L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)
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L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)

L-Type Timing Belt – 25mm Wide, Black Rubber, 9.525mm Pitch (86L–1200L)

HomeDIYer
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By HomeDIYer®

Price:
$11.00 USD
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In stock (500 units), ready to be shipped

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Description

 

L-Type Timing Belt 25mm Wide — Reliable Synchronous Drive at 9.525mm Pitch

When a slipping V-belt or a worn synchronous belt causes your CNC axis to lose position, your conveyor to drift, or your servo drive to skip teeth under load, the cost is measured in scrapped parts and unplanned downtime. Engineers, machine builders, and maintenance technicians who need a dependable L-type timing belt with a 25mm working width and the standard 9.525mm (3/8") pitch will find a direct replacement or upgrade here — available in 171 model sizes from 86L through 1200L.

Each belt is a closed-loop synchronous drive belt constructed from black rubber with a fiberglass or polyester tensile cord layer and molded trapezoidal teeth. The 25mm (≈0.984") width is fixed across all models; pitch line lengths range from 219.08mm (≈8.63") for the 86L up to 3048mm (≈120") for the 1200L, with tooth counts spanning 23 to 320 teeth. The L tooth profile conforms to the ANSI/RMA IP-24 standard with a 9.525mm pitch.

Typical applications include CNC router X/Y axes requiring a 25mm wide L-belt replacement, industrial conveyor synchronous drive systems, servo motor timing belt drives in packaging machinery, and light-to-medium power transmission on woodworking or metalworking equipment where precise tooth engagement and repeatable positioning are required.

ℹ️ Compatibility: Fits any L-series (9.525mm pitch) timing pulley or sprocket rated for 25mm belt width. Conforms to ANSI/RMA IP-24 standard. Verify your pulley groove width before ordering.

✅ Key Features of These L-Type Timing Belts

  • ⚙️Standard L-Profile Tooth Geometry — 9.525mm (3/8") pitch trapezoidal teeth conform to ANSI/RMA IP-24, ensuring drop-in compatibility with any L-series timing pulley without modification.
  • 📏171 Stocked Length Options — Models 86L through 1200L cover pitch line lengths from 219.08mm (≈8.6") to 3048mm (≈120"), so you can find an exact match for your drive geometry rather than settling for a close approximation.
  • 🔩25mm Fixed Working Width — The consistent 25mm (≈0.984") width delivers a defined load-carrying cross-section across all models, simplifying pulley selection and flange clearance calculations.
  • 🛡️Black Rubber Construction with Tensile Cord — The rubber body resists moderate oil splash and humidity; the internal tensile cord layer limits elongation under cyclic load, maintaining tooth pitch accuracy over service life.
  • 🔄Zero-Slip Synchronous Drive — Positive tooth engagement eliminates the speed variation and slip associated with friction-drive belts, making these L-type synchronous belts suitable for positioning axes and timed conveyor applications.
  • 🚚US Warehouse Stock — All 171 models are stocked domestically, supporting fast replacement for production lines where extended lead times on synchronous drive belts are not acceptable.

📐 Technical Specifications — L-Type Synchronous Timing Belt

Belt Profile L (Large) — Trapezoidal tooth
Pitch 9.525mm (3/8")
Width 25mm (≈0.984")
Model Range 86L – 1200L
Pitch Line Length Range 219.08mm (≈8.63") – 3048mm (≈120")
Tooth Count Range 23 teeth (86L) – 320 teeth (1200L)
Tooth Profile Standard ANSI/RMA IP-24
Belt Material Black rubber (neoprene-style) with tensile cord reinforcement
Color Black
Drive Type Synchronous (positive engagement)
Quantity per Order 1 belt per variant selected
Operating Temperature See variant options / Contact us to confirm
Max Rated Power See variant options / Contact us to confirm
⚠️ Sizing Note: The model number (e.g., 120L) equals the pitch line length in tenths of an inch. Always match by pitch line length — not by measuring the belt's outer surface. If you are unsure of your required model, contact us with your center distance and sprocket tooth counts.

❓ Frequently Asked Questions

How do I choose the right L-type timing belt length for my application?

The model number (e.g., 120L) represents the pitch line length in tenths of an inch. Multiply the model number by 0.1 to get the pitch line length in inches — for example, 120L = 12.0 inches (≈304.8mm). Measure your center distance and sprocket sizes, then use the standard belt length formula or consult your machine's service manual to confirm the correct model. When in doubt, contact us with your drive geometry and we can help you identify the right size.

What does the pitch line length mean, and how does it differ from the outer circumference?

The pitch line length is the theoretical circumference measured at the neutral axis of the belt — the line that does not stretch or compress during bending. It is typically slightly shorter than the outer circumference. Always match belts by pitch line length, not by measuring the outside of the belt, to ensure correct fit on your pulleys.

What load or torque can an L-type timing belt handle?

L-type (9.525mm pitch) timing belts are generally rated for light-to-medium duty power transmission. Actual load capacity depends on belt width, number of teeth in mesh, operating speed, and the specific tensile cord construction. For this 25mm-wide belt, consult your drive designer's load tables or contact us to confirm suitability for your torque requirements. In most cases, L-series belts are suitable for servo and stepper motor drives in the 0.5–5 kW range at moderate speeds.

Can this timing belt be used outdoors or in wet environments?

The belt is constructed from black neoprene-style rubber, which generally offers moderate resistance to oil splash, moisture, and mild chemicals. It is typically suitable for indoor industrial environments and light outdoor exposure. For continuous outdoor use, high-humidity wash-down environments, or aggressive chemical exposure, verify compatibility with your specific conditions before installation. Contact us to confirm if you have a demanding environment.

What sprocket or pulley standard is compatible with this belt?

This belt uses the L (Large) tooth profile with a 9.525mm (3/8") pitch, conforming to the ANSI/RMA IP-24 standard. It is compatible with any L-series timing pulley or sprocket of the same pitch. Ensure the pulley groove width accommodates a 25mm-wide belt — pulleys rated for 1" (25.4mm) wide L-belts are generally compatible; confirm flange clearance with your specific pulley supplier.

How do I decide between different L-type belt models when multiple lengths seem close?

Always select the belt that matches your calculated pitch line length exactly. If your calculation falls between two models, adjust your center distance to accommodate the nearest standard length rather than stretching or compressing a belt. Using the wrong length typically causes premature wear, tooth skipping, or belt failure. Most drive designs include an adjustable tensioner or slotted motor mount for this reason.

Is this belt compatible with CNC routers, 3D printers, or laser cutters?

L-type timing belts are generally used in heavier-duty motion control applications such as CNC routers, industrial conveyors, and servo-driven axes. Most desktop 3D printers use the smaller GT2 (2mm pitch) or T5 profile rather than the L profile. Laser cutters vary — some larger CO₂ machines do use L-series belts. Always verify your machine's belt specification (pitch, width, and profile) before ordering to avoid an incompatible replacement.

How do I convert between the L-belt model number and millimeter pitch line length?

Multiply the model number by 2.54mm to get the pitch line length in millimeters. For example: 120L × 2.54 = 304.8mm. Alternatively, multiply by 0.1 to get inches first (120L = 12.0"), then convert to mm (12.0" × 25.4 = 304.8mm). Each product variant on this page lists both the model number and the exact pitch line length in mm for your convenience.

🛒 Select your model and pitch line length above, then add to cart — ships from our US warehouse.

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