V-Belts are widely used in industrial power transmission systems to transfer power between pulleys. Different V-belt sections are designed for different drive requirements, so choosing the correct profile is important for reliable machinery operation.
The most commonly encountered industrial V-belt sections include A, B, C, SPZ, SPA, SPB and SPC. The correct selection depends on the pulley groove, transmitted power, speed, application and machine design.
What You’ll Learn 1. What Is a V-Belt Profile?
SPB vs SPZ V-Belts — Quick Comparison
| eature | SPB V-Belt | SPZ V-Belt |
|---|---|---|
| Top Width | 17 mm | 10 mm |
| Height | 13 mm | 8 mm |
| Angle | 40° | 40° |
| Power Range | Medium to high | Low to medium |
| Typical Applications | Heavy industrial machinery, crushers, compressors | Compact drives, HVAC, light industrial |
| Pulley Diameter | Larger pulleys | Smaller pulleys |
2. A Section V-Belts 3. B Section V-Belts 4. C Section V-Belts 5. SPZ V-Belts 6. SPA V-Belts 7. SPB V-Belts 8. SPC V-Belts 9. How to Choose the Correct V-Belt Profile 10. Common V-Belt Applications 11. Need Help Choosing a V-Belt?
What Is a V-Belt Profile?
A V-belt profile refers to the cross-sectional shape and dimensions of the belt. The profile must match the corresponding pulley groove. A belt with the wrong profile may not sit correctly in the pulley and can lead to slipping, wear, noise or reduced power transmission.
| Profile | Top Width | Height | Angle | Common Applications |
|---|---|---|---|---|
| A / 13 | 13 mm | 8 mm | 40° | Light industrial, HVAC |
| B / 17 | 17 mm | 11 mm | 40° | General industrial |
| C / 22 | 22 mm | 14 mm | 40° | Heavy machinery |
| SPZ | 10 mm | 8 mm | 40° | Compact drives |
| SPA | 13 mm | 10 mm | 40° | General industrial |
| SPB | 17 mm | 13 mm | 40° | Heavy industrial |
| SPC | 22 mm | 18 mm | 40° | High-power drives |
A Section V-Belts
A-section V-belts are commonly used in general machinery and smaller industrial drives. They are suitable for a wide range of standard power transmission applications.
B Section V-Belts
B-section V-belts are widely used in industrial machinery where higher power transmission is required compared with smaller classical sections.
C Section V-Belts
C-section V-belts have a larger cross-section and are commonly used for higher-power industrial drives and demanding machinery applications.
SPZ V-Belts
SPZ is a narrow V-belt profile commonly used in compact industrial drive systems. The narrow construction can provide efficient power transmission where space is limited.
SPZ V-Belt Sizes and Dimensions
SPZ V-belts are narrow wedge belts with a 10 mm top width and 8 mm height. They are designed for compact drives where space is limited.
Common SPZ sizes:
| Length (mm) | Length (inches) | Common Applications |
|---|---|---|
| 630 | 24.8 | Small motors |
| 710 | 28.0 | HVAC fans |
| 800 | 31.5 | Pumps |
| 900 | 35.4 | Compressors |
| 1000 | 39.4 | Light machinery |
| 1120 | 44.1 | Workshop equipment |
| 1250 | 49.2 | Compact industrial drives |
| 1400 | 55.1 | General machinery |
Need a specific SPZ size? Send us your belt marking or dimensions and we’ll check availability.
SPA V-Belts
SPA V-belts are narrow-profile industrial belts used in various power transmission applications. The correct belt must match the pulley groove and drive requirements.
SPB V-Belts
SPB V-belts are designed for industrial power transmission applications and are commonly used where greater power capacity is required than smaller narrow profiles.
SPB V-Belt Sizes and Dimensions
SPB V-belts are narrow wedge belts with a 17 mm top width and 13 mm height. They are designed for higher power transmission than SPZ and SPA profiles.
Common SPB sizes:
| Length (mm) | Length (inches) | Common Applications |
|---|---|---|
| 1250 | 49.2 | Compact drives |
| 1400 | 55.1 | Pumps, fans |
| 1600 | 63.0 | Compressors |
| 1800 | 70.9 | Conveyors |
| 2000 | 78.7 | Heavy machinery |
| 2240 | 88.2 | Crushers |
| 2500 | 98.4 | Mining equipment |
| 2800 | 110.2 | Large industrial drives |
Need a specific SPB size? Send us your belt marking or dimensions and we’ll check availability.
SPC V-Belts
SPC V-belts are larger narrow-profile belts used for higher-power industrial drives. They are suitable for demanding applications when the pulley and machine specifications require an SPC section.
How to Choose the Correct V-Belt Profile
The correct V-belt profile should be selected based on the existing belt, pulley groove and machinery requirements. Do not select a belt based only on its length.
When identifying a replacement, check:
• Belt profile or section
• Belt length
• Belt width and height
• Existing belt part number
• Pulley dimensions
• Machinery or equipment application
• Required quantity
For a replacement belt, providing the original part number or a clear photograph of the existing belt can make identification easier.
Common V-Belt Applications
V-belts are used in many applications including industrial machinery, HVAC equipment, pumps, fans, compressors, agricultural machinery, workshop equipment, conveyors and other mechanical drive systems.
Frequently Asked Questions
Q: What is the difference between SPB and SPZ V-belts?
A: SPB belts have a 17 mm top width and are designed for higher power transmission. SPZ belts have a 10 mm top width and are used in compact drives. They are not interchangeable — the pulley groove must match the belt profile.
Q: How do I identify an SPB or SPZ V-belt?
A: Check the belt marking — it will usually say “SPB” or “SPZ” along with the length. If the marking is worn, measure the top width: 17 mm = SPB, 10 mm = SPZ.
Q: Can I use an SPB belt on an SPZ pulley?
A: No. The pulley groove must match the belt profile. Using the wrong profile causes slipping, wear, and premature failure.
Q: Do you stock SPB and SPZ V-belts in Dubai?
A: Yes. Popular SPB and SPZ sizes are stocked in our Deira, Dubai warehouse. Non-stock sizes can be sourced on order.
Q: What is the price of SPB and SPZ V-belts in Dubai?
A: Price depends on the profile, length, quantity, and brand. Send us your requirements for a quotation.
Need Help Choosing a V-Belt?
CONTACT Auto Nobel Trading L.L.C. your belt part number, belt size, profile, dimensions, machinery application or a clear photo of the existing belt.
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Need Help Choosing a V-Belt?
Contact Auto Nobel Trading L.L.C. with your belt part number, belt size, profile, dimensions, machinery application or a clear photo of the existing belt.
For industrial V-belts in Dubai, UAE, browse our [V-Belts page](https://autonobel.com/product/v-belts/).
Related articles:
– [SPA vs SPB V-Belts: What’s the Difference?](https://autonobel.com/spa-vs-spb-v-belts/)
– [V-Belt vs Timing Belt: What’s the Difference?](https://autonobel.com/v-belt-vs-timing-belt/)
[Contact Auto Nobel Trading L.L.C.](https://autonobel.com/contact/) for a quotation.