Overview and comparison
What are T profile timing pulleys?
T profile timing pulleys are metric synchronous pulleys with a trapezoidal tooth form — T5 (pitch 5 mm) and T10 (pitch 10 mm). Unlike HTD (rounded tooth), the T profile has a steeper trapezoidal tooth, suited to precision positioning drives at low to medium loads. Widely used in automation, office machines and light industry.
Made from aluminium UNI 9006-T6 with pilot bore, supplied pre-bored and machined to shaft diameter at installation.
T profile vs. HTD comparison
| Criterion | T profile (T5/T10) | HTD profile (5M/8M/14M) |
|---|---|---|
| Tooth form | Trapezoidal | Rounded (parabolic) |
| Pitch | Metric (5 / 10 mm) | Metric (5 / 8 / 14 mm) |
| Bending stress | Higher | Lower |
| Torque capacity | Lower | Higher |
| Typical use | Precision positioning drives | Industrial high-torque drives |
| Material | Aluminium | Aluminium / Steel / Cast iron |
Technical data
Technical data — T5 series, width 27 mm
Pitch: 5 mm · Width F = 21 mm · L = 27 mm · Aluminium · 10–60 teeth
| Code | Type | Teeth | de (mm) | Df (mm) | Dm (mm) | F (mm) | L (mm) | d (mm) | Flange № | Kg |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 T 5 | 2F | 10 | 15.05 | 19.5 | 8 | 21 | 27 | — | 200 | 0.02 |
| 12 T 5 | 2F | 12 | 18.25 | 23 | 10 | 21 | 27 | — | 201 | 0.02 |
| 14 T 5 | 2F | 14 | 21.45 | 25 | 13 | 21 | 27 | — | 203 | 0.03 |
| 16 T 5 | 2F | 16 | 24.60 | 32 | 18 | 21 | 27 | — | 205 | 0.04 |
| 18 T 5 | 2F | 18 | 27.80 | 32 | 20 | 21 | 27 | — | 205 | 0.04 |
| 20 T 5 | 2F | 20 | 31.00 | 36 | 23 | 21 | 27 | — | 206 | 0.06 |
| 22 T 5 | 2F | 22 | 34.25 | 38 | 24 | 21 | 27 | — | 207 | 0.06 |
| 24 T 5 | 2F | 24 | 37.40 | 42 | 26 | 21 | 27 | — | 208 | 0.08 |
| 27 T 5 | 2F | 27 | 42.20 | 48 | 30 | 21 | 27 | 8 | 210 | 0.09 |
| 30 T 5 | 2F | 30 | 46.95 | 51 | 34 | 21 | 27 | 8 | 211 | 0.10 |
| 36 T 5 | 2F | 36 | 56.45 | 63 | 38 | 21 | 27 | 8 | 215 | 0.16 |
| 40 T 5 | 2F | 40 | 62.85 | 66 | 40 | 21 | 27 | 8 | 216 | 0.19 |
| 44 T 5 | 2 | 44 | 69.20 | — | 45 | 21 | 27 | 8 | — | 0.23 |
| 48 T 5 | 2 | 48 | 75.55 | — | 50 | 21 | 27 | 8 | — | 0.28 |
| 60 T 5 | 2 | 60 | 94.65 | — | 65 | 21 | 27 | 8 | — | 0.43 |
Note: dp = de + 2 × correction (de given in the catalogue). Formula dp = (z × 5) / π. Ratio i = z2/z1.
T profile timing pulleys
Download PDF ↓Frequently Asked Questions
What is the difference between T5 and T10?
T5: pitch 5 mm — smaller pulleys, lower torque, precision drives. T10: pitch 10 mm — larger dp at same tooth count, higher torque, more load-resistant.
Can T profile pulleys be used with HTD belts?
No — T5 belts are NOT compatible with HTD 5M belts despite identical metric pitch. Tooth profiles differ. Mixing profiles causes damage.
How is dp calculated?
dp = (z × p) / π. T5, 20 teeth: dp = (20×5)/π = 31.83 mm. T10, 20 teeth: dp = (20×10)/π = 63.66 mm.
Can the pulleys be bored to a specific diameter?
Yes — supplied with a pilot bore, machined to the required size. nibora@nibora.com, +359 64 681 058.