Description
08B Metric Roller Chain Sprocket — Medium-Duty Industrial Power Transmission
The 08B sprocket operates at 12.7mm (1/2 inch) pitch and is one of the most widely specified metric roller chain sprockets in industrial applications. Designed for conveyor systems, agricultural equipment, packaging machinery, and general manufacturing drives where moderate loads and speeds are the norm. We supply 08B sprockets in simplex (08B-1), duplex (08B-2), and triplex (08B-3) configurations with tooth counts from 9 to 114.
Technical Specifications
| المعلمة | 08B-1 | 08B-2 | 08B-3 |
|---|---|---|---|
| يقذف | 12.7 mm (1/2″) | 12.7 mm | 12.7 mm |
| Roller Diameter | 8.51 mm | 8.51 mm | 8.51 mm |
| Internal Width | 7.75 mm | 7.75 mm | 7.75 mm |
| Tooth Count Range | 9 – 114T | 9 – 114T | 9 – 114T |
| مادة | C45 Steel | C45 Steel | C45 Steel |
| Standard | ISO/R 606, DIN 8187 | ISO/R 606 | ISO/R 606 |
Common Speed Ratio Reference
Quick reference for 08B drive-to-driven sprocket tooth count combinations and resulting speed ratios:
| Drive Teeth | Driven Teeth | Ratio | Speed Reduction |
|---|---|---|---|
| 17 | 34 | 2:1 | 50% |
| 17 | 51 | 3:1 | 67% |
| 19 | 57 | 3:1 | 67% |
| 21 | 84 | 4:1 | 75% |
| 15 | 105 | 7:1 | 86% (max recommended) |
Key Features and Advantages
Universal 12.7mm Pitch Compatibility
The 08B pitch of 12.7mm is the most common metric chain size globally. This sprocket is compatible with all ISO 08B roller chains from any manufacturer conforming to ISO/R 606 or DIN 8187 standards.
⚙ CNC Hobbed Teeth
AGMA quality class tooth profiles for uniform chain engagement.
🔥 HRC 40-50 Hardened
Induction hardened teeth with ductile core for 2-3x wear life.
🛠 Precision Bores
0.025mm TIR concentricity. H7 bore tolerance standard.
🏭 Full Traceability
EN 10204 Type 3.1 material certificates available on request.
Versatile Hub Options
Available in A-plate (smaller tooth counts), B-hub single sided, and C-hub double sided configurations. Taper-lock bushed versions also available for rapid installation.
Compatibility
| Component | Specification |
|---|---|
| سلسلة | 08B-1, 08B-2, 08B-3 ISO roller chain (12.7mm pitch) |
| Max Bore (Stock) | 6mm – 40mm depending on tooth count |
| مفتاح الفتحة | DIN 6885 / AS 1403 |
Selection Guide
By Chain: Verify your chain is 08B ISO standard (12.7mm pitch, 8.51mm roller). Do not interchange with ANSI #40 despite identical pitch — roller diameters differ.
By Load: Simplex for standard loads. Duplex provides 1.7x capacity. Triplex provides 2.5x. Select based on the chain horsepower rating chart for your operating speed.
By Environment: Standard C45 steel for dry indoor use. Zinc-plated for outdoor. Stainless steel (SS304/SS316) for food, dairy, chemical, or marine exposure.
Material and Process
Base Material: C45 (1045) carbon steel, 570-700 MPa tensile strength.
Heat Treatment: Induction hardened tooth flanks, HRC 40-50 surface, ductile core retained for shock resistance.
Surface Options: Black oxide (standard), zinc, zinc-nickel, phosphate, electro-polish (stainless only).
Application Scenarios
Agriculture & Grain Handling
Feed augers, grain elevator drives, and harvester header mechanisms. The 12.7mm pitch provides a good balance between load capacity and chain speed for agricultural applications.
Conveyor & Materials Handling
Medium-duty conveyor drives, accumulation systems, and pallet transfer mechanisms. Duplex and triplex configurations for higher load requirements.
Customer Feedback
التعليمات
What is the difference between 08B and ANSI #40?
Can I upgrade from simplex to duplex on an existing drive?
What surface treatment is best for outdoor agricultural use?
Do you stock 08B sprockets for immediate dispatch?
Are taper-lock versions available in 08B?
Related Products
08B Roller Chains
تروس التوصيل
جلبات ذات قفل مخروطي
Installation Guide
1. Confirm 08B chain pitch compatibility. Verify tooth count, bore, and keyway match.
2. Slide sprocket onto shaft, insert key, and tighten set screws to specification.
3. Align drive and driven sprockets to within 0.5mm per 300mm centre distance.
4. Install chain with 2-3% sag on slack side. Use a chain breaker tool for connecting links.
5. Lubricate with ISO VG 30-50 oil. Run at low speed for 30 minutes and recheck alignment.
Maintenance
Lubrication: ISO VG 30-50 oil applied at engagement point. Frequency based on operating hours and environment.
Inspection: Check tooth profiles at each chain change. Replace if hook wear exceeds 25% of tooth thickness.
Life Expectancy: Well-maintained 08B sprocket should last 2-3 chain replacements under normal conditions.
Certifications
✅ ISO 9001:2015 ✅ ISO/R 606 ✅ DIN 8187 ✅ EN 10204 Type 3.1
About Ever-Power Australia
We are a full-range power transmission manufacturer with 15+ years of export experience, an ISO 9001 certified facility, 3,200+ sprocket SKUs, and dedicated engineering support for the Australian market. We provide OEM manufacturing, material certification, and technical selection assistance for every sprocket order.
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