Alignment Bushings: Length Range 10-100 mm

Component Specifications

Definition

Alignment bushings are precision-engineered cylindrical components installed in die holders or adapter plates to guide and align mating components such as punches, dies, or other tooling elements. They provide exact positional accuracy, reduce lateral forces, prevent misalignment during high-speed operations, and ensure consistent part quality in metal stamping, forming, and assembly processes. These bushings typically feature hardened surfaces and tight tolerances to withstand repetitive loading and maintain dimensional stability.

Working Principle

Alignment bushings operate on the principle of interference fit and precision guidance. They are press-fitted into precisely machined bores in the die holder/adapter plate, creating a rigid mounting point. When mating components (like punches or guide pins) engage with the bushing's inner diameter, the hardened surface provides a low-friction guide path, ensuring axial alignment and preventing radial movement. This minimizes deflection, reduces wear on critical tooling, and maintains consistent tool-to-workpiece positioning throughout the production cycle.

Materials

Case-hardened alloy steel (e.g., AISI 8620, 4140), through-hardened tool steel (e.g., D2, A2), or carbide for extreme wear applications. Surface hardness typically 58-62 HRC, core toughness 28-35 HRC. Optional coatings: TiN, TiCN, or DLC for enhanced lubricity and corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length Range	10-100 mm
Concentricity	≤0.005 mm TIR
Load Capacity	Static: 500 MPa, Dynamic: 300 MPa
Surface Finish	Ra 0.4 μm max
Inner Diameter Tolerance	H7 (+0.000 to +0.025 mm)
Outer Diameter Tolerance	h6 (-0.000 to -0.013 mm)

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 286-2, DIN 1494, JIS B 0401

Parent Products

This component is used in the following industrial products

Die Holder/Adapter Plate

A structural component in a die set that securely holds the die and provides mounting interface to the press.

View Product Details

Engineering Analysis

Risks & Mitigation

Wear and dimensional degradation over time
Improper installation causing bore damage
Misalignment due to contamination or debris
Fatigue failure under cyclic loading
Corrosion in humid environments

FMEA Triads

Trigger: Abrasive wear from particulate contamination
Failure: Increased clearance leading to tool misalignment and part defects
Mitigation: Implement regular cleaning protocols, use sealed or self-lubricating bushings, and apply protective coatings

Trigger: Overloading beyond dynamic capacity
Failure: Plastic deformation or cracking of bushing, causing catastrophic tool failure
Mitigation: Design with adequate safety factors, monitor operational loads, and use bushings with higher load ratings

Trigger: Improper press-fit installation
Failure: Bore distortion or bushing slippage, resulting in loss of alignment accuracy
Mitigation: Follow precise installation procedures (e.g., controlled press force, use of installation tools), verify bore dimensions before assembly

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101, dimensional tolerances per ISO 286-2

Test Method

CMM measurement for dimensions, surface roughness tester for finish, hardness testing per ISO 6508, concentricity verification with dial indicators or laser alignment

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 Alignment Bushings

Manufacturer profiles associated with Alignment Bushings.

Sourcing Alignment Bushings from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Mounting Interface

Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Frequently Asked Questions

What is the primary function of alignment bushings in a die holder?

Alignment bushings provide precise guidance and positioning for punches, dies, or other tooling elements, ensuring accurate alignment, reducing lateral forces, and preventing misalignment during high-speed stamping or forming operations.

How do I select the right material for alignment bushings?

Select based on application load, speed, and wear requirements. Use case-hardened alloy steel for general stamping, through-hardened tool steel for high-wear applications, and carbide for extreme abrasion or high-temperature environments.

What maintenance is required for alignment bushings?

Regular inspection for wear, scoring, or deformation; lubrication per manufacturer guidelines (if not self-lubricating); and replacement when tolerances exceed specified limits to prevent tool damage or part defects.

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.

Alignment Bushings