Focusing Thread: Length 10mm to 50mm, Surface Finish Ra ≤ 0.8μm

Component Specifications

Definition

A precision-engineered threaded component integrated into focusing lens mounts that enables controlled axial movement of optical elements to achieve precise focal adjustment. It converts rotational motion into linear displacement with micron-level accuracy, ensuring optimal image clarity and beam convergence in laser systems, microscopes, cameras, and other optical devices.

Working Principle

Utilizes helical thread geometry (typically fine-pitch metric or unified threads) to transform rotational torque into precise linear motion. As the focusing thread rotates within its mating component, it advances or retracts the lens assembly along the optical axis, changing the distance between optical elements to adjust focus. Thread pitch determines the sensitivity of adjustment per revolution.

Materials

Stainless steel (AISI 303/304/316 for corrosion resistance), aluminum alloy (6061-T6 for lightweight applications), or brass (C36000 for smooth threading). Surface treatments may include passivation, anodizing, or nickel plating for wear resistance and reduced friction.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	10mm to 50mm
Tolerance	ISO 965-1 Medium class or DIN 13-28 6g/6H
Thread Type	Metric (M6x0.5, M8x0.75) or Unified (UNC/UNF)
Thread Pitch	0.5mm to 1.25mm (fine pitch)
Load Capacity	50N to 200N axial load
Surface Finish	Ra ≤ 0.8μm

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

Standards

ISO 965, DIN 13, ISO 2768-m

Parent Products

This component is used in the following industrial products

Focusing Lens Mount

A mechanical interface that securely holds and positions a lens within a focusing mechanism.

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Engineering Analysis

Risks & Mitigation

Thread wear leading to backlash
Contamination affecting smooth movement
Corrosion in harsh environments
Cross-threading during assembly
Thermal expansion mismatch

FMEA Triads

Trigger: Insufficient lubrication
Failure: Increased friction and uneven movement
Mitigation: Implement scheduled maintenance with compatible lubricants

Trigger: Particulate contamination
Failure: Thread binding and damage
Mitigation: Use cleanroom assembly and protective covers

Trigger: Over-torquing during adjustment
Failure: Thread deformation or stripping
Mitigation: Install torque-limiting tools and provide operator training

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01mm linear positioning accuracy, ±0.005mm thread pitch deviation

Test Method

Coordinate measuring machine (CMM) verification, optical comparator measurement, functional testing with laser interferometry

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Focusing Thread

Manufacturer profiles associated with Focusing Thread.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a focusing thread?

To provide precise linear displacement of optical elements for accurate focal adjustment through controlled rotational movement.

How do I select the appropriate thread pitch?

Choose finer pitch (0.5mm) for sensitive adjustments in microscopy, coarser pitch (1.25mm) for rapid focusing in camera systems based on required sensitivity vs. speed trade-off.

What maintenance do focusing threads require?

Periodic cleaning with isopropyl alcohol, lubrication with dry-film or minimal grease (for optical cleanliness), and inspection for thread wear or contamination.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Focusing Thread