Answering buyers seeking reliable 170XL timing belts, this guide highlights options ideal for small CNC machines, 3D printers, and hobbyist drive systems. Top picks focus on durable rubber belts with fiberglass cords and trapezoidal tooth profiles to minimize slippage and improve power transmission. Best fits include users needing clean, lube-free operation, and setups where a precise, constant motion is essential. The overview below points out who each product is best for and why it stands out, plus practical cautions to consider.
Product Comparison Table
- Uxcell 170XL 037 Timing Belt — 85 teeth, 0.20″ pitch, 0.37″ wide; robust for general purpose motion transfer.
- BESTORQ 170-XL-037 Timing Belt Pack — 85 teeth, trapezoidal profile, durable for precision drives.
- BESTORQ 170-XL-037 Belt Pack (3-Pack) — cost-effective for bulk replacements and consistent performance.
- uxcell 340XL 037 Timing Belt — 170 teeth, 0.37″ wide; suitable for longer span setups with higher power needs.
- BESTORQ 170-XL-025 Timing Belt — 85 teeth, 0.25″ width; alternative size for compact drives.
Overview of Selected 170XL Timing Belts
| Product | Key Benefit |
|---|---|
| Uxcell 170XL 037 Timing Belt | Balanced width and pitch for reliable engagement. |
| BESTORQ 170-XL-037 Timing Belt | High-quality trapezoidal tooth design for precise meshing. |
| BESTORQ 170-XL-037 Pack | Multiple belts for easy replacements and maintenance. |
| uxcell 340XL 037 Timing Belt | Double-teeth count for longer travel with strong power transmission. |
| BESTORQ 170-XL-025 Timing Belt | Smaller width option for compact installations. |
Uxcell 170XL 037 Timing Belt

Size: 170XL timing belt with 0.37″ width and 0.20″ pitch, featuring 85 teeth in a trapezoidal profile. Material combines durable rubber with embedded fiberglass cords for strength, flexibility, and wear resistance. Tooth profile supports accurate, efficient motion transfer and reduces slippage. Best for general-purpose drive systems where consistent timing is essential. Caution: ensure pulley compatibility with trapezoidal teeth to avoid misalignment.
BESTORQ 170-XL-037 Timing Belt

85 Teeth, 0.2″ pitch, 0.37″ width with trapezoidal tooth profile. Designed as a trouble-free alternative to chain drives, recognized for durable construction and reliable power transmission. This belt is suitable for precision drives where clean operation and reduced maintenance are priorities. Best for users needing dependable, long-lasting components in relatively hot or high-load environments. Limitation: may require exact pulley matching for optimal performance.
BESTORQ 170-XL-037 Pack of 3

Three-pack of trapezoidal timing belts, each with 85 teeth, 0.2″ pitch, and 0.37″ width. Engineered for wear resistance with a woven nylon-based fabric backing and chloroprene polymer core for stable performance. Ideal for users who replace belts regularly or run multiple machines with similar drive specifications. Choose this if you want to minimize downtime and stock spare belts. Caution: ensure your setup supports a 0.37″ wide belt across all pulleys.
uxcell 340XL 037 Timing Belt

Size: 340XL timing belt with 0.37″ width, 34″ outer circumference, and 170 teeth. Features a fiberglass-cord reinforced rubber belt and trapezoidal tooth profile for accurate motion transfer and reduced slippage in longer span applications. Best for larger or extended-drive configurations that still require precise timing. Limitation: longer belt length may demand larger pulleys and careful alignment to avoid belt whip at high speeds.
Qjaiune 2Pcs 150XL 037 Timing Belt

Note: This option is 150XL, not 170XL, but included for context in similar belt families. It features 75 teeth, 0.19″ pitch, 0.38″ width, and a neoprene body with nylon tooth surface. Best for compact drives that require low-noise operation and resistance to dust, grease, oil, and moisture. Avoid using this when a true 170XL specification is required, as belt size compatibility is critical for performance.
BESTORQ 170-XL-037 Trapezoidal Timing Belt

85 Teeth, 0.2″ pitch, 0.37″ width, trapezoidal tooth profile. Marketed as a reliable, economical alternative to chain drives with nylon-based fabric backing for smooth running. Suitable for precision motion needs where belt integrity and consistent speed are essential. Caution: confirm match with pulleys and drive geometry to ensure optimal timing accuracy.
BESTORQ 170-XL-037 Pack of 10

Pack of ten trapezoidal timing belts with 85 teeth, 0.2″ pitch, and 0.37″ width. Engineered for wear resistance with fabric facing and high-temperature polymer throughout. This pack is suitable for bulk installations or regular replacement cycles in busy setups. Better for shops or labs needing multiple belts on hand. Limitation: bulk packs require sufficient storage space and accurate belt alignment on multiple machines.
Buying Guide: Key Considerations For 170XL Timing Belts
- Drive compatibility: Ensure belt width, pitch, and tooth profile match your pulleys and drive system to avoid slippage or misalignment.
- Material and construction: Look for reinforced rubber with fiberglass cords for strength and wear resistance; nylon-based fabric backing improves stability during operation.
- Tooth profile: Trapezoidal teeth deliver better engagement with pulleys for precise timing; avoid if your pulley uses a different tooth geometry.
- Length and circumference: Confirm the belt length and outside circumference fit your machine’s layout; longer belts may require larger pulleys and precise alignment.
- Maintenance profile: Some belts are lube-free and designed for cleaner operation; consider your environment (dust, oil, moisture) when selecting.
- Cost efficiency: Multi-packs offer lower per-belt cost and reduced downtime, but verify storage readiness and compatibility across machines.
- Temperature tolerance: High-temperature polymers help maintain performance in warm drive environments; select belts rated for your expected operating temperatures.
FAQ
- What is 170XL timing belt? The 170XL designation refers to a timing belt with a 0.20″ pitch and 0.37″ width, typically used in small CNC machines and 3D printers.
- Which belt is best for a precise 3D printer drive? Belts with a trapezoidal tooth profile, good wear resistance, and a stable nylon or fabric backing are preferred for precise repeatable motion.
- Should I buy a pack or single belts? If you operate multiple machines or want ready replacements, a pack offers cost and downtime benefits; otherwise, a single belt may suffice.
- Will a 0.37″ wide belt fit all pulleys? Not always. Confirm pulley groove width and belt width compatibility to avoid binding or slippage.
- Are belt materials important for longevity? Yes. Reinforced rubber with fiberglass cords and proper backing materials extend belt life under load and reduce stretching.
- What is the advantage of a trapezoidal tooth profile? It improves engagement with pulleys, reduces backlash, and minimizes the risk of timing errors during operation.