EDM Disintegrators and Welding Machines Shanda / Shanghai Shanda

Portable electrical discharge broken tap removers and precision cold welders by Shanda / Shanghai Shanda: portable SD-600D extractors, industrial SD-1000C disintegrators, and original tooling electrodes.

Shanghai Shanda Electronic enterprise and Shanda manufacturing brand

Shanghai Shanda Electronic Technology Co., Ltd. (manufacturing brand Shanda) develops precision electro-discharge machining tools, portable tap disintegrators, and industrial cold welding systems.

Enterprise engineering headquarters and factory in Jiading Industrial Zone, Shanghai
Comprehensive manufacturing process control across EDM and precision welding equipment
Proprietary high-frequency electrical spark erosion impulse generator technology
Dedicated industrial brands Shanda Technology and Mould Doctor for tooling recovery

Portable EDM broken tap removers Shanda SD-600D and SD-600C

Portable electrical discharge tap disintegrators Shanda SD-600D and SD-600C (Shanghai Shanda) are designed for non-contact extraction of broken taps, drills, and studs from M2 to M20 without thread damage.

High-frequency impulse power supply 600 W operating on standard 220 V AC line
Heavy-duty magnetic base for rigid anchoring on machine beds in any orientation
Eco-friendly operation using ordinary tap water as dielectric coolant fluid
Automated motorized spindle feed mechanism with programmable depth control

Industrial EDM spark disintegrators Shanda SD-1000C and SD-1000D

Heavy-duty spark erosion disintegrators Shanda SD-1000C and SD-1000D (Shanghai Shanda) deliver 1000 W output for fast disintegration of large broken tooling and bolts up to M36 and above.

Expanded 1000 W discharge power capacity for accelerated material removal rates
Capable of processing hardened tool steels, carbide grades, and tungsten alloys
Multi-angle articulating work head for vertical, horizontal, and angled operation
Digital process monitor displaying discharge parameters with auto-retract mode

Multifunctional cold welding machines Shanda SDHB-3 and SDHB-5

Multifunctional precision cold welders Shanda SDHB-3 and SDHB-5 (Shanghai Shanda) provide defect repair for molded components, tooling, and precision shafts without thermal distortion or annealing.

Microsecond pulse discharge eliminates excessive heat input to surrounding substrate
High metallurgical bond strength with zero internal stress or micro-cracking
Enables precision deposition on thin sheet edges, cutting dies, and journal journals
Compatible with broad consumables: tool steels, ductile iron, bronze, and aluminum

Mould Doctor precision mold repair welders Shanda SDXB-3

Specialized tooling repair machines Shanda SDXB-3 under the Mould Doctor series (Shanghai Shanda) are engineered for localized micro-overlay repair of stamping and injection mold cavities.

Precision pulse energy calibration engineered specifically for micro-edge build-up
Argon shielding protection completely prevents molten pool oxidation and discoloration
Minimal post-weld machining allowance reducing finishing and polishing cycle times
Ergonomic compact torch holder accessing deep rib channels and complex core profiles

Capacitor discharge stud welders Shanda SD-M10

Capacitor discharge stud welding machines Shanda SD-M10 (Shanghai Shanda) deliver instantaneous bonding of threaded studs and fasteners from M3 to M10 onto thin sheet metal without reverse burn marks.

High-capacity energy storage capacitor bank up to 108,000 uF for repeatable discharge
Ultra-short 1–3 millisecond weld duration preventing burn-through on sheets from 0.5 mm
Eliminates reverse side discoloration, distortion, and need for post-weld cleanup
Reliably welds studs of mild steel, stainless grades, brass, and aluminum alloys

Electro-spark deposition hardening machines Shanda SD-260A

Electro-spark deposition and surface hardening machines Shanda SD-260A (Shanghai Shanda) deposit wear-resistant carbide coatings onto cutting edges, stamping dies, and machine parts.

Deposits cemented carbide micro-layers achieving hardness levels up to 80–85 HRC
Multiplies operating lifetime of metal-cutting inserts, forming dies, and shear blades
Suppresses micro-fractures while imparting high resistance to adhesive and abrasive wear
Versatile electrode selection: tungsten carbide, titanium alloy, and specialized composites

Consumable electrodes, collets, and accessories for Shanda disintegrators

Dedicated consumables and tooling accessories for Shanda electrical discharge extractors (Shanghai Shanda): brass tubes, solid rods, shaped electrodes, ER collets, and coolant pumps.

Hollow brass tubular electrodes from 0.5 mm to 10 mm OD for high-pressure through-flushing
Solid copper and brass erosion rods for core disintegration of broken taps and drill bits
Precision ER collet chucks and quick-change adapters securing electrodes to tool heads
Submersible mini coolant circulation pumps and splash guards for workplace protection

High-frequency electrical discharge erosion mechanics in Shanda SD-600D tap disintegrators

In Shanda SD-600D portable electrical discharge extractors (Shanghai Shanda), the extraction of seized taps and broken tooling relies on localized microsecond spark erosion.

