| Idler Diameter (mm) | Common Length Specifications (mm) |
|---|---|
| φ76 | 200, 240, 315, 375, 455 |
| φ89 | 200, 240, 315, 375, 455, 525, 600 |
| φ108 | 200, 240, 315, 375, 455, 465, 525, 600, 750, 950 |
| φ127 | 315, 375, 455, 525, 600, 750, 950 |
| φ133 | 315, 375, 455, 525, 600, 750, 950, 1150 |
| φ159 | 375, 455, 525, 600, 750, 950, 1150, 1400 |
Common Conveyor Idler Specifications
Conveyor idlers are typically classified by diameter, length, shaft diameter, bearing type, and idler type. Below are the most commonly used specifications in international trade:
1. Common Idler Diameters
(Unit: mm)
- 63
- 76
- 89
- 102
- 108 (most commonly used)
- 114
- 127
- 133
- 140
- 152
- 159 (heavy-duty)
- 165
- 178
- 194
- 219 (extra heavy-duty)
2. Common Idler Lengths
(Unit: mm, matched with belt width)
Typical range:
- 200 / 240 / 250
- 315 / 350 / 375
- 400 / 450 / 455
- 500 / 525 / 550
- 600 / 650
- 700 / 750
- 800 / 900 / 950
- 1000 / 1150
- 1200 / 1400 / 1600
👉 Actual length is usually customized according to belt width
(e.g., B = 500 / 650 / 800 / 1000 / 1200 / 1400 mm)
3. Common Shaft Diameters
- φ20 mm
- φ25 mm
- φ30 mm
- φ35 mm
- φ40 mm
4. Common Bearing Types
- 6203 (light duty)
- 6204 (standard)
- 6205 (most common)
- 6206 (heavy duty)
- 6305 / 6306 (heavy load)
5. Idler Types
1. Trough Idler
- Trough angle: 20° / 30° / 35° / 45°
2. Flat Idler
- Used for return side
3. Impact Idler
- With rubber rings for shock absorption
4. Self-aligning Idler
- Used to prevent belt misalignment
5. Tapered Idler
- Used for belt tracking
6. Standard Model Expression (in trade)
Customers usually specify like this:
- Idler: Ø108 × 455 mm, shaft 25 mm, bearing 6205
- Idler: Ø159 × 750 mm, heavy duty
- Trough idler set for 800 mm belt
7. Most Common Combinations
- Ø89 × 315 / 455
- Ø108 × 455 / 600 / 750
- Ø133 × 465 / 600 / 750
- Ø159 × 750 / 950 / 1150
