EP-T 5-mm-Aluminium-Zahnriemenscheibe mit gerader Bohrung – Riemenbreite 25 mm

EP-T 5MM Aluminum Straight Bore Timing Pulley — Belt Width 25MM

DIN 7721 Compliant | T5 Metric Pitch | 6F Flanged Type | Aluminum (AL) Material | Best Aluminum Straight Bore Timing Pulley

The EP-T 5MM series is an industry-standard straight bore timing pulley engineered to DIN 7721 specifications. Precision-machined from high-grade aluminum alloy, this metric timing pulley delivers dependable synchronous power transmission across a wide range of industrial and automation applications. With a 5 mm pitch and 25 mm belt width compatibility, it serves as a go-to replacement component or OEM timing pulley choice for engineers, procurement specialists, and systems integrators worldwide.

2. Five Key Product Advantages

3. How a Straight Bore Timing Pulley Works

A timing belt pulley operates on the principle of positive engagement between the machined tooth profile of the pulley and the corresponding tooth geometry of a synchronous timing belt. Unlike friction-based V-belt drives, the interlocking teeth prevent slippage, guaranteeing a constant velocity ratio between driving and driven shafts at all load conditions.

In the EP-T 5MM straight bore timing pulley, the 5 mm pitch teeth are precision-cut into the pulley body to match the T5 belt profile as defined under DIN 7721. The flanged design (Type 6F) guides the belt laterally, preventing axial walk-out during operation — a common challenge in high-speed or vertically oriented timing belt drives. The straight bore accepts standard keyed or keyless shafts, and the hub length of 36 mm provides sufficient engagement for secure set-screw or key locking across the full tooth number range.

Power is transmitted when the belt meshes sequentially with each pulley tooth, distributing the load across multiple teeth simultaneously. This load-sharing characteristic is what enables timing belt drive pulleys to handle significant torque in a compact envelope. The aluminum alloy body reduces rotational inertia, allowing faster acceleration and deceleration cycles — critical performance attributes in servo motion, indexing tables, and pick-and-place automation.

The belt wrap angle, center distance, and tooth count relationship collectively determine drive efficiency. For optimal performance, a minimum of 6 teeth in mesh on the small pulley is recommended. With the EP-T 5MM series offering tooth counts from 10 to 60, engineers can design drives that maintain this mesh condition across a wide ratio range, ensuring quiet, low-vibration operation throughout the service life of the timing pulley and belt assembly.

4. Material & Surface Treatment

This EP-T 5MM metric timing pulley is precision-machined from high-quality aluminum alloy (EN AW-6061 / EN AW-7075 equivalent grades). Aluminum is the preferred material for metric timing belt pulleys in the light-to-medium duty power transmission segment for several well-established engineering reasons.

Its density is roughly one-third that of steel, which translates directly into lower rotational inertia and reduced bearing loads — important considerations for servo motor drives, stepper-driven positioners, and any application where frequent speed changes are involved. The machinability of aluminum also allows for finer tooth profile tolerances than cast iron or mild steel, contributing to the quieter operation and reduced belt wear that characterize well-designed aluminium timing pulley systems.

Standard surface finish is natural anodized or clear anodized, which provides a uniform oxide layer that increases surface hardness, improves corrosion resistance, and reduces the risk of aluminum-belt fretting — a known failure mode in aluminum pulleys running under heavy preload. For corrosive or salt-spray environments (marine, offshore, coastal industrial facilities), hard anodizing to a minimum 25-micron layer thickness is available on request.

Where higher load capacity, elevated temperature resistance, or food-grade compliance is required, stainless steel timing pulley variants are available within our broader product range. However, for the majority of automation, packaging, textile, and conveying applications where this metric timing belt pulley is specified, the aluminum alloy construction provides the optimal balance of performance, weight, and cost efficiency.

5. Application Scenarios

The T5 aluminum straight bore timing pulley is one of the most versatile timing belt drive pulleys in industrial use. Below are the primary sectors where this metric timing pulley sees regular deployment.

