Elliptical Cam: Load Capacity 50-5000 N, Major Axis 20-200 mm

Component Specifications

Definition

An elliptical cam is a specialized cam mechanism with an elliptical cross-section that rotates about its geometric center, creating a precisely controlled reciprocating motion in the follower. Unlike circular cams, elliptical cams produce variable velocity profiles throughout the rotation cycle, making them ideal for applications requiring specific motion characteristics in wave generators and other precision machinery.

Working Principle

The elliptical cam operates on the principle of converting uniform rotary input into controlled non-uniform output motion. As the cam rotates, the varying radius of the elliptical profile causes the follower to move in a predetermined path, creating specific displacement, velocity, and acceleration characteristics. The motion profile is mathematically defined by the ellipse's major and minor axes dimensions and the follower configuration.

Materials

Typically manufactured from high-strength alloy steels (AISI 4140, 4340), stainless steels (17-4PH, 316), or tool steels (D2, M2) with surface hardening treatments (carburizing, nitriding, induction hardening) to achieve surface hardness of 58-62 HRC and core toughness. Advanced applications may use engineered polymers (PEEK, UHMW-PE) or composites for specific requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Major Axis	20-200 mm
Minor Axis	15-180 mm
Maximum RPM	500-3000
Eccentricity	0.1-0.5
Load Capacity	50-5000 N
Surface Finish	Ra 0.4-1.6 μm
Angular Tolerance	±0.1°
Dimensional Tolerance	±0.01 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 1101, DIN 7182, ISO 286, DIN 7172

Parent Products

This component is used in the following industrial products

Wave Generator

The elliptical component that creates the flexible deformation in the flexspline of a harmonic drive gear system.

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Engineering Analysis

Risks & Mitigation

Wear and surface degradation over time
Fatigue failure under cyclic loading
Misalignment causing abnormal wear patterns
Lubrication failure leading to increased friction
Dimensional inaccuracies affecting motion precision

FMEA Triads

Trigger: Insufficient surface hardness or improper heat treatment
Failure: Premature wear and surface pitting
Mitigation: Implement proper material selection with adequate hardness (58-62 HRC surface), apply appropriate surface treatments, and conduct regular hardness testing

Trigger: Improper alignment during installation
Failure: Asymmetric wear and reduced component life
Mitigation: Use precision alignment tools during installation, implement laser alignment procedures, and conduct periodic alignment checks

Trigger: Inadequate lubrication or contamination
Failure: Increased friction, overheating, and accelerated wear
Mitigation: Establish proper lubrication schedules, use recommended lubricants, implement contamination control measures, and monitor lubricant condition

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101: Form tolerance 0.005 mm, Position tolerance 0.01 mm, Surface profile tolerance 0.008 mm

Test Method

Coordinate Measuring Machine (CMM) verification, surface roughness testing per ISO 4287, hardness testing per ISO 6508, dynamic testing with motion analysis systems

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

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Manufacturers of Elliptical Cam

Manufacturer profiles associated with Elliptical Cam.

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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 main advantage of using an elliptical cam over a circular cam?

Elliptical cams provide variable velocity profiles throughout the rotation cycle, allowing for precise control of acceleration and deceleration phases, which is essential for applications requiring specific motion characteristics in wave generators and other precision equipment.

How do I calculate the motion profile of an elliptical cam?

The motion profile is determined by the ellipse equation parameters and follower geometry. Displacement = a × (1 - e²) / (1 + e × cosθ) where a is semi-major axis, e is eccentricity, and θ is rotation angle. Velocity and acceleration are derived from the first and second derivatives respectively.

What maintenance is required for elliptical cams?

Regular lubrication with appropriate grease or oil, periodic inspection for wear patterns, checking for surface pitting or scoring, and verification of dimensional tolerances during scheduled maintenance intervals.

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.

Elliptical Cam