AT Timing Belt – AT3、AT5、AT10、AT20
AT timing belt is mostly used type in industry. It achieves economical drive solutions in the low to medium performance range.
Wear Resistant
High Efficiency
Low Maintenance
Load Capacity
AT Timing Belt Description
Compared with T-type timing belt, AT-type synchronous belt is more precise, it is smaller and has higher efficiency in the same transmission ratio, suitable for fast speed (1000~10000r/min) occasions. The width of the top of the tooth is relatively narrow, and the base of the tooth is relatively wide, which reduces the pressure of the top of the tooth and reduces wear.
Yonghang mainly offers AT3, AT5, AT10 and AT20 PU timing belt. High wear-resistant material and high strength design, which greatly improve belt life service and reduce replacement frequency
Custom sizes and materials available.
AT Profile PU Timing belt has Good resistance against oil, fats and many chemicals.
AT timing belts only run on AT pulleys.
AT timing belts made of TPU can be welded to endless belts. When welded, the perm. tensile force is
reduced to 50%.
AT3 Profile Tooth figure

Description
Part No 10-AT3-300 Belt Type Truly Endless
Length [mm] 300 Pitch [mm] 3
Width [mm] 10 Number of Teeth 100
Tooth Profile AT Belt Type Closed Loop
| Specifications | |
| Trapezoidal Profile | AT3 |
| Tooth Pitch t [mm] | 3 |
| Base Belt Thickness H [mm] | 0.8 |
| Tooth Height h [mm] | 1.1 |
| Overall Belt Thickness H [mm] | 1.9 |
| Width Tolerance [mm] | +/- 0.5 |
| Length Tolerance [mm] | +/- 0.5 |
| Thickness Tolerance [mm] | +/- 0.2 |
| Hardness | 92 Shore A |
| Body Materials | Polyurethane (PU) |
| Tensile Members | Steel |
| Color | White,Yellow, Black, Gray |
| Minimum of Teeth on Pulley | 15 |
| Minimum Pulley Diameter [mm] | 25 |
| Tooth Angle 2β [°] | 50 |
| Rotational Speed | 20000 min-1 |
| Peripheral Speed | 80 ms-1 |
| Ultimate Tensile Strength | 1600 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength M | 400 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength V | 200 |
| [N/10mm belt width] | |
| Power Transmission | <= 5 kW |
| Specific Belt Stiffness Steel Reinforced | 1.00 x 10^5 N |
| [Per unit width/length] | |
| Unit Mass kg/m [Width: 10mm] | 0.022 |
Standard Widths [mm]:
6, 8, 12, 16, 20, 25, 32, 50, 75, 100 mm
Standard Lengths [mm]:
150, 201, 252, 267, 270, 300, 351, 399, 417, 450, 501, 549, 600, 639, 816, 900, 1011 mm
AT3 polyurethane synchronous belts Truly Endless –YONGHAG usually consist of polyurethane body and steel cord, while custom materials available upon request. Special cords include aramid (kevlar), stainless steel and carbon fiber.
AT3 PU timing belts Truly Endless –YONGHAG are most commonly offered in widths of 10mm, 16mm, 20mm, 25mm, 32mm, 50mm, 75mm and 100mm, while custom sizes (lengths, widths and pitches) are available upon request.

