Solid 45# steel construction: lead screw, nut, and base are made from durable 45# steel for long service life and dependable performance in repeated or heavyduty use. Multiple length options: choose the lead screw set in 220mm, 250mm, 280mm, 300mm, or 350mm to match your project requirements and mounting space. Smooth, accurate hand operation: includes a foldable aluminumalloy handwheel (100mm or 125mm) that delivers smooth, controllable motion for precise manual adjustments and easy handling when space is limited. Simple, robust design: straightforward mechanical structure with strong solid force and large bearing capacity provides stable linear motion and reliable load support without complex assembly. Practical compatibility: designed to integrate with jigs, fixtures, manual linear stages, or small actuator systems where a compact, reliable lead screw drive is needed. Why customers need it and how it solves problems Replaces worn or weak manual linear drives with a stronger, longerlasting 45# steel solution that reduces maintenance and downtime. Offers selectable lengths and handwheel sizes so you can match travel and control to specific projects without custom machining. The foldable handwheel saves space and improves accessibility while still giving precise manual control for setup, testing, or fine adjustments. Key attributes at a glance Material: 45# steel (lead screw, nut, base) Length options: 220mm, 250mm, 280mm, 300mm, 350mm Handwheel: foldable aluminum alloy, 100mm or 125mm Function: manual linear motion control, bearing capacity, stable structure Typical applications Workshop jigs and fixtures: precise height or position adjustment for clamping, drilling, or assembly stations. Small machinery and hobby CNC: manual feed or fineadjustment stages for prototyping and tasks. Lab and test equipment: reliable, repeatable linear positioning for sensors, sample holders, or test rigs. What sets this lead screw set apart Durable 45# steel components built for repeated use and higher loads. Multiple size choices and a foldable handwheel for flexible installation in tight or variable spaces. Straightforward, heavyduty design that prioritizes stability, load capacity, and ease of operation.