Q: How do I confirm the JS380RT eagle-beak shear matches my 20-38 ton excavator?
A: JISAN maintains a comprehensive hydraulic database for CAT, Komatsu, Sany, Volvo, and all mainstream 20-38T carriers. Our engineers calibrate this hydraulic shear for excavator to match your machine's exact 300-320 bar working pressure and 200-250 L/min flow rate. This precise matching prevents host machine overheating and ensures the massive shearing force is delivered safely via the main arm.
Q: What advantage does the boom-mount design bring to bridge and high-reach demolition?
A: By installing directly on the main arm instead of the stick, this boom mount shear significantly enhances leverage. This unique design allows even 20-ton class excavators to operate the 4200kg "380-series" model with extreme cutting force, making it ideal for high-altitude steel beam dismantling and heavy bridge demolition where maximum reach and power are required.
Q: How does the 4200kg Hardox450 body handle extreme structural demolition?
A: Weighing a massive 4200kg, the shell and upper bracket adopt genuine SSAB Hardox450 wear-resistant steel. As a premium scrap metal shear, it provides the ultimate rigidity to withstand the immense leverage stress of boom-mounted operations without deformation, ensuring a significantly longer lifespan than cheap carbon-steel alternatives.
Q: What after-sales support and warranty do you provide for this heavy-duty shear?
A: We offer a global 10-30-824 rapid service (10-min reply, 30-min plan, 8-hour parts dispatch).
12-month: shell, upper bracket, slewing bearing, hydraulic motor, cylinders
6-month: dual valve, pinion gear, speed-up valve
3-month: solenoid valve, pivot pins
1-month: alloy steel blades (breakage covered)
Every unit passes 48 lab tests, and bulk excavator shear parts are always in stock for rapid global shipping.
Q: How does the JS380RT compare to a standard forearm-mounted shear or an alligator shear?
A: A standard 20-ton forearm shear is too light for heavy bridge girders. The JS380RT's boom-mount design provides extreme leverage, allowing mid-size carriers to process ultra-thick steel. Unlike an alligator shear for excavator setup which struggles with thick I-beams, our eagle-beak design provides superior piercing force and a massive 600mm jaw opening for heavy steel structures.
Q: What is the service life of the blades, and how do I maintain them?
A: The double-sided alloy steel blades can be flipped and reused for 3,000–5,000 hours under heavy scrap work. A 1-month warranty covers breakage and chunk peeling. Uniform wear is normal consumable loss. We recommend adjusting the blade clearance regularly to prevent thick structural steel from jamming the 600mm wide jaws.
Q: What sets JISAN apart from cheap alternatives on the market?
A: Low-cost carbon steel frames bend easily at the pivot points under high leverage stress. As a direct factory, JISAN uses integrated Hardox450 steel and one-piece forged alloy pivot pins, guaranteeing this excavator shear attachment will not deform even under the maximum 320 bar hydraulic pressure and extreme boom leverage. Official SSAB certificates are provided for customs.
Q: What is the warranty policy for the Hardox450 shell plates?
A: Free component replacement is provided for original structural cracks within 12 months on the shear head. If a weld crack occurs within 6 months, we reimburse 200 RMB for local welding costs. Cracks caused by using the shear as a hammer, pry bar, or cutting beyond the rated capacity are strictly excluded.
Q: Can it cut concrete, and how does it compare to a demolition crusher?
A: Only exposed rebar can be cut; solid concrete is strictly prohibited to avoid edge chipping. While a demolition shear is designed to slice through the steel reinforcement inside concrete pillars, a demolition crusher is meant for crushing pure masonry. Using this shear on solid concrete blocks will destroy the alloy blades.
Q: Why choose the rotating model with an 806mm diameter over a fixed model?
A: The JS380RT functions as a rotating power shear with a massive 806mm rotation diameter and 360° continuous rotation. This allows operators to grab irregular girders and ship components from any angle at high altitudes, a flexibility that fixed models completely lack. Both versions share identical Hardox450 warranties.
Q: Will the warranty be shortened under 24-hour continuous operation?
A: The standard 12-month warranty assumes an 8-hour single shift. If your scrap yard or demolition site runs this equipment on a 24-hour schedule, the warranty period is halved. We recommend strict 4-hour lubrication intervals and custom thickened Hardox jaws for non-stop heavy-duty operations.
