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Overhead Monorail Shot Blasting Machine
Product Description:
An overhead monorail shot blasting machine cleans hung workpieces continuously: parts travel on a closed-loop overhead chain through a blast chamber, where blast wheels throw steel shot at them from fixed angles. Hooks are spaced at 2,560 mm and travel at 2.44 m/min, so the machine runs as a production line rather than as a batch cycle. Three Q48 models cover 300 kg to 800 kg per hook, with chamber envelopes from φ1000 × 1400 mm to φ700 × 2400 mm. The machine removes rust, mill scale, moulding sand and weld spatter before machining, painting or coating.
How an Overhead Monorail Shot Blasting Machine Works
Conveying. Workpieces hang from hooks on a closed-loop overhead chain at a fixed 2,560 mm pitch. The chain runs at 2.44 m/min on all three models, so loading and unloading happen at static stations outside the blast zone while the parts that are already inside keep moving.
Blasting. Two, three or six blast wheels, depending on model, each rated 250 kg/min on Q483 and Q485 and 360 kg/min on Q4810. The wheels are mounted in fixed positions and aimed at the top, both flanks and the underside of the passing part, so coverage comes from the geometry of the wheel pattern rather than from the workpiece turning. On Q4810 the six wheels deliver 2,160 kg/min of abrasive to the chamber, which is what allows heavy mill scale to come off in a single pass instead of two.
Abrasive circulation. Spent abrasive falls into a hopper, is lifted by the elevator, and is separated from dust and broken media before returning to the wheels. Dust extraction is sized to the wheel count rather than to the chamber volume: 6,000 m³/h on Q483, 10,000 on Q485 and 25,000 on Q4810.
What Continuous Blasting Buys You
Throughput set by the line, not by the cycle. There is no load-blast-unload sequence to repeat. Output follows chain speed and how many parts the operator hangs per hook, which is why the same machine can run one heavy casting per hook or eight small brackets per hook without a changeover.
No part-on-part contact. Parts hang free and never touch each other or a drum wall, so thin-walled castings, machined surfaces and thread forms come out of the chamber in the condition they went in. This is the reason suspension is preferred over tumbling for anything that cannot take an impact.
Repeatable coverage. Because the wheels are aimed rather than moved, the blast pattern is identical for every part that passes the same point on the track. Two parts cleaned an hour apart receive the same treatment, which is what makes batch documentation and coating adhesion predictable.
Abrasive economy. The closed loop recovers, separates and returns the media, so consumption tracks actual wear rather than losses to the floor.
Dust matched to the wheels. The 25,000 m³/h extraction on the six-wheel model is not a margin on top of a smaller figure — it is what the abrasive flow requires.
Q48 Series: Load Capacity, Chamber Size and Abrasive Flow
Model | Max. load per hook | Workpiece size | Abrasive flow rate | Hanger chain speed | Dust extraction air volume | Total power (excl. dust collector) |
Q483 | 300 kg | φ1000 × 1400 mm | 2 × 250 kg/min | 2.44 m/min | 6,000 m³/h | 38.75 kW |
Q485 | 500 kg | φ1200 × 1700 mm | 3 × 250 kg/min | 2.44 m/min | 10,000 m³/h | 58.43 kW |
Q4810 | 800 kg | φ700 × 2400 mm | 6 × 360 kg/min | 2.44 m/min | 25,000 m³/h | 85 kW |
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Product Description
How to choose. Length is the first cut. Above 1.4 m, Q483 is out. Above 1.7 m, only Q4810 fits — and it caps workpiece diameter at φ700 mm. A part that is short and wide, over φ700 mm and under 1.7 m, leaves only Q485 with its φ1200 × 1700 mm chamber. Load capacity follows the chamber rather than leading it: 300, 500 and 800 kg per hook in the same order.
The three models are not three capacity steps of one machine. Chain speed and pitch are identical across the range, so tempo never separates them; what separates them is how large a part the chamber admits and how much abrasive reaches it per minute. Q4810 carries 4.3 times the abrasive flow of Q483 — that is the price of one-pass descaling, not a speed advantage.
Footprint decides as often as the chamber does. Q485 measures 12,235 × 5,410 × 9,411 mm and weighs 18,365 kg, the largest machine in the range, so plant clear height and floor loading need checking before the layout is drawn. Q4810 is the shortest at 4,500 mm but the most abrasive-intensive, and its 25,000 m³/h extraction set takes space the other two do not need.
