Fine-Pitch Lead Screw

Product Specifications

Technical details and manufacturing context for Fine-Pitch Lead Screw

Definition

A fine-pitch lead screw is a precision mechanical component used to convert rotational motion into linear motion with high resolution and accuracy. It is a critical part of micro-adjustment mechanisms, where its fine thread pitch enables minute linear displacements per revolution, allowing for extremely precise positioning. This makes it essential in applications requiring high precision and minimal backlash, such as in laboratory equipment, optical instruments, semiconductor manufacturing, and precision machining. The screw is typically paired with a nut, and when the screw rotates, the nut moves linearly along the screw's axis. The fine pitch reduces linear travel per revolution, enabling fine control. In automated systems, it is often driven by a stepper or servo motor. The product is available in various materials, including stainless steel, alloy steel, and bronze for nuts. Key parameters include nominal diameter (6–60 mm), lead (0.5–10 mm), length (100–3000 mm), accuracy grade (C3–C7 per ISO 3408-3), lead accuracy (±0.005–±0.05 mm/300mm), maximum linear speed (0.5–2 m/s), maximum dynamic load (5–50 kN), operating temperature (-20–80 °C), material grades (C45–40CrMo4 per DIN EN 10083), surface hardness (58–62 HRC), thread direction (RH/LH), and weight (0.5–50 kg/m). These values are reference ranges and must be confirmed for the specific model and application. The product is designed and manufactured according to relevant standards, but compliance must be verified with the supplier. Always consult the manufacturer for model-specific specifications and application suitability.

Working Principle

The fine-pitch lead screw operates on the principle of converting rotational motion into linear motion. When the screw rotates, the engaged nut moves linearly along the screw's axis. The fine thread pitch reduces the linear travel per revolution, allowing for highly precise positioning control. This is typically driven by a stepper or servo motor in automated systems, enabling controlled and repeatable movements. The accuracy of the linear motion depends on the thread pitch accuracy and the mechanical stiffness of the assembly.

Common Materials

Stainless Steel, Alloy Steel, Bronze (for nuts)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	6–60 mm	Common range for fine-pitch lead screwsISO 68-1
Lead	0.5–10 mm	Fine pitch for high resolutionISO 68-1
Length	100–3000 mm	Custom lengths available
Accuracy Grade	C3–C7	C3 for high precision, C7 for general useISO 3408-3
Lead Accuracy	±0.005–±0.05 mm/300mm	Tighter tolerance for higher gradeISO 3408-3
Max. Linear Speed	0.5–2 m/s	Depends on lubrication and load
Max. Dynamic Load	5–50 kN	Based on screw diameter and leadISO 3408-5
Operating Temperature	-20–80 °C	Beyond range may affect lubrication
Material	C45–40CrMo4	Alloy steel for higher strengthDIN EN 10083
Surface Hardness	58–62 HRC	Induction hardened for wear resistanceISO 18265
Thread Direction	RH/LH	Right-hand standard, left-hand on request
Weight	0.5–50 kg/m	Depends on diameter and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Screw Shaft Part
Primary threaded component that rotates to create linear motion

Material: Stainless Steel or Alloy Steel
Nut Part
Engages with screw threads to convert rotational motion to linear movement

Material: Bronze or Polymer Composite
Support Bearings Part
Provide axial and radial support to minimize deflection and vibration

Material: Steel with Ceramic or Polymer Balls

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Micro-Adjustment Mechanism

View system integration details

Manufacturers of Fine-Pitch Lead Screw

Manufacturer profiles associated with Fine-Pitch Lead Screw.

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Frequently Asked Questions

What is the typical lead range for fine-pitch lead screws?

The lead (linear travel per revolution) typically ranges from 0.5 mm to 10 mm, as listed in the product parameters. This fine pitch enables high resolution in positioning. However, the exact lead must be selected based on the application requirements and confirmed with the manufacturer.

What materials are commonly used for fine-pitch lead screws?

Common materials include stainless steel and alloy steel for the screw, and bronze for the nut. Alloy steel grades such as C45 to 40CrMo4 are used for higher strength. The material choice affects load capacity, corrosion resistance, and wear characteristics. Always verify material suitability with the supplier.

What accuracy grades are available for fine-pitch lead screws?

Accuracy grades range from C3 (high precision) to C7 (general use), according to ISO 3408-3. The lead accuracy varies from ±0.005 mm/300mm for higher grades to ±0.05 mm/300mm for lower grades. The required grade depends on the application's precision needs.

How should I verify the specifications of a fine-pitch lead screw?

You should consult the manufacturer or supplier to confirm model-specific values for parameters such as nominal diameter, lead, length, accuracy grade, load capacity, and operating temperature. Also, verify compliance with relevant standards like ISO 68-1 and ISO 3408-3. The values provided in the directory are reference ranges and must be confirmed for your specific application.

Data Basis

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pressure:	Axial load capacity: 100N to 20kN depending on diameter and material
other spec:	Lead accuracy: ±0.005mm per 300mm travel, max linear speed: 1.5m/s, backlash: <0.01mm
temperature:	-40°C to 120°C (standard materials), up to 250°C with high-temp alloys

Product Specifications

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