Lead Screw

Your Professional Lead Screw Supplier!

Zhejiang Zhongji Changsheng E-commerce Co., Ltd. was established in 2020 and mainly operates a bearing trading platform. The company now covers a full range of bearing and pneumatic component products, with a total of 1.5 million SKUs and a year-round spot inventory value of approximately RMB 20 billion. In 2023, the company's self operated automotive parts business was fully launched, mainly for chassis components such as automotive bearings, ball heads, swing arms, and stabilizer bars, and simultaneously launched a series of pneumatic component products.

IKO Lead Screw
IKO lead screws are precision-engineered, machine-made components that are used to convert rotational motion into linear motion.
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THK Lead Screw
A THK leadscrew is a type of linear motion system that is primarily used for accurate positioning and smooth linear motion.
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INA Lead Screw
INA leadscrews are a type of mechanical motion transfer device commonly used in linear motion systems.
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ROLLWAY Lead Screw
Rollway leadscrew is a type of leadscrew that is manufactured by Rollway Bearing Corporation.
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NSK Lead Screw
NSK leadscrew is a device used in linear motion applications to convert rotary motion into linear motion.
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SCHNEEBERGER Lead Screw
SCHNEEBERGER leadscrew is a high-precision linear motion component that is widely used in various equipment and machinery.
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HIWIN Lead Screw
HIWIN leadscrews are high-precision linear actuators used in various industrial and automation applications for precise positioning and motion control.
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Why Choose Us

Wide Range of Brands Covered

NSK, SKF, NTN, FAG, INA, KOYO, EZO, NMB, IKO, THK, TIMKNE, NACHI, MCGILL, ELGES, FYH, ASAHI, IJK, EAST, ROLLWAY, SAMICK, HRB, ZWZ, LYC, TR, BUT, ZHBR, YFA, HZY, QCS, and other well-known domestic and foreign brands. The bearing models of major brands are complete, and customers can purchase them in a one-stop manner.

Sufficient supply

The company now covers a full range of bearing and pneumatic components products, with a total of 1.5 million SKUs and a year-round spot inventory value of approximately RMB 20 billion.

High-quality service

We promise to provide genuine guarantee, stable supply, and a complete logistics system to ensure efficient procurement for customers.

Wide range of applications

The products are widely used in many industries such as engineering machinery, machine tools, automobiles, metallurgy, mining, petroleum, electricity and railways.

Our Best-Selling Lead Screw

IKO Lead Screw
IKO lead screws are precision-engineered, machine-made components that are used to convert rotational motion into linear motion.

HIWIN Lead Screw
HIWIN leadscrews are high-precision linear actuators used in various industrial and automation applications for precise positioning and motion control.

SCHNEEBERGER Lead Screw
SCHNEEBERGER leadscrew is a high-precision linear motion component that is widely used in various equipment and machinery.

Lead Screw Specification

Lead Screw Diameter	1/4"	1/2"
Maximum Available Travel	8"	20"
Standard Leads	.025", .050", .100", .200", 1 mm, 2 mm	.025", .040", .050", .100", .125", .200", .400", 1 mm, 1.25 mm, 2 mm, 2.5 mm, 5 mm
Maximum No-Load Torque	4 oz in	8 oz in
Maximum Load (Including Inertial)	30 lb	50 lb
Working Load (Including Inertial)	8 lb	10 lb
Stiffness of Nut	4 lb / .0001"	5 lb / .0001"

Advantages of Lead Screw

High load-carrying capacity

Compact

Easy to design into a system

Minimal number of parts

Smooth operation

Quiet

Require little maintenance

Lead Screw Components

Screw shaft

The screw shaft is a cylindrical rod with threads or grooves along its length. At times, it may be referred to as an ACME rod, buttress rod or square-threaded rod as per the thread geometry. The most common materials used for lead screw shafts are carbon steel, stainless steel and aluminum.

Threads

The threads are present on the screw shaft and the nut. Although it is not a separate component in itself, the thread's structure is responsible for converting rotational motion into linear motion. The external threads are in direct contact and mesh with the nut's internal threads.

Nut

The nut is a fairly simple component but does not offer much use by itself. Typically, it will have some means, such as tapped or through holes, to connect it to supporting components like a clamp. The clamp connects the nut to a guide rail, restricting the nut's rotation and only allowing linear motion. Nuts can be made from plastic or bronze to add self-lubricating properties.

The Basic Principle Of Lead Screw

A lead screw works in one of two ways:

The shaft is stationary and the power is supplied to the nut
The shaft rotates and transfers power to the nut

In the first case, manually applied force or a motor rotates the nut. This pushes the nut along the shaft's axis. Ultimately, the torque applied to the nut is transformed into linear motion.
In the second case, the nut's rotational motion is restricted and the screw shaft rotates. The nut moves along the screw axis in the process. Thus, the torque on the screw shaft converts into linear motion of the nut.

Lead Screw Threads Types

Square thread
The square thread has square-shaped threads whose flanks are perpendicular to the axis of the lead screw. This 0° thread angle prevents any radial pressure on components and reduces friction between them. This design also minimises the contact surface between the nut and the screw.

Acme thread
The acme thread is a trapezoid-shaped thread with a thread angle of 29°. It is based on the imperial standard but is accepted throughout the world. Due to the sharp 90° angle between the flank and the root, square threads are relatively weak at the base. Widening the base adds strength as well as makes it easier to machine.

Buttress thread
The buttress thread is a triangular-shaped thread that is used when force needs to be transmitted in one direction only. It has a 7° inclination on the load flank and a 45° inclination on the trailing flank. Such a steep inclination enables it to carry the load as efficiently as square threads, while the trailing flank adds additional strength thanks to the wider base.

Ordering Process

Consultation and demand analysis

Product selection and confirmation

Order placement and order review

Shipping and logistics tracking

Packaging and Shipping

Packaging	Plastic bag, wooden box
Transportation methods	Road transport, rail transport, sea transport, air transport

FAQ

Q: What are the advantages of lead screws?

A: Lead screws also offer many other advantages such as more flexible configuration and form factor, the ability to operate without lubricant, quieter operation, clean materials and lower cost.

Q: What is a lead screw used for?

A: A lead screw is sometimes referred to as a “power screw” or a “translation screw”. They are used within motion control devices to transform rotary or turning movements into linear movements

Q: What is a lead screw?

A: Lead screw is a power transmission linkage used in modern machines. It can generate very high forces with a small moment, thus providing a large mechanical advantage. It can be thought of as a wedge wrapped around a cylindrical rod.

Q: How to spec a lead screw?

A: In order to size a lead screw system it is important to know what torque will be required to drive the load. This can be calculated simply once the efficiency if the lead screw is known. The more travel per revolution, the higher the required torque but the efficiency also increases, up to a point.

Q: What are the properties of lead screws?

A: Large load carrying capacity.
Smooth and quiet operation.
Highly accurate and precise linear motion.
Self-Locking capability (in vertical applications)

We're well-known as one of the leading lead screw manufacturers and suppliers in China. Be free to wholesale high quality lead screw in stock here and get quotation from our factory. Contact us for more details.

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