AT5 Profile Tooth figure

Description
Part No 15-AT5-500 Belt Type Truly Endless
Length [mm] 500 Pitch [mm] 5
Width [mm] 15 Number of Teeth 100
Tooth Profile AT Belt Type Closed Loop
Tensile Cord Steel Operating Temp C -30 Degrees ~ +90 Degrees C
Body Material PU Operating Temp F -22 Degrees ~ +194 Degrees F
Nylon Fabric PAZ, PAR Cleats On Request
(Note: Custom widths and sizes available upon request)
| Specifications | |
| Trapezoidal Profile | AT5 |
| Tooth Pitch t [mm] | 5 |
| Base Belt Thickness H [mm] | 1.5 |
| Tooth Height h [mm] | 1.2 |
| Overall Belt Thickness H [mm] | 2.7 |
| Width Tolerance [mm] | +/- 0.5 |
| Length Tolerance [mm] | +/- 0.5 |
| Thickness Tolerance [mm] | +/- 0.2 |
| Hardness | 92 Shore A |
| Body Materials | Polyurethane (PU) |
| Tensile Members | Steel |
| Color | White,Yellow, Black, Gray |
| Minimum of Teeth on Pulley | 15 |
| Minimum Pulley Diameter [mm] | 30 |
| Tooth Angle 2β [°] | 50 |
| Rotational Speed | 10000 min-1 |
| Peripheral Speed | 80 ms-1 |
| Ultimate Tensile Strength | 2800 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength M | 700 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength V | 318 |
| [N/10mm belt width] | |
| Power Transmission | <= 15 kW |
| Specific Belt Stiffness Steel Reinforced | 1.75 x 10^5 N |
| [Per unit width/length] | |
| Unit Mass kg/m [Width: 10mm] | 0.033 |
Standard Widths [mm]:
6, 8, 12, 16, 20, 25, 32, 50, 75, 100 mm
Standard Lengths [mm]:
225, 255, 260, 280, 300, 305, 330, 340, 375, 390, 420, 450, 455, 480, 490, 500, 525, 545, 600, 610, 620, 630, 660, 670, 690, 710, 720, 750, 780, 825, 840, 855, 860, 875, 900, 920, 960, 975, 990, 1005, 1020, 1050, 1075, 1100, 1125, 1215, 1380, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2120, 2240, 2360, 2500, 2650, 2800, 3000, 3150, 3350, 3550, 3750, 4000, 4250, 4500, 4750, 5000, 5300, 5600, 6000, 6300, 6700, 7100, 7500 mm
Description
AT5 polyurethane synchronous belts Truly Endless – YONGHANG usually consist of polyurethane body and steel cord, while custom materials available upon request. Special cords include aramid (kevlar), stainless steel and carbon fiber.
AT5 PU timing belts Truly Endless – YONGHANG are most commonly offered in widths of 10mm, 16mm, 20mm, 25mm, 32mm, 50mm, 75mm, 100mm and 150mm, while custom sizes (lengths, widths and pitches) are available upon request.


AT10 Profile Tooth figure

Description
Part No 25-AT10-2500
Length [mm] 2500 Pitch [mm] 10
Width [mm] 25 Number of Teeth 250
Tooth Profile AT Belt Type Closed Loop
Tensile Cord Steel Operating Temp C -30 Degrees ~ +90 Degrees C
Body Material PU Operating Temp F -22 Degrees ~ +194 Degrees F
Nylon Fabric PAZ, PAR Cleats On Request
(Note: Custom widths and sizes available upon request)
| Specifications | |
| Trapezoidal Profile | AT10 |
| Tooth Pitch t [mm] | 10 |
| Base Belt Thickness H [mm] | 2 |
| Tooth Height h [mm] | 2.5 |
| Overall Belt Thickness H [mm] | 4.5 |
| Width Tolerance [mm] | +/- 0.5 |
| Length Tolerance [mm] | +/- 0.5 |
| Thickness Tolerance [mm] | +/- 0.2 |
| Hardness | 92 Shore A |
| Body Materials | Polyurethane (PU) |
| Tensile Members | Steel |
| Color | White |
| Minimum of Teeth on Pulley | 15 |
| Minimum Pulley Diameter [mm] | 50 |
| Tooth Angle 2β [°] | 50 |
| Rotational Speed | 10000 min-1 |
| Peripheral Speed | 60 ms-1 |
| Ultimate Tensile Strength | 6800 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength M | 1700 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength V | 850 |
| [N/10mm belt width] | |
| Power Transmission | <= 70 kW |
| Specific Belt Stiffness Steel Reinforced | 4.25 x 10^5 N |
| [Per unit width/length] | |
| Unit Mass kg/m [Width: 10mm] | 0.058 |
Standard Widths [mm]:
10, 12, 16, 20, 25, 32, 50, 75, 100, 150 mm
Standard Lengths [mm]:
400, 440, 500, 530, 560, 580, 600, 610, 630, 66, 700, 720, 780, 800, 810, 840, 850, 880, 890, 920, 960, 970, 980, 1000, 1010, 1050, 1080, 1100, 1150, 1200, 1210, 1240, 1250, 1280, 1300, 1320, 1350, 1360, 1400, 1420, 1480, 1500, 1530, 1600, 1700, 1720, 1800, 1860, 1900, 1940, 2000, 2120, 2240, 2360, 2500, 2650, 2800, 3000, 3150, 3350, 3550, 3750, 4000, 4250, 4500, 4750, 5000, 5300, 5600, 6000, 6300, 6700, 7100, 7500, 8000, 9000 mm
Description
AT10 polyurethane synchronous belts Truly Endless – usually consist of polyurethane body and steel cord, while custom materials available upon request. Special cords include aramid (kevlar), stainless steel and carbon fiber.
AT10 PU timing belts Truly Endless – most commonly offered in widths of 10mm, 16mm, 20mm, 25mm, 32mm, 50mm, 75mm, 100mm and 150mm, while custom sizes (lengths, widths and pitches) are available upon request.


