Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width
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Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm WidthDouble Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width

Double Sided Toothed Timing Belt – DL Series, Black Closed Loop, 20mm & 25mm Width

HomeDIYer
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By HomeDIYer®

Price:
$33.59 USD
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In stock (500 units), ready to be shipped

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Description

 

Double Sided Toothed Timing Belt – DL Series Closed Loop for Precision Drive Systems

When your drive system requires power transmission from both sides of the belt simultaneously — think counter-rotating shafts, serpentine conveyor layouts, or dual-axis CNC gantries — a standard single-sided belt simply won't cut it. Engineers, machine builders, and serious DIYers who need reliable synchronous motion on both the inner and outer belt surfaces turn to double sided toothed timing belts for a reason: they eliminate slippage, maintain exact pitch, and handle complex routing that single-sided designs can't.

Each belt in this DL series is a closed-loop synchronous drive belt constructed from black rubber (typically neoprene compound) with internal cord reinforcement for dimensional stability. The double-sided tooth profile follows the standard DL pitch of 9.525mm (3/8"), allowing engagement with DL-compatible pulleys on both faces. Belt width options are 20mm (≈0.79") and 25mm (≈0.98"), and model numbers span from 187DL through 817DL — covering pitch circumferences from approximately 18.7" (≈475mm) up to 81.7" (≈2075mm). Select your model number based on the required belt loop circumference for your drive geometry.

These closed loop timing belts are well suited for CNC routing machines requiring dual-drive belt paths, industrial conveyor systems with back-side drive rollers, robotics and automation platforms with serpentine belt routing, and light-to-medium duty power transmission applications in workshops and manufacturing cells where synchronous motion accuracy is critical.

🔗 Compatibility Note: DL series belts use a 9.525mm (3/8") pitch. Verify your pulley tooth profile and face width match the DL standard and your selected belt width (20mm or 25mm) before ordering.

✅ Key Features of These Double Sided DL Timing Belts

  • ⚙️Dual-Face Tooth Profile — Teeth on both the inner and outer surfaces allow simultaneous engagement with pulleys on either side, enabling serpentine and counter-rotating drive configurations that single-sided closed loop timing belts cannot achieve.
  • 📐Standard DL Pitch (9.525mm / 3/8") — Conforms to the widely adopted imperial DL timing belt standard, ensuring broad compatibility with off-the-shelf DL pulleys and sprockets used in CNC machines, conveyors, and industrial automation equipment.
  • 🖤Black Rubber Construction with Cord Reinforcement — The neoprene-compound body resists oil and grease exposure common in workshop environments, while internal cord reinforcement (typically fiberglass or steel) keeps the belt dimensionally stable under load and minimizes elongation over time.
  • 📏Wide Model Range — 187DL to 817DL — Over 40 model sizes covering belt circumferences from approximately 18.7" (≈475mm) to 81.7" (≈2075mm), so you can find the exact closed loop length your drive geometry requires without custom fabrication.
  • ↔️Two Width Options: 20mm and 25mm — Choose 20mm (≈0.79") for compact drive systems with narrower pulley faces, or 25mm (≈0.98") for applications requiring higher lateral stability and greater power transmission capacity on the same DL pitch.
  • 🔄Closed Loop — No Splicing Required — Factory-formed as a continuous loop, these synchronous drive belts eliminate the weak points and alignment issues associated with cut-to-length or laced belt alternatives, delivering consistent tooth engagement from the first revolution.

📐 Technical Specifications — DL Series Double Sided Timing Belt

Belt Type Double Sided Closed Loop Synchronous Timing Belt
Series DL (Imperial Double-Sided)
Pitch 9.525mm (3/8")
Belt Color Black
Width Options 20mm (≈0.79") / 25mm (≈0.98")
Model Range 187DL – 817DL (see variant options)
Pitch Circumference Approx. 18.7" (≈475mm) to 81.7" (≈2075mm) depending on model
Body Material Rubber compound (typically neoprene); contact us to confirm exact compound
Reinforcement Internal cord (typically fiberglass or steel); contact us to confirm
Tooth Profile Double-sided trapezoidal, DL standard
Loop Type Closed loop (endless)
Compatible Pulleys Standard DL-series pulleys and sprockets
Typical Applications CNC machines, conveyors, robotics, industrial automation
Working Tension See variant options / contact us to confirm for your application
⚠️ Sizing Tip: The DL model number represents the belt's pitch length in tenths of an inch (e.g., 300DL = 30.0" pitch circumference ≈ 762mm). Always measure your required loop circumference before selecting a model.

❓ Frequently Asked Questions

How do I choose the right DL belt model number and length?

The model number indicates the belt's pitch length in tenths of an inch — so a 187DL is typically 18.7" (≈475mm) in circumference, and a 300DL is 30.0" (≈762mm). To select the correct model: measure your center-to-center shaft distance, add the effective circumferences of both pulleys, and match the total to the closest available DL model. When between sizes, generally size up to avoid over-tensioning the belt and accelerating wear.

What is the load capacity of these double sided timing belts?

Load capacity varies by belt width and model length. Generally, the 25mm width variants carry higher tensile loads than the 20mm variants of the same model number. For precise working tension ratings specific to your drive speed and torque requirements, refer to your drive system's engineering specifications or contact us to confirm suitability before ordering.

Are these timing belts suitable for outdoor or wet environments?

These belts are typically constructed from neoprene or rubber compounds that generally provide good resistance to oil, grease, and moderate moisture — common conditions in workshop and light industrial settings. Prolonged UV exposure or full water immersion is not recommended. For harsh outdoor or washdown environments, contact us to confirm the specific material compound before use.

What pulley or sprocket standard do DL series belts use?

DL series belts follow the imperial double-sided timing belt standard with a 9.525mm (3/8") pitch and a trapezoidal tooth profile. They are compatible with standard DL-series pulleys and sprockets available from most industrial drive component suppliers. Always verify that your pulley's tooth profile, pitch, and face width match the DL specification and your selected belt width before ordering.

What is the difference between the 20mm and 25mm belt width options?

The 25mm width generally offers higher power transmission capacity and greater lateral stability on the pulley face, making it better suited for heavier loads or applications where belt tracking is critical. The 20mm width is typically used in more compact drive systems where pulley face width or space constraints limit the belt width. Choose based on your pulley face width specification and the torque demands of your application.

Can these belts be used in CNC machines, robotics, or conveyor systems?

Yes — double sided DL timing belts are commonly used in CNC routing machines, automated conveyor drives, robotics platforms, and industrial motion control systems where both sides of the belt need to engage pulleys or drive surfaces simultaneously. This makes them particularly useful for serpentine belt paths and counter-rotating shaft arrangements. Confirm the model length and belt width match your machine's specifications before ordering.

Do these belts stretch over time, and how do I maintain proper tension?

Timing belts with fiberglass or steel cord reinforcement typically exhibit minimal elongation under normal operating loads compared to V-belts or flat belts. Periodically inspect belt tension and tooth engagement — if skipping or slippage occurs, adjust the center distance of your pulleys rather than forcing the belt. Avoid over-tensioning, which can accelerate cord fatigue and bearing wear on your drive shafts.

🛒 Select your model and belt width above, then add to cart — ships from our US warehouse.

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