Where Monorail Blasting Is Used
Foundries and forges cleaning castings and forgings before machining or coating
Automotive components — brackets, housings, suspension arms, brake components
Shafts, axle tubes, pipe sections and cut-to-length profiles
Welded frames and housings cleaned before painting
Heat-treatment shops removing scale after quenching and tempering
Hardware and standard parts processed in high volumes on dense hook loading
Surface Quality and Acceptance
Cleaning is specified against Sa 2½ (ISO 8501-1): rust, mill scale and moulding sand removed, with only light shadows permitted in pits and recesses. Achievable grade depends on abrasive size, abrasive flow and how long the part stays under the wheels, so the grade is confirmed against a sample workpiece before the order, not assumed from the datasheet. Surface roughness, which governs coating adhesion, is set by abrasive grade; steel shot and grit to SAE J444 in the S-330 to S-390 and G-12 to G-16 range covers most coating systems.
Delivery, Installation and Service
Lead time: 35–60 days after receipt of order for standard configurations
Quotation scope: blast system, dust collection system, and wear parts per the model-specific spare parts list
Installation and commissioning: not included; quoted at USD 135 per man-day, overseas travel by the buyer
Warranty: 12 months from the final acceptance certificate, normal wear parts excluded
Response: written reply within 24 hours on any quality issue; engineers dispatched within 7 working days of a written request
Payment: 40% with the order, 60% before shipment; EXW or FOB Qingdao, CIF quoted separately
Voltage: built to destination standard, motor selection confirmed in writing at order
Why KingWo
Qingdao Jinwo Machinery has built shot blasting equipment since 2019, from a 4,800 m² plant with more than 50 staff and an engineering team of over 20, at an annual capacity of 200 sets. Over 1,500 sets have been delivered to more than 1,000 customers in 10+ countries. The company holds ISO 9001, ISO 14001 and ISO 45001 certification valid to October 2028, and CE marking on shot blasting machines, sandblasting machines and dust collectors valid to September 2030. Wear parts for the Q48 range are held in a dedicated export inventory.
Technical Specifications
Q: What is the lead time?
A: Standard lead time is 35–60 days after receipt of order for regular configurations. Non-standard dimensions, export crate packing, peak-season capacity saturation and third-party inspection extend the schedule and are confirmed separately.
Q: What does the quote include?
A: The quotation is a complete set covering the blast system, the dust collection system and the wear parts configured for that model. Ocean freight, insurance, import duties and third-party inspection are excluded. Installation and commissioning is not included and is quoted at USD 135 per man-day.
Q: What is the warranty period, and what is the response time if an issue arises?
A: 12 months from the date of the final acceptance certificate, excluding normal wear parts. Any quality issue receives a written response within 24 hours, and engineers are dispatched within 7 working days of a written request, subject to visa issuance and site readiness.
Q: Can you make it to match our voltage and frequency?
A: Machines are built to the destination voltage and frequency, for example 380 V/50 Hz or 440 V/60 Hz. The exact specification and motor selection are confirmed in writing at order, and power ratings may differ between voltage variants.
Q: Can the chain speed be adjusted? How is the cycle time calculated?
A: Chain speed is 2.44 m/min and hook pitch is 2,560 mm on all three models; both are fixed and not offered as an adjustable option. Tempo depends on how many parts are hung per hook, not on a machine setting — 20 m of usable track carries seven hooks, which is the practical starting point for any capacity calculation.
Q: Is a pit required? What are the requirements for the factory building?
A: The monorail design conveys workpieces overhead and needs no pit. What does need checking is clear height and floor loading: Q485 stands 9,411 mm high and weighs 18,365 kg, the largest footprint in the range, while Q4810 is the shortest at 4,500 mm but requires the 25,000 m³/h extraction set.
Q: Can it handle workpieces longer than 2.4 m?
A: The longest catalogued envelope is 2,400 mm on Q4810. Anything beyond that is designed to order: no model code, no standard parameters and no lead-time commitment until the workpiece drawing and throughput requirement are reviewed.
Q: Can this machine perform shot peening?
A: No. This is a cleaning machine that removes rust, mill scale and moulding sand. Shot peening requires controlled Almen intensity and saturation curves, which is a different machine and a different acceptance basis; raise it separately if the workpiece carries a residual stress requirement.
Q: How does it differ from the spinner hanger type, and which one should I choose?
A: A spinner hanger is a batch machine with one or two rotating hooks; it stops to load and unload, which suits high-mix low-volume work and thin-walled parts that cannot take contact. A monorail machine is continuous: parts travel a closed loop without stopping, which suits a stable, high-volume family of hangable parts. The test is how many different parts you run per day — frequent changeover goes to the spinner hanger, a steady family goes to the monorail.
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