Mechanical Under Crank Shearing
We manufacture high-quality Mechanical Under Crank Shearing Machines to ensure precise and efficient cutting of sheet metal and plate materials. With a strong focus on cutting power, accuracy, and smooth operation, our machines deliver clean shearing performance with high productivity. Robust engineering and customizable configurations meet the demands of modern fabrication, industrial workshops, and metal processing applications.
India’s Trusted Manufacturer of Shearing Machines
Industrial Mechanical Under Crank Shearing for Modern Fabrication
A Mechanical Under Crank Shearing Machine is a precision cutting machine that uses an under-crank mechanism to deliver controlled shearing action for cutting sheet metal and plate materials. Its design ensures consistent force transmission for straight and accurate cuts, making it suitable for light, medium, and heavy-duty shearing applications in fabrication shops, steel processing units, and manufacturing facilities.
Speed
Efficient mechanical under-crank drive offers strong and consistent cutting force for reliable shearing performance.
Precision
Precision-engineered crank mechanism ensures uniform blade travel and accurate cut quality.
Durability
Heavy-duty construction with premium-grade components ensures long service life and dependable operation under continuous use.
Built for Structural Strength & Cutting Accuracy
Mechanical Under Crank Shearing Design & Components
Learn about the frame construction, reinforced beam, clutch system, and precision blades that make the Mechanical Under Crank Shearing machine dependable for consistent sheet cutting and industrial production work.
FRAME CONSTRUCTION
Mechanical Under Crank Shearing machine Frame fabricated from IS-2062 graded. Rolled steel plates. Table and cutting beam are deeply reinforced and fines machine after stress reliving. The interlocked design put the direct support to frame. Thus frames are strain free and eliminate welds at load support. Thus the accuracy of the machine is never disturbed.
SHEAR KNIVES
Knives are manufactured strictly as per standard material of HCHCr/OHNS. Every step from designing metallurgical specifications, heat treatment, grinding and inspection is carefully controlled. The blades are standards are standardized and are easily replaced.
BED
Super strong bed of closed box type construction, Street relieved in a furnace, forms a rigid backbone for the shear and a solid backing for the lower knife. Dovetail slots in front of the bed are provided for front gauge. Slots on top of bed area also provided for machined pas across the bed for convenient setting of front gauge brackets any desired spacing. Depressions in the top at the bed provide ample clearance for fingers in handling sheets narrower than the bed.
ACCURATE GAUGING
The Rigid and accurate construction of the back gauge provided with the machine allows consistency in the width of sheets being cut.
UPPER BEAM
Ram is also of solid steel plates, carrying the upper knife. Its minimum weight ensure lesser load on the bearings, The upper beam moves in flat heat treated steel guide plates to avoid plates to avoid deflection, for smooth running and maintain the accurate straightness of the upper knife.
LUBRICATION
Single shot lubricator provides oil to all the lubrication points, when necessary. Thus, all bearing parts and guide surface etc.
HOLD-DOWN MECHANISM
Solid clamping by powerful spring loads hold down is one of the reasons for accuracy in our shears. Heavy uniform pressure is applied along the full length of the work piece, preventing slippage regardless of versions in thickness. Hold down pressure in easily adjustable for clamping soft material. Different thickness of material can be cut without future adjustment with consistently accurate and burr free results.
DRIVE
Drive through V-belts on flywheel and reduction gears are made of steel, hob cut for the smooth running and longer life.
ROLLING KEY CLUTCH
Made of alloy steel for positive engagement and continuous operation having three key ways. Single rolling key system is incorporated in the machine ensuring easy and efficient working of the machine.
Compare Capacity & Cutting Details Before You Decide
Technical Specifications of Mechanical Under Crank Shearing Machine
| MODEL NO. | RUS-1 | RUS-2 | RUS-3 | RUS-4 | RUS-5 | RUS-6 | RUS-7 | RUS-8 | RUS-9 | RUS-10 |
| Machine Size | 1270 X 2 | 1525 X 2 | 2030X2 | 2540 X 2 | 3125 X 2 | 1270 X 4 | 1525 X 4 | 2030 X 4 | 2540 X 4 | 3125 X 4 |
| Cutting Cap. Thick of M.S. | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 |
| Standard Front Gauge | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 |
| Standard Rear Gauge | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 750 | 750 | 750 |
| Table Height | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 |
| Table Width | 425 | 425 | 425 | 425 | 425 | 450 | 450 | 450 | 450 | 450 |
| Blade Length | 1270 | 1525 | 2030 | 2540 | 3125 | 1270 | 1525 | 2030 | 2540 | 3125 |
| Blade Width | 50 | 50 | 50 | 50 | 50 | 63 | 63 | 63 | 75 | 75 |
| Blade Thickness | 12 | 12 | 12 | 12 | 12 | 18 | 18 | 18 | 18 | 18 |
| Stroke Per Minute | 60 | 60 | 60 | 50 | 50 | 60 | 60 | 50 | 50 | 50 |
| Machine Length | 2150 | 2450 | 2900 | 3450 | 4150 | 2300 | 2500 | 3000 | 3500 | 4200 |
| Machine Width | 1450 | 1450 | 1450 | 1450 | 1525 | 1525 | 1525 | 1700 | 1700 | 1850 |
| Machine Height | 1275 | 1275 | 1375 | 1375 | 1400 | 1320 | 1320 | 1425 | 1425 | 1500 |
| Main Motor HP | 2 | 3 | 5 | 5 | 7.5 | 5 | 5 | 7.5 | 7.5 | 10 |
| Weight Approx. | 1400 | 1650 | 2100 | 3100 | 3500 | 1950 | 2300 | 3000 | 4200 | 5000 |
Higher Output. Stable Operation. Reliable Results.
