Tooth Ring: Inner Diameter 20-180 mm, Outer Diameter 30-200 mm

Component Specifications

Definition

A tooth ring is a critical annular gear component manufactured through polypropylene injection molding processes, designed to transmit torque and rotational motion within gear assemblies. It features precisely engineered teeth profiles that mesh with mating gears to achieve specific speed ratios and power transmission requirements in mechanical systems.

Working Principle

Operates on gear meshing principles where the tooth ring's precisely molded teeth engage with corresponding teeth on mating gears to transfer rotational motion and torque. The polypropylene material provides self-lubricating properties, reducing friction and wear during operation while maintaining dimensional stability under load.

Materials

Polypropylene (PP) homopolymer or copolymer, typically with 20-40% glass fiber reinforcement for enhanced mechanical properties. Material specifications include: PP-GF30 (30% glass fiber), density: 1.12-1.23 g/cm³, melt flow index: 10-30 g/10min (230°C/2.16kg), tensile strength: 60-100 MPa, flexural modulus: 3000-5000 MPa.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Module	0.5-2.0 mm
Backlash	0.05-0.15 mm
Face Width	5-25 mm
Maximum RPM	1500-3000
Tooth Profile	Involute
Inner Diameter	20-180 mm
Outer Diameter	30-200 mm
Pressure Angle	20°
Surface Finish	Ra 1.6-3.2 μm
Number Of Teeth	24-120
Operating Temperature	-20°C to 100°C

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 1328-1:2013, ISO 6336-1:2019, DIN 3960, DIN 3961, DIN 3962

Parent Products

This component is used in the following industrial products

Polypropylene Injection Molded Gear Wheel

Precision plastic gear component manufactured via injection molding for mechanical power transmission.

View Product Details

Engineering Analysis

Risks & Mitigation

Tooth wear under excessive load
Thermal deformation at high temperatures
Chemical degradation from certain solvents
Fatigue failure from cyclic loading
Dimensional instability from moisture absorption

FMEA Triads

Trigger: Excessive torque or shock loading
Failure: Tooth fracture or deformation
Mitigation: Implement torque limiters, use glass-reinforced PP grades, design with adequate safety factors

Trigger: Improper gear meshing alignment
Failure: Accelerated wear and noise generation
Mitigation: Precision mounting fixtures, alignment verification during assembly, use of alignment pins

Trigger: Exposure to incompatible chemicals
Failure: Material degradation and loss of mechanical properties
Mitigation: Material compatibility testing, protective coatings, environmental controls

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO IT7-IT9 for critical dimensions, ±0.05mm for tooth profile, ±0.1mm for diameters

Test Method

Coordinate measuring machine (CMM) inspection, gear profile testing per ISO 1328, material testing per ISO 527 and ISO 178, dimensional verification with optical comparators

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 Tooth Ring

Manufacturer profiles associated with Tooth Ring.

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Frequently Asked Questions

What are the advantages of polypropylene tooth rings over metal gears?

Polypropylene tooth rings offer self-lubrication, corrosion resistance, noise reduction, lighter weight, and lower manufacturing costs compared to metal gears, making them ideal for moderate-load applications.

What maintenance is required for polypropylene tooth rings?

Minimal maintenance is required due to polypropylene's self-lubricating properties. Periodic inspection for wear, cleaning to remove debris, and ensuring proper alignment with mating gears are recommended.

Can polypropylene tooth rings be used in high-temperature applications?

Standard polypropylene tooth rings are suitable for temperatures up to 100°C. For higher temperatures (up to 150°C), heat-stabilized or glass-reinforced grades should be used.

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.

Tooth Ring