QXG150 8 Tooth Drive Sprocket For Overhead Conveyor
Hangzhou Ocean Industry Co., Ltd. is one of the most experienced manufacturers and suppliers of qxg150 8 tooth drive sprocket for overhead conveyor in China. Welcome to wholesale customized qxg150 8 tooth drive sprocket for overhead conveyor at competitive price from our factory. Good service and quality products are available.
QXG150 8-Tooth Drive Sprocket for 150mm Pitch Overhead Conveyor Chain
In an overhead conveyor drive station, the sprocket is the only component that directly engages with the chain links. Its tooth form accuracy determines how smoothly power transfers from the gearmotor to the entire conveyor loop. When the tooth profile is off by 0.3 mm, the chain experiences periodic shock loading at every revolution, shortening both chain and sprocket life.
The QXG150 8-tooth drive sprocket is machined for 150 mm pitch enclosed-track conveyor chains. The 8-tooth configuration provides a compact drive envelope, making it suitable for installations where the drive station must fit within a confined ceiling space. Each tooth flank is CNC-milled to match the QXG150 link plate profile, then induction-hardened to create a wear-resistant case while preserving a tough core.
A split-hub design allows installation onto the drive shaft without disassembling the entire drive frame. The two hub halves bolt together with high-strength cap screws. For operations that cannot afford extended downtime, keeping a pre-bored spare on the shelf reduces replacement time to under two hours.
Sprocket Function in the Drive System
The drive sprocket converts rotary motion from the gearmotor into linear chain movement. Unlike a friction drive, a toothed sprocket provides positive engagement that does not slip-even when started under full load.
In a typical QXG150 drive station, the sprocket is mounted on a drive shaft supported by two pillow-block bearings. The shaft receives torque from a geared motor via a chain coupling. As the sprocket rotates, its teeth push against the chain link plates, advancing the entire loop. Chain tension on the return strand is maintained by a separate take-up station, ensuring the chain wraps at least 180° of the sprocket circumference.
An 8-tooth sprocket provides 180° of chain wrap with 4 teeth in constant engagement. This is sufficient for most QXG150 applications under 4 kW. For higher power, a 10-tooth or 12-tooth sprocket increases the wrap angle and reduces tooth loading.
Tooth Count Selection Guide
The number of teeth directly affects chain speed variation, tooth load, and drive envelope size. The following table compares available options.
|
Tooth Count |
Chain Speed Variation |
Tooth Load |
Drive Envelope |
When to Specify |
|
6T |
High (±7%) |
High |
Very compact |
Tight space only; not for >2 kW |
|
8T (Standard) |
Moderate (±4%) |
Moderate |
Compact |
General-purpose; up to 4 kW; standard for QXG150 |
|
10T |
Low (±2.5%) |
Lower |
Larger |
>4 kW; smoother motion; longer chain life |
|
12T |
Very low (±1.5%) |
Lowest |
Largest |
High-speed or precision indexing |
Speed variation note: 4% variation is acceptable for painting lines. If the process requires near-constant speed, specify 10T or 12T.
Technical Specifications
|
Parameter |
Specification |
Remarks |
|
Compatible Chain Pitch |
150 mm |
Matches QXG150 / QXG-150 / TXJ-150 |
|
Number of Teeth |
8T (standard) |
10T / 12T available |
|
Pitch Diameter (PCD) |
≈ 392 mm |
PCD = P / sin(180° / N) |
|
Outer Diameter (OD) |
≈ 425 mm |
Varies with tooth form profile |
|
Bore Diameter |
40 / 50 / 60 mm (standard) |
Custom bore up to 80 mm |
|
Keyway |
12×8 / 14×9 / 18×11 mm |
Per ISO/R773; split keyway on split-hub |
|
Hub Style |
Split hub (2-bolt) |
Solid hub available |
|
Body Material |
40Cr alloy steel |
45# or 20CrMnTi on request |
|
Tooth Surface Hardness |
HRC 40–48 |
Induction hardened; core tough |
|
Tooth Form Accuracy |
±0.15 mm |
CNC-milled; template-checked |
|
Dynamic Balance Grade |
G 6.3 (ISO 1940) |
G 2.5 for high-speed |
|
Maximum Drive Speed |
≤ 20 m/min |
Higher speed requires 10T+ |
|
Maximum Drive Power |
≤ 4 kW (8T) |
Use 10T for >4 kW |
|
Approximate Weight |
≈ 22 kg |
Varies with bore and hub |
|
Operating Temperature |
−20 °C to +120 °C |
High-temp grease above 80 °C |
Split-Hub vs Solid Hub
Most QXG150 drive sprockets use a split-hub design for easy installation without removing shaft end components.
|
Split Hub (Standard) |
Solid Hub |
|
|
Installation |
Can install without removing shaft end components |
Requires sliding onto shaft from end |
|
Shaft Fit |
Set-screw + keyway; torque-limited |
Press fit or welding; higher torque |
|
Dynamic Balance |
G 6.3 standard |
G 2.5 easier to achieve |
|
Replacement Speed |
Fast (~1–2 hrs with pre-bored spare) |
Slower (shaft disassembly required) |
|
Typical Use Case |
General replacement / maintenance-friendly |
New drive frame / high torque / OEM build |
Installation and Alignment
Pre-installation checks
• Verify bore diameter and keyway match the drive shaft.
• Check sprocket rotates freely before final tightening.
• Inspect tooth flanks for handling damage.
• Confirm chain wrap angle is at least 180°
Alignment procedure
Sprocket misalignment causes premature tooth wear. The sprocket shaft must be parallel to the chain strand within 1 mm. Use a straightedge to verify.
• Step 1: Install sprocket; tighten set screws to 50% torque.
• Step 2: Rotate by hand; check for binding.
• Step 3: Measure chain-to-sprocket side clearance at 3 points.
• Step 4: Adjust bearings if side clearance varies >1 mm.
• Step 5: Tighten to full torque; use thread-locking compound.
• Step 6: Rotate by hand for 3 revolutions; re-check.
Application Scenarios
Automotive components painting line
QXG150 conveyor with 8-tooth sprocket transports brackets through the paint shop. Compact sprocket fits within ceiling-mounted station alongside ducts.
Appliance assembly conveyor
Washing machine sub-assemblies conveyed at 4–8 m/min. 8-tooth sprocket provides sufficient torque without oversized drive frame.
Electronics handling
For loads under 15 kg per hanger, QXG150 with 8-tooth sprocket is cost-effective. Enclosed track keeps chain clean for electronics areas.
Retrofit of older 150 mm pitch systems
Many facilities operate older 150 mm pitch conveyors. QXG150 8-tooth sprocket interfaces with standard 150 mm pitch chains for retrofit.
FAQ
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