Q: Can the shear operate underwater in ship-breaking yards?
A: While frequently used in ship-breaking, prolonged submersion is not recommended. If used in wet or muddy conditions, immediate full cleaning and greasing are required after each shift. Rust or jamming caused by poor maintenance in watery environments is excluded from warranty.
Q: Is damage from improper boom-mount installation covered by warranty?
A: Boom-mount requires specific auxiliary pipelines routed securely along the main boom arm to the shear. New excavators can fit this excavator shear directly, while refit kits are supplied for older machines. Motor or cylinder damage resulting from self-modified or poorly protected oil circuits is excluded.
Q: Will insufficient lubrication void the warranty?
A: Yes. You must grease all pivot points and the slewing bearing every 4 hours under heavy load. Bearing and pin failures caused by insufficient lubrication are considered maintenance negligence and are not covered under warranty.
Q: What are the cold-weather operation guidelines?
A: When operating below 0°C, perform a 5–10 minute no-load warm-up before cutting to protect the seals and hydraulic motor. Use low-temperature hydraulic oil if temperatures drop below -10°C. Freeze cracks resulting from poor winter maintenance are excluded.
Q: Is surface rust from outdoor rain storage covered?
A: A heavy-duty anti-rust coating is applied before delivery. However, surface rust caused by prolonged outdoor storage in the rain without a protective cover is excluded from warranty.
Q: What is the standard storage procedure when the 4200kg shear is unmounted?
A: Clean all metal slag, coat the Hardox shell with anti-rust oil, fully retract the cylinders, and wrap the unit in waterproof film if stored indoors. Outdoor storage without protection is not recommended for long-term idle periods.
Q: Are hydraulic leaks and slow movements covered under warranty?
A: Factory defects in the Finnish-imported piston motor, valves, and cylinders causing leaks or slow movements are covered for 12 months. Damage caused by self-adjusted pressure settings exceeding 320 bar or contaminated hydraulic oil is excluded.
Q: What voids the 12-month warranty on the slewing bearing and motor?
A: Tooth breakage on the slewing bearing due to insufficient greasing, or motor shaft breakage caused by hard impacts and unauthorized pressure tuning, will void the warranty for these specific components.
Q: What is the lead time for overseas spare parts delivery?
A: Warranty replacement parts are provided free of charge; the buyer bears all freight and tariff costs. Delivery takes 3–7 days from overseas warehouses, 20–40 days by sea, or 7–15 days via air freight for emergency downtime situations.
Q: Can the JS380RT be customized for long-reach boom setups?
A: Yes. We can customize jaw sizes (larger than the standard 600mm opening) and reinforce the main bracket specifically for long-boom setups to handle extra leverage stress. Custom frames still use Hardox450 steel, with a 7–15 day lead time after 3D drawing confirmation.
Q: What is the export process and payment terms?
A: The MOQ is 1 unit, with bulk discounts available for fleet orders of 10+ sets. We accept T/T, L/C, and Western Union (30% deposit before production). The process is: Confirm Model → Issue PI → Inspection → Shipment.
Q: Do export documents include the Hardox certificate?
A: Yes. Full export documentation includes the Commercial Invoice, B/L, CO, RCEP, CE certificate, official SSAB Hardox certificate, and factory inspection report for smooth global customs clearance.
Q: Is rust occurring during sea transit covered?
A: We use full anti-rust packing with desiccants for every 4200kg unit. Any minor surface oxidation occurring during long sea transit or post-delivery outdoor storage is considered normal and is excluded from warranty.
Q: What is the step-by-step warranty claim process?
A: 1. Provide the serial number, a fault video, and hour records. 2. Our engineers determine if the damage is a factory defect or man-made. 3. Free spare parts and video installation guides are provided for eligible claims. 4. Welding cost reimbursement (200 RMB) applies within 6 months.
Q: Does mentioning brands like CAT or Sany imply official cooperation?
A: No. Brand names are mentioned solely to indicate the compatibility of the JS380RT eagle-beak shear with various 20-38 ton carrier models. It does not imply official authorization, endorsement, or trademark infringement by these manufacturers.
