Q: How do I confirm the JS280RT eagle-beak shear perfectly matches my 20-28 ton excavator?
A: JISAN maintains a comprehensive hydraulic database for CAT, Komatsu, Sany, Volvo, and all mainstream 20-28T carriers. Our engineers calibrate this 20 ton shear for excavator to match your machine's exact 280-320 bar working pressure and 180-220 L/min flow rate. This precise matching prevents host machine overheating and ensures the full 2000kN shearing force is delivered safely.
Q: What advantage does the differential acceleration valve bring to this scrap steel rotary shear?
A: Ordinary heavy shears are slow, but the JS280RT eagle-beak shear utilizes a patented energy-recovery speed valve optimized for 180-220 L/min flow, reducing cycle time to just 2.4 seconds. Unlike slower alternatives, this scrap steel rotary shear slices through thick H-beams and ship components instantly, boosting daily scrap yard output by over 30%.
Q: How does the 2450kg Hardox450 body handle the massive 2000kN shearing force?
A: Weighing 2450kg, the shell and upper bracket adopt genuine SSAB Hardox450 wear-resistant steel. As a premium hydraulic excavator shear, it provides extreme rigidity to withstand the 2000kN shearing force without deformation. Cheap competitors use partial thin wear plates that suffer weld cracks within months, whereas our integrated Hardox450 frame ensures long-term structural integrity.
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 excavator hydraulic shear attachment passes 48 lab tests, and bulk replacement parts are always in stock.
Q: How does the JS280RT compare to the JS450RT in terms of cutting capacity?
A: The JS280RT is a demolition shear for excavator models in the 20-28T range, delivering 2000kN of force with a 500mm jaw opening to cut 16mm plates and 360# H-beams. The JS450RT fits 30-50T excavators with 4150kN force for 30mm plates and 420# heavy I-beams. Mounting an oversized shear on a smaller carrier causes permanent hydraulic damage and voids the warranty.
Q: What is the service life of the blades, and how do I maintain them?
A: The double-sided alloy steel blades on this excavator metal shear 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 500mm 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 pressure. As a direct factory, JISAN uses integrated Hardox450 steel and one-piece forged alloy pivot pins, guaranteeing this excavator steel shear will not deform even under the maximum 320 bar hydraulic pressure of a heavy-duty carrier. Official SSAB certificates are provided for customs clearance.
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 16mm plate / 360# H-beam capacity are strictly excluded.
Q: Can it cut concrete, and how does it compare to an alligator shear?
A: Only exposed rebar can be cut; solid concrete is strictly prohibited to avoid edge chipping. Compared to a standard alligator shear for excavator, our eagle-beak design provides a much stronger piercing force for tackling dense steel structures and ship-breaking components. For pure concrete demolition, a hydraulic pulverizer is required.
Q: Why choose the rotating model with a 752mm diameter over a fixed model?
A: The JS280RT functions as a rotating shear with a massive 752mm rotation diameter and 360° continuous rotation. This allows operators to grab irregular girders and vehicle components from any angle in large-scale bridge or factory demolition, 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 runs this equipment on a 24-hour three-shift 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 demolition scrap shears operate underwater in ship-breaking yards?
A: While frequently used in ship-breaking, prolonged submersion of these demolition scrap shears 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 installation covered by warranty?
A: New 20-28T excavators can fit this attachment directly via forearm installation, while refit kits are supplied for older machines. Motor or cylinder damage resulting from self-modified oil circuits that cannot handle the required 180-220 L/min flow is excluded. Standard installation takes 2–3 hours.
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 shear is unmounted?
A: Clean all metal slag, coat the Hardox shell with anti-rust oil, fully retract the cylinders, and wrap the 2450kg 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 JS280RT be customized for OEM orders?
A: Yes. We can customize jaw sizes (larger than the standard 500mm opening) and hydraulic parameters to meet your OEM requirements. 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 2450kg 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 JS280RT eagle-beak shear with various 20-28 ton carrier models. It does not imply official authorization, endorsement, or trademark infringement by these manufacturers.
