A: JISAN holds full hydraulic & linkage database for Sany, XCMG, CAT, Komatsu and all mainstream brands. Our technical team will match the JSM280 mechanical model according to your 20-28T excavator's stick cylinder force and pin distance. Since it is mechanically driven, we ensure the linkage geometry perfectly transfers your host machine's power without overloading the boom.

A: The JSM280 mechanical scrap shear is driven directly by the excavator's bucket cylinder via a robust linkage system. It requires NO separate hydraulic motor, NO speed-up valve, and NO slew ring. This means zero risk of internal hydraulic leakage, extremely low maintenance costs, and a much more competitive price point, making it the ultimate cost-effective scrap shearing machine for daily yard work.

A: Shell and upper bracket of JSM280 adopt genuine SSAB Hardox450 wear-resistant steel. The cutting edges are made of high-hardness alloy steel. As a premium jaw shear for excavator, the mechanical linkage design eliminates the stress on hydraulic hoses, ensuring the structural integrity lasts much longer in harsh, dusty environments compared to complex hydraulic models.

A: Global unified 10-30-824 rapid service: 10 mins customer reply, 30 mins technical plan, spare parts dispatched within 8 hours.
12-month: shell, upper bracket, main pivot pins, linkage arms
6-month: bushings, grease lines
1-month: high-hardness alloy steel blades (only breakage & peeling covered, wear excluded)
Every unit passes strict stress tests. Warranty only covers factory defects.

A: Unlike a flat-jaw alligator shear for excavator which struggles to pierce thick, irregular pipes, our eagle-beak design provides massive penetrating force. And unlike a lightweight skid steer demolition shear meant for small indoor jobs, the JSM280 is a heavy-duty 20-ton class attachment built for serious structural steel and thick scrap processing.

A: Double-sided alloy steel scrap shears blades can be flipped for 3000–5000 hours. Because the JSM280 is mechanical, there are no expensive hydraulic motors or valves to replace, making the long-term ownership of excavator shear parts incredibly cheap and easy to source from our factory.

A: Cheap mechanical shears often use weak domestic steel that bends at the linkage pivot points under 20T+ cylinder force. As a direct excavator shear factory, JISAN uses integrated Hardox450 steel and reinforced forged linkage arms, guaranteeing this china excavator shear will not deform under maximum host pressure.

A: Free component replacement for original crack within 12 months on the excavator shear head. Reimburse 200 RMB welding cost for weld crack within 6 months. Welding guidance offered, all freight borne by buyer. Cracks from using the shear as a hammer or pry bar excluded.

A: Only exposed rebar can be cut. Solid concrete is prohibited to avoid edge chipping. As a demolition shears excavator setup, the mechanical eagle-beak is perfect for tearing through wooden structures, thin metal walls, and grabbing scattered steel beams, but a hydraulic pulverizer is needed for thick concrete.

A: No, as a pure mechanical metal shear for excavator, it does not have a hydraulic slew ring. It relies on the excavator's natural bucket curl and arm movement for positioning. This fixed-head design makes it significantly lighter, more robust, and completely immune to the rotational motor failures common in hydraulic models.

A: Full 12-month warranty for 8-hour single shift. Daily work over 8 hours halves warranty for these demolition scrap shears. Custom thickened Hardox jaws recommended for non-stop work, lubricate the mechanical pivot pins every 4 hours.

A: Mechanical linkages can tolerate dirty environments better than hydraulic motors, but long underwater use is still not recommended. Full cleaning & greasing of the pivot pins is required after underwater work. Rust & jamming from poor maintenance excluded.

A: Installation is extremely simple: just pin the main ears to the stick and connect the linkage to the bucket cylinder. No hydraulic hoses need to be routed to the shear itself. Motor & cylinder damage from self-modified oil circuits on the host machine is excluded.

A: Grease the main pivot pins and linkage bushings every 4 hours under heavy load for your metal shear excavator setup. Premature wear or seizure of bushings from lack of grease is excluded from the warranty.

A: 5–10 mins no-load warm-up of the host excavator below 0℃ to ensure the main cylinder operates smoothly. Cover machine outdoors. Freeze crack from poor maintenance excluded.

A: Anti-rust coating applied before delivery of the scrap metal cutting shears. Rust from uncovered rain storage excluded.

A: Clean slag, coat the scrap iron shear Hardox shell with anti-rust oil, keep jaws slightly open to relieve mechanical stress, wrap waterproof film indoors. Outdoor rust damage excluded.

A: This is the biggest advantage! Because the JSM280 is a mechanical shear, there are NO hydraulic motors, valves, or hoses on the attachment itself. This completely eliminates the risk of hydraulic oil leaking into the environment or dirt intruding into the shear body, making it far superior to a traditional hydraulic shear attachment for excavator in dirty scrap yards.

A: Normal wear of pivot pins and bushings is considered consumable loss and is excluded from the 12-month structural warranty. They are available at cost-price for quick replacement.

A: Free warranty structural parts, all freight & tariff borne by buyer. As a reliable excavator shear supplier, overseas warehouse delivery is 3–7 days, sea 20–40 days, air for emergency 7–15 days. Mechanical parts like blades and pins are extremely fast to produce and ship.

A: Yes, we can customize the linkage geometry and ear widths to fit non-standard or older excavator models. Custom frames still use Hardox450. As experienced mobile scrap shear manufacturers, we provide full 3D drawing confirmation before production for your oem excavator shear needs.

A: MOQ 1 unit, bulk discount over 10 sets. T/T, L/C, Western Union accepted, 30% deposit before production. Process: confirm model → issue PI → inspection → shipment.

A: Full docs including invoice, B/L, CO, RCEP, CE, SSAB Hardox certificate & factory inspection report for global customs.

A: Full anti-rust packing with desiccants for the scrap steel shear. Rust from post-delivery outdoor storage excluded.

A: 1. Provide serial number of the scrap metal shear machine, fault video & hour record; 2. Judge factory or man-made damage; 3. Free spare parts & video guide for eligible claims; 4. 200 RMB welding reimbursement within 6 months; 5. Cost-price consumables offer.

A: Brands only show JSM280 compatibility as an excavator metal shear, no authorization or endorsement, no trademark infringement.