Mechanical Steel Jack Hand Crank Steel Rack Jack
Buy heavy duty Mechanical Steel Jacks. Dual lifting points (toe and head), hand crank drive, 300mm stroke, and capacities from 5T to 20T. Request factory direct quotes!
Description
Product Overview
The Mechanical Steel Jack (known across global construction and railway maintenance as the Hand Crank Steel Rack Jack, and specified across Latin American industrial sites as Gato mecanico de cremallera) is a heavy-duty manual lifting tool engineered for lifting, supporting, and positioning heavy loads in locations without hydraulic or electric power.
Built with a high-strength steel rack, forged alloy gears, and a dual-purpose lifting frame, this jack allows operators to lift loads using either the top head or the bottom toe position. Featuring a low clearance toe setup, a self-locking crank handle, and rugged steel housing, this portable manual mechanical jack 5t to 20t range provides high stability and long service life for heavy equipment maintenance, structural alignment, and railway track servicing.
Advanced Mechanical Engineering & Innovations
Heavy structural lifting demands solid load retention, versatile clearance access, and high mechanical drive efficiency:
Dual Lifting Configuration (Head & Toe): Offers dual lifting points to handle different ground clearance heights. The bottom toe enables lifting extremely low loads, while the top head handles standard vertical support tasks.
Precision Machined Gear Drive System: High-tensile heat-treated gears and rack teeth reduce hand crank force while maintaining uniform load progression during raising and lowering cycles.
Folding Safety Crank Handle: Equipped with an ergonomic hand crank mechanism featuring a internal brake or ratchet mechanism to prevent accidental slipping or kickback under load.
Stable Structural Base Plate: Features a wide, heavy-gauge steel base plate that distributes heavy vertical loads evenly across ground surfaces to prevent tipping or sinking.
Technical Specifications & Parameter Matrix
Certified mechanical performance parameters, lifting height ranges, stroke distances, and shipping dimensions for the complete heavy duty hand crank mechanical jack lineup:
| Model | Rated Capacity | Test Load | Hand Power at Full Load | Distance (Stroke) | Lifting Height | Net Weight | Dimensions (Meas.) |
| SY-C5.0 | 5.0 t | 61.3 kN | 280 N | 300 mm | 25 – 725 mm | 29.5 kg | 75 * 21 * 25 cm |
| SY-C10 | 10.0 t | 122.5 kN | 560 N | 300 mm | 30 – 800 mm | 50.0 kg | 82 * 27 * 31 cm |
| SY-C16 | 16.0 t | 196.0 kN | 640 N | 300 mm | 40 – 800 mm | 69.0 kg | 85 * 29 * 35 cm |
| SY-C20 | 20.0 t | 245.0 kN | 640 N | 300 mm | 40 – 860 mm | 80.0 kg | 90 * 38 * 30 cm |
B2B Procurement Note: Models SY-C5.0 through SY-C20 maintain a uniform $300\text{ mm}$ stroke distance across all capacities, with minimum toe clearance starting as low as $25\text{ mm}$ on the 5-ton unit and $40\text{ mm}$ on the 20-ton unit.
Critical Capacity Management & Safe Rigging Dynamics
Maintenance teams deploying the railway structural steel rack jack models should evaluate load distribution and clearance parameters:
Dual Toe Head Lifting Capacity:
Top Head Lifting: Handles 100% of the rated load capacity (5.0 t on SY-C5.0 up to 20.0 t on SY-C20).
Bottom Toe Lifting: Specially engineered to carry heavy loads at low initial clearance heights (25 mm to 40 mm starting heights).
Proof Load Safety Testing: Each unit undergoes strict factory test load verifications (up to 245 kN on the 20-ton model) to ensure frame rigidity and rack gear resistance against mechanical fatigue.
Industrial Applications
Railway Track Installation & Maintenance: Track crews use the Gato mecanico de cremallera to lift steel rails and concrete ties during ballast tamping and track alignment.
Heavy Machinery Installation & Rigging: Industrial riggers deploy the dual toe head lifting steel jack to lift heavy machine bases off factory floors for skate insertion.
Bridge Maintenance & Structural Alignment: Bridge builders use the Hand Crank Steel Rack Jack to raise heavy structural beams, concrete forms, and support columns.
Mining & Heavy Construction Sites: Field operators utilize the Mechanical Steel Jack in remote outdoor sites where hydraulic oil leaks must be avoided or power sources are unavailable.
