Naming Conventions for Mechanical Synchronous Pulleys – Examples and Comparisons

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Naming Conventions for Mechanical Synchronous Pulleys – Examples and Comparisons

Mechanical synchronous pulleys are typically named according to international standards (such as ISO, RMA, DIN) or manufacturer-specific conventions. Different standards and brands may use varying naming schemes. Below are common naming methods with comparative examples.

1. By Tooth Profile Standard

(1) Metric Trapezoidal Tooth (ISO 5296)

Naming Rule: Model + Tooth Count + Additional Features
- Model: T2.5, T5, T10 (number indicates pitch in mm)
- Examples:
  - T5-30: Trapezoidal tooth, 5mm pitch, 30 teeth.
  - T10-50-F: Trapezoidal tooth, 10mm pitch, 50 teeth, with flange (F).

(2) Curvilinear Tooth (HTD/STS/GT, etc.)

HTD (High Torque Drive):
- Naming Rule: HTD + Pitch + Tooth Count
- Example: HTD 8M-40 (8mm pitch, 40 teeth).
GT (Gates GT Series):
- Example: GT3-24 (3mm pitch, 24 teeth).

(3) Imperial Curvilinear Tooth (MXL/XL/L/H/XH, etc.)

Imperial Standard (common in low-power transmissions):
- MXL (finest), XL, L, H, XH (from fine to coarse).
- Example: L-075 (L-type tooth, 75 teeth).

2. By Pulley Structure

(1) Simple Type (No Flange)

Example: S3M-18 (S = simple, 3M tooth profile, 18 teeth).

(2) Flanged Type (Anti-Dislodgment)

Example: T5-25-F (F = flange).

(3) Double-Sided Pulley (Two Sets of Teeth)

Example: XL-50D (D = double-sided, 50 teeth).

3. Manufacturer-Specific Naming

(1) Gates

Example: 555-8M-30 (555 series, 8mm pitch, 30 teeth).

(2) Mitsumi

Example: MTS3MR-20 (MTS series, 3M tooth profile, R = material, 20 teeth).

4. Comparison Examples

Standard/Brand	Example Model	Interpretation
ISO Trapezoidal	T10-40-F	Trapezoidal tooth, 10mm pitch, 40 teeth, with flange.
HTD Curvilinear	HTD 5M-25	HTD profile, 5mm pitch, 25 teeth.
Gates GT	GT2-16	GT2 profile, 2mm pitch, 16 teeth.
Imperial XL	XL-100	XL profile, 100 teeth (pitch = 5.08mm).
Double-Sided	L-60D	L profile, 60 teeth, double-sided.

Key Differences

Pitch Unit: Metric (mm) vs. Imperial (inch).
Tooth Profile ID: Trapezoidal (T), Curvilinear (HTD/GT), Imperial (XL/L/H).
Additional Features: Flange (F), Double-sided (D), Material (e.g., R = nylon).

For accurate identification, always refer to equipment manuals or supplier specifications, as compatibility depends on tooth profile parameters (pitch, tooth height, etc.).