AT20 Profile Tooth figure

Description
Part No 50-AT20-5000
Length [mm] 5000 Pitch [mm] 20
Width [mm] 50 Number of Teeth 250
Tensile Cord Steel Operating Temp C -30 Degrees ~ +90 Degrees C
Body Material PU Operating Temp F -22 Degrees ~ +194 Degrees F
Nylon Fabric PAZ, PAR Cleats On Request
(Note: Custom widths and sizes available upon request)
| Specifications | |
| Trapezoidal Profile | AT20 |
| Tooth Pitch t [mm] | 20 |
| Base Belt Thickness H [mm]3 | 3 |
| Tooth Height h [mm] | 5 |
| Overall Belt Thickness H [mm] | 8 |
| Width Tolerance [mm] | +/- 1 |
| Length Tolerance [mm] | +/- 0.5 |
| Thickness Tolerance [mm] | +/- 0.4 |
| Hardness | 92 Shore A |
| Body Materials | Polyurethane (PU) |
| Tensile Members | Steel |
| Color | White,Yellow, Black, Gray |
| Minimum of Teeth on Pulley | 18 |
| Minimum Pulley Diameter [mm] | 120 |
| Tooth Angle 2β [°] | 50 |
| Rotational Speed | 6500min-1 |
| Peripheral Speed | 40ms-1 |
| Ultimate Tensile Strength | 8960 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength M | 2240 |
| [N/10mm belt width] | |
| Maximum Allowable Tensile Strength V | 1066 |
| [N/10mm belt width] | |
| Power Transmission | >= 200 kW |
| Specific Belt Stiffness Steel Reinforced | 5.60 x 10^5 N |
| [Per unit width/length] | |
| Unit Mass kg/m [Width: 10mm] | 0.096 |
Standard Widths [mm]:
25, 32, 50, 75, 100, 150 mm
Standard Lengths [mm]:
1000, 1100, 1200, 1260, 1500, 1600, 1700, 1760, 1800, 1900, 1960, 2000, 2120, 2240, 2360, 2500, 2660, 2800, 3000, 3160, 3360, 3560, 3760, 4000, 4260, 4500, 4760, 5000, 5300, 5600, 6000, 6300, 6700, 7100, 7500, 8000, 8500, 9000 mm
AT20 polyurethane synchronous belts Truly Endless – YONGHANG usually consist of polyurethane body and steel cord, while custom materials available upon request. Special cords include aramid (kevlar), stainless steel and carbon fiber.
AT20 PU timing belts Truly Endless – YONGHANG are most commonly offered in widths of 10mm, 16mm, 20mm, 25mm, 32mm, 50mm, 75mm, 100mm and 150mm, while custom sizes (lengths, widths and pitches) are available upon request.


Belts joint
Truly Seamless (moulded)
Endless with joint
Open Ended
Tensile Cords
Steel Cords
Reinforced Steel Cords
Stainless Steel Cords
Aramid Kevlar Cords
Extra Flexible Steel Cords
Reducing Sliding Resistance
Nylon Fabric on Tooth Side (PAZ / NFT)
Nylon Fabric on Back Side (PAR / NFB)
Nylon Fabric on Tooth Side & Back Side (PAZ/PAR)
Mechanical properties
Friction / adhesion
Abrasion resistance
Wear resistance
Release
Cut resistance
Compressibility
Physical properties
Antistatic
Electrical conductivity
Flame retardant
Cold resistance
Hydrolysis resistance
Chemical properties
Oil and fat resistance
Food approved
Easy to clean
Acid and base resistance
Ozone and UV resistance
Applications
apply to construction machines, pumps, paper-making machines, compressors, textile machines, roller-table drives
FAQ
What are differences between T and AT series timing belt?
Tooth Shape Design: T series is standard trapezoidal tooth shape, while AT is enhanced trapezoidal tooth shape with deeper tooth root.
Load Capacity: T series synchronous belt is suitable for low or medium load, while AT is ideal for high load and high torque transmission.
Transmission Accuracy: Compared with T series toothed belt, AT has higher accuracy and favorable for more complex application situation.
Does AT timing belt support reverse bending?
AT timing belts can withstand reverse bending to some extent, but frequent reverse bending may accelerate aging and wear. For applications requiring frequent reverse bending, specially designed timing belts are recommended
Can we get belt sample before we place order?
Yes, of course, timing belt sample is available. Before placing formal order, we can send you small timing belt sample for you to check belt teeth model and material.
How can AT timing belt avoid tooth skipping?
Ensure Alignment Accuracy: Ensure alignment accuracy of belt pulley and timing belt to avoid mismatch between belt teeth and pulley teeth.
Appropriate Tension: Keep the tension of the timing belt within the appropriate range to avoid too tight or too lose.
Avoid Overload: Do not expose the toothed belt to operating conditions exceeding its rated load.
Contact Details