6. Regulatory Compliance & International Standards

When sourcing an aluminum straight bore timing pulley for use in machinery or industrial equipment, buyers in regulated markets should be aware of the following applicable standards and regulations:

European Union — Machinery Directive 2006/42/EC: Machinery sold within the EU must comply with the Machinery Directive, which sets essential health and safety requirements for mechanical transmission components. Timing pulleys used in CE-marked machines must meet the torque transmission and fatigue life requirements relevant to their application. The DIN 7721 standard that governs this T5 timing pulley series is harmonized with European practice and recognized under this regulatory framework.

ISO 5294 & ISO 5296: These international standards specify the dimensional requirements for synchronous belt drives. ISO 5294 covers pulleys for trapezoidal-tooth synchronous belts, while ISO 5296 addresses associated belt dimensions. T-pitch timing pulleys — including the T5 series — are designed to conform with the principles established in these standards, ensuring interchangeability with belts and pulleys sourced from any ISO-compliant global supplier.

United States — ANSI/RMA IP-24: The Rubber Manufacturers Association standard IP-24 governs synchronous belt drives in North America. While the T5 metric pitch is primarily a DIN/ISO European standard, it is widely used in US automation applications, and the components align with the engineering principles defined in ANSI/RMA guidelines. Buyers integrating this metric timing belt pulley replacement into ANSI-governed equipment should verify dimensional compatibility at the design stage.

Japan — JIS B 1856: Japan Industrial Standard JIS B 1856 defines dimensions for synchronous belt pulleys in the Japanese market. The T-pitch series is used in Japanese automation markets, and dimensional compatibility should be confirmed when sourcing metric timing pulleys for Japanese OEM equipment.

RoHS Compliance: The aluminum alloy used in these timing pulleys is fully compliant with EU Directive 2011/65/EU (RoHS 2) restricting hazardous substances. No lead, cadmium, hexavalent chromium, or regulated flame retardants are present in the base material or surface treatment. This is a mandatory requirement for mechanical components incorporated into electrical and electronic equipment sold within EU member states and increasingly required by procurement policies in Australia, South Korea, and Canada.

7. About Us

We are a professional timing belt pulley manufacturer with deep roots in mechanical power transmission components. Our production facility specializes in the design and manufacture of aluminum timing pulleys, metric pitch timing pulleys, custom timing pulleys, and related synchronous drive components for industrial customers across six continents. With dedicated CNC machining centers, precision gear hobbing equipment, and rigorous dimensional inspection processes, we maintain consistent product quality across high-volume production runs.

Our engineering team supports customers from component selection through to application validation, offering technical guidance on timing pulley standard sizes, belt selection, center distance calculation, and drive system optimization. Whether you need timing pulley stock from our standard range, or a custom aluminum timing pulley with non-standard bore, modified hub, or special tooth profile, our manufacturing capability covers it.

8. Related Products — One-Stop Timing Drive Supply

We supply the complete timing drive system, not just individual pulleys. Below are two complementary product families that pair directly with our T5 aluminum timing pulley range — enabling you to source your entire belt drive assembly from a single, qualified supplier.

Standard-Zahnstangen mit metrischer Teilung

For linear drive applications, our Metric Pitch Standard Toothed Bars function as rack equivalents in belt-driven linear motion systems. Paired with the T5 aluminum timing pulley, they deliver precise, backlash-minimal linear positioning across the full travel length. Ideal for gantry systems, conveyor indexers, and belt-driven linear actuators where a continuous toothed belt run is not practical. System compatibility is guaranteed when paired with our T5 timing pulley and belt series.

V-Pulley (V-Belt Pulley)

For applications requiring higher torque transmission or belt drives where slippage is acceptable under overload conditions, our V-Pulley range complements the timing pulley product line. V-belt pulleys are widely used in industrial fan drives, pump drives, compressor systems, and agricultural equipment where cost-effective power transmission at moderate speeds is the primary design criterion. Combining our timing belt drive pulleys for precision positioning stages with V-Belt pulleys on ancillary drives is a common machine design approach. View our full V-Pulley product range for specifications and availability.

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