Product Introduction

TYD-LS Series Lock Nut Hydraulic Jacks are single-acting hydraulic lifting tools equipped with mechanical self-locking lock nuts. After lifting loads into place, the nut can be tightened to bear weight mechanically, so the cylinder can sustain heavy loads safely for a long time even without hydraulic pressure, ideal for equipment maintenance and static load support work. Built-in overflow holes limit the maximum stroke to prevent plunger separation from the barrel. Small & medium tonnage models retract automatically via heavy-duty return springs, while models of 250 tons and above adopt load return design. Fabricated from high-strength alloy steel with heat treatment and precision CNC machining, combined with anti-corrosion coating, imported seals and dust-proof rings for outstanding durability. All units are fitted with NPT 3/8” male connectors and dust caps; heat-treated anti-slip grooves on the plunger eliminate the need for a saddle seat. Compatible with all manual and electric hydraulic pump stations, widely used in equipment overhaul, bridge support, heavy component positioning and more.

Feature

• Mechanical self-locking lock nut design: tighten the nut after lifting loads, the cylinder can hold weight steadily for long periods without hydraulic oil supply for enhanced safety.

• Overflow hole stroke limiting structure restricts maximum extension travel, preventing the plunger from slipping out of the cylinder barrel and avoiding equipment failure.

• Single acting return system: spring return for standard tonnage models; load return for cylinders rated 250 tons and above.

• Anti-corrosion surface finish with glossy appearance, resisting rust and corrosion under long-term indoor and outdoor working conditions.

• Constructed of high-strength alloy steel with premium heat treatment, precisely processed by imported CNC lathes, drilling and grinding machines for high rigidity and stable pressure bearing performance.

• Imported sealing components reduce friction loss, enabling long continuous operation with low risks of abrasion and hydraulic oil leakage.

• Dust-proof sealing ring blocks dust and debris inside the cylinder, lowers internal contamination and greatly extends service life.

• Every model is equipped with NPT 3/8” male high-pressure connector and matching dust cap to protect thread fittings from dirt and impact damage.

• Heat-treated anti-slip grooves on the plunger head provide strong friction during lifting, no saddle accessory required.

Technical Parameter