Key Advantages of Mechanical Under Crank Shearing
Mechanical Under Crank Shearing machines are designed with a rigid frame, balanced drive mechanism, and precise blade movement to support smooth cutting performance, consistent accuracy, and dependable operation during daily sheet metal processing tasks.
Powerful and Accurate Cutting
The under-crank mechanism delivers strong shearing force with consistent blade travel for straight and precise cuts. This ensures clean edges and minimal material deformation on every operation.
High Productivity
Fast and reliable shearing action enhances workflow and reduces processing time. Ideal for fabrication shops and production units with continuous cutting needs.
Smooth Mechanical Operation
Engineered for efficient motion and consistent force transmission across the cutting stroke. Reduces vibration and enhances cutting performance in continuous usage.
Versatile Material Capability
Suitable for cutting mild steel, stainless steel, aluminium, and various sheet metals. Delivers consistent performance across diverse metal types and thicknesses.
Adjustable Blade Clearance
Blade gap can be adjusted easily based on material thickness for optimal cutting quality. Improves cutting precision and extends blade life.
User-Friendly Operation
Simple mechanical drive system allows easy operation with minimal training. Enhances operator comfort and overall workshop efficiency.
Standard Features & Optional Upgrades
Configured to Match Your Production Requirements
Rajesh Mechanical Under Crank Shearing Machines are developed precisely to meet the demanding requirements of modern metal fabrication and industrial production. Built with a robust frame, precision under-crank mechanism, and optimized blade setup, these machines provide excellent stability, dependable cutting performance, and smooth operation.
Each machine is thoughtfully designed to ensure steady performance, enhanced safety features, and long-lasting endurance — making it a reliable solution for workshops and manufacturing units focused on quality output and high productivity.
Standard Equipment
- Variable Rake Angle Adjustment by HMI (Display)
- Hydraulic Hold-Downs
- Rapid Blade Clearance Adjustment
- Cutting Length Timer
- Front Operator Control Box
- Movable Foot Switch
- Front Gauge
- Four Edge Interchangeable Shear Blade
- Operation and Maintenance Manual Book
Optional Equipment
- Multi Step DDC Back Gauge
- NC Servo Back Gauge
- Cutting Sheet Collector
- Pneumatic Sheet Support
From Light-Duty to Heavy-Duty Applications
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Why Choose Rajesh Mechanical Under Crank Shearing Machines
Rajesh Mechanical Under Crank Shearing Machines deliver dependable performance for straight, accurate sheet cutting across a wide range of metal fabrication tasks. The under-crank mechanism provides balanced force transmission, stable blade movement, and proper alignment, allowing smooth operation and reliable results for workshops, fabrication units, and production facilities.
Each machine is manufactured using high-grade steel and carefully machined components to maintain structural strength, stability, and long service life. The solid construction helps minimize vibration, supports precise cutting accuracy, and keeps maintenance needs low even during continuous industrial use.
Rajesh Power Press Mechanical Under Crank Shearing Machines can be tailored to suit your production requirements with suitable cutting capacities, stroke settings, control options, and safety features. Supported by prompt service assistance and genuine spare parts, these machines help maintain operational continuity, workplace safety, and consistent output over the long term.
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People Also Ask
Frequently Asked Questions
This machine is designed to cut a variety of sheet metals such as mild steel, stainless steel, aluminum, copper, and brass. The cutting capacity depends on the specific model’s blade length and thickness rating, so you should choose a model that matches the material type and thickness you intend to shear.
The machine uses an under‑crank mechanism driven by an electric motor and flywheel. The crankshaft converts rotational motion into powerful vertical movement of the upper blade, which shears the material against a fixed lower blade. The flywheel stores and releases energy for each cut, allowing for efficient shearing cycles.
Standard features typically include a hold‑down system to securely clamp the sheet during cutting and back and front gauges for accurate positioning and consistent cut lengths. Adjustable blade clearance and robust frame construction also help ensure clean, precise cuts while minimizing material slippage.
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