Heavy-Duty 45# Steel Synchronous Pulley, 2-Groove
Precision-Machined Assembly
Product Overview
A precision-machined, double-groove synchronous pulley designed for
high-torque power transmission. Constructed from 45# steel, it
features accurately cut tooth profiles that ensure zero slippage
and perfect synchronization with HTD or similar timing belts. The
assembly is engineered for applications requiring robust
performance, offering excellent resistance to deformation and wear
in continuous operation cycles.
This 2-groove synchronous pulley assembly is built to outperform in
the toughest industrial environments. It combines robust 45# steel
construction with precision CNC machining to deliver:
Heavy-Duty Performance: Manufactured from 45# steel for superior
tensile strength and long-term durability under high loads.
Precision-Machined Accuracy: Guarantees perfect groove geometry and
balance, minimizing belt wear and vibration for smooth, efficient
operation.
Reliable Synchronization: The dual-groove design maintains precise
timing and power distribution across multiple belts, eliminating
slippage.
Product parameters
| Parameter Category | Specification | Details / Value |
|---|
| General | Product Type | Synchronous Pulley (Timing Pulley) Assembly |
| Groove Quantity | 2 |
| Design Style | Heavy-Duty |
| Material & Finish | Primary Material | 45# Steel (AISI 1045) |
| Surface Treatment | Black Oxide (Standard), Zinc Plating, or as requested |
| Hardness | 20-30 HRC (as machined) |
| Key Dimensions | Belt Pitch | e.g., 3M, 5M, 8M, 14M; T5, T10; XL, L, H (Must be specified) |
| Number of Teeth (N) | e.g., 24, 30, 36, etc. (Must be specified) |
| Pitch Diameter (PD) | [Calculated as: PD = N × Pitch / π] (e.g., 45.8 mm) |
| Outer Diameter (OD) | (Dependent on Pitch and Tooth Count) |
| Bore Diameter | Customizable (Standard tolerance: H7) |
| Width / Face Width | (Dependent on Groove Profile and Quantity) |
| Flange | Single or Double Sided (Optional) |
| Dimensional Tolerances | Bore Diameter Tolerance | H7 (Standard) |
| Pitch Diameter Tolerance | ± 0.10 mm |
| Runout Tolerance (Total Indicator Runout) | ≤ 0.05 mm |
| Assembly & Customization | Mounting Style | Plain Bore, Keyway (Square/Woodruff), Setscrews, Taper-Lock
Bushings |
| Balance Grade | G6.3 (Standard) |
| Custom Options | Specific hub design, special markings, lightweight pockets |
FAQ
Q1: What are the primary advantages of using 45# steel for this
pulley?
A: 45# steel (equivalent to AISI 1045) offers an excellent balance
of high strength, good toughness, and machinability. It is
significantly stronger and more wear-resistant than aluminum or
cast iron, making it ideal for heavy-duty applications involving
high loads, shock forces, and continuous operation.
Q2: Which synchronous belt profiles (pitches) are available for
this 2-groove pulley?
A: We can manufacture this assembly to match all common
industry-standard pitches, including:
Metric Pitches: 3M, 5M, 8M, 14M
T-Series (Trapezoidal) Pitches: T5, T10, T20
HTD Pitches: 3mm, 5mm, 8mm
Other Standards: XL, L, H
Please specify your required pitch when inquiring.
Q3: What is the purpose of a double-groove design?
A: The dual-groove configuration serves two main purposes:
Increased Power Transmission: It allows the use of two belts to
transmit twice the power of a single-groove pulley within the same
space.
Enhanced Reliability: It provides redundancy and better load
distribution, which is crucial for critical drives where failure is
not an option.
Customization & Ordering
Q4: What customization options are available for the bore and
mounting?
A: We offer a wide range of mounting solutions to fit your shaft
and assembly needs:
Plain Bore with Setscrews: Standard option for simple mounting.
Keyway & Setscrews: Most common for secure torque transmission. We
offer standard square keyways.
Taper-Lock Bushings: A popular adapter system for easy installation
and removal without heating or pressing.
Custom Bores: Any diameter and tolerance (e.g., H7, press fit) can
be manufactured to your print.
Q5: Can you produce this pulley according to my technical drawing?
A: Absolutely. We specialize in custom manufacturing. Providing
your CAD model or detailed technical drawing is the best way to
ensure the pulley meets your exact specifications for dimensions,
tolerances, and features.
Performance & Durability
Q6: How is the pulley balanced, and why is it important?
A: Our standard pulleys are dynamically balanced to a G6.3 grade,
which is sufficient for most industrial applications. Proper
balancing minimizes vibration at high speeds, leading to smoother
operation, reduced noise, longer bearing life, and increased
overall system reliability. Higher precision grades (like G2.5) are
available for high-speed applications.
Q7: What surface treatments do you offer to prevent rust?
A: 45# steel is susceptible to corrosion. We offer several surface
treatments:
Black Oxide: Provides a sleek black finish with mild corrosion
resistance.
Zinc Plating: Offers excellent corrosion protection (can be clear,
blue, or yellow chromate).
Powder Coating: Provides a thick, durable, and decorative coating
in various colors.
Logistics & Support
Q8: What information do I need to provide to get an accurate quote?
A: To expedite the quoting process, please provide the following:
Pitch and Number of Teeth (e.g., 8M, 30 teeth).
Bore Specification (e.g., 25mm H7 with a 6x6mm keyway).
Quantity Required.
Preferred Surface Treatment.
A technical drawing is the most effective way to convey all
requirements.
Q9: What is your typical lead time for a custom order?
A: Lead times vary based on order complexity and quantity.
Prototype samples can typically be delivered within 4-6-3 weeks,
while production runs may take 6-8 weeks. We always communicate
lead times clearly upon order confirmation.