A dedicated impulse power generator delivers controlled pulsed direct current across the gap between an oscillating brass electrode and the broken tool submerged in ordinary tap water.

The micro-arc discharge melts and vaporizes the central web of the broken tap connecting its cutting flutes.

Because the tubular electrode diameter is selected strictly smaller than the internal hole core, discharges never reach the component wall threads, completely safeguarding factory tapped threads. Once the central core is vaporized, remaining flutes are easily removed with hand tweezers.

Hydrodynamic dielectric flushing and ordinary tap water utilization in SD-600D systems

Unlike conventional die-sinking EDM machines requiring expensive petroleum-based hydrocarbon dielectrics, Shanda SD-600D extractors utilize standard tap water.

An integrated self-priming pump delivers water under pressure directly through the axial bore of tubular brass electrodes into the micro-spark gap.

This forced fluid circulation performs three vital tasks: cooling the vibrating electrode tip and workpiece, preventing molten metal re-adhesion, and ejecting disintegrated swarf particles out of the cavity.

Continuous flushing prevents secondary electrical breakdown across settled metal powders and maintains erosion rates up to 1-2 mm per minute.

Electromagnetic clamping mechanics and on-site alignment on heavy machine tools

A primary technological advantage of Shanda SD-600D and SD-1000C machines is performing in-situ repairs without dismantling multi-ton machine beds or engine blocks.

A heavy-duty electromagnetic base provides high magnetic clamping force, securing the rig onto horizontal, vertical, or upside-down ferromagnetic surfaces.

An articulating cross-arm arm with fine micrometer thumbscrews enables operators to align the electrode axis precisely over broken tap cores.

The motorized spindle head automatically controls spark gap distance by monitoring gap breakdown voltage, compensating for progressive brass electrode consumption.

Disintegration parameters for tungsten carbide drills and reamers using SD-1000C units

Disintegrating broken solid carbide tooling such as tungsten-cobalt drills and end mills presents steep thermal barriers that 600 W units may process slowly.

The heavy-duty Shanda SD-1000C unit delivers 1000 W of discharge power, increasing impulse energy density to overcome the high melting point of cemented carbides.

For solid carbide extraction, copper or copper-tungsten composite electrodes operating on reversed polarity are utilized. An advanced digital controller regulates pause intervals between sparks, preventing thermal cracking in delicate parent workpieces while maximizing material removal rates.

Thermodynamics of micro-arc cold deposition and defect repair in Shanda SDHB-3 welders

Shanda SDHB-3 and SDHB-5 precision cold welding machines utilize ultra-short pulsed micro-arc transfers of filler metals.

Because individual discharge pulses last merely millionths of a second, heat rapidly dissipates into adjacent bulk material, restricting joint temperature to 40-50 degrees Celsius.

Absent systemic heat accumulation, repaired zones experience zero residual stress, avoiding brittle martensite formation in ductile iron and hardened tool steels. This prevents structural distortion in stamping dies and enables precision restoration of critical machine shaft journals.

Mould Doctor precision mold repair technology in Shanda SDXB-3 under argon shielding

Repairing injection molds and compression molding dies using Shanda SDXB-3 welders is performed with tungsten electrodes in an inert argon envelope, feeding ultra-fine filler wires from 0.1 mm to 0.6 mm diameter.

Fine pulse energy increments enable localized micro-buildup along chipped mold parting lines without base metal undercutting.

Metallurgical fusion of filler droplets produces a dense microstructure with matching parent hardness. Post-repair machining allowances are kept to hundredths of a millimeter, drastically shortening subsequent polishing and EDM touch-up schedules.

Capacitor discharge stud welding dynamics on thin sheet metal with Shanda SD-M10

Shanda SD-M10 units employ capacitor discharge energy storage with total capacitance reaching 108,000 uF. Depressing the collet welding gun trigger releases stored current through an engineered ignition tip on the stud face, causing explosive vaporization within 1-3 milliseconds.

Gun spring pressure plunges the fastener into the superficial melt pool, creating high-strength bonds across the entire stud flange. The thermal cycle is so brief that the reverse side of 0.5 mm sheet metal remains free of discoloration, burn marks, or distortion.

Electro-spark deposition hardening with tungsten carbide using Shanda SD-260A systems

Shanda SD-260A electro-spark deposition equipment transfers material from wear-resistant cemented carbide or titanium carbide electrodes onto metal cutting edges and stamping tools.

High-frequency electrical discharges in ambient atmosphere drive alloying atoms into the substrate surface to depths of 0.05-0.1 mm.

Treated surface hardness reaches 82-85 HRC with fine carbide microstructures that adhere without flaking. Operating lifespans of stamping punches, shearing blades, and heavy-duty sliding ways are extended by 200-400 percent compared to conventional heat-treated baselines.

What we do not claim

Shanda / Shanghai Shanda and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Shanda / Shanghai Shanda and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.