feeding, clamping, indexing, groove machining and unloading are shown in one cycle.
Close-up factory footage of the helical flute being machined into a large SDS drill body.
Visible record — The cutting action, formed flute and removed steel chips are visible.
A close view of automated spiral-flute machining on an SDS drill body.
Visible record — Repeated positioning, clamping and spiral-flute machining are shown in close detail; SDS shank-groove production is covered in the dedicated shank-machining record.
A second enclosed station processes fluted SDS drill bodies at the connection end.
Visible record — Fluted drill bodies, repeated clamping and the enclosed machining cycle are shown; no dimensional tolerance is claimed.
Zhonghuan supports two controlled routes for SDS steel bodies. Isothermal salt-bath treatment uses full-surface molten-salt contact for rapid, uniform heat transfer and a controlled hold. Controlled-atmosphere heat treatment uses an enclosed furnace recipe to manage the thermal curve and limit oxidation or decarburization exposure. The route is selected by steel grade, geometry and approved program.
Salt-bath or controlled-atmosphere treatment is selected against the approved SDS body steel, diameter and impact duty rather than copied across every SKU.
Bath temperature and hold, or furnace zones and protective atmosphere, are controlled with transfer time and load density to limit gradients, oxidation and distortion.
Release is based on the approved cycle record, hardness by inspection zone, straightness/runout after cooling and the project sample plan. Temperatures, salt chemistry or furnace atmosphere, zone times and holds remain tied to the approved alloy and geometry.
Zhonghuan uses two current brazing routes for carbide-insert drill bits. The premium continuous controlled-atmosphere mesh-belt furnace supports stable volume production with the cleanest, most uniform joint appearance; nitrogen-shielded high-frequency induction brazing supports selected standard professional programs with a flexible production cycle. Full-carbide-head programs are presented separately under the RFW construction.
The carbide-head joint is heated by high-frequency induction while nitrogen shields the brazing area from the surrounding atmosphere.
Visible record — The induction coil, controlled heating cycle and glowing joint area are visible.
Still · 06 A continuous mesh-belt furnace carries assembled carbide-tipped drill bodies through controlled preheat, brazing and cooling zones under a protective atmosphere for repeatable volume production.
Visible record — The mesh-belt feed, enclosed multi-zone furnace and independent temperature controls are visible.
The final record shows automated loading, rotary holding and a controlled correction cycle—the finishing sequence used to bring drill-body straightness into the project inspection workflow.
Visible record — Automated loading, rotary holding and the straightening cycle are shown; no numerical runout tolerance is claimed.
From forming and isothermal salt-bath heat treatment to brazing and straightening, this archive shows the equipment, workflow and process discipline behind Zhonghuan SDS production. For OEM programs, cycle evidence, joint requirements and inspection scope are aligned with the approved specification.
Connection type, diameter range, working length, head geometry, packaging and target market are enough to begin.
