Overview — Sprockets for Freight Conveyors
Australia’s mining, ports, and heavy-industry sectors move millions of tonnes of bulk material daily on freight conveyors — from coal in the Hunter Valley to iron ore in the Pilbara. The sprockets driving these conveyors endure enormous chain tensions, abrasive dust, temperature extremes, and non-stop 24/7 operation.
Ever-Power Australia Sprockets Co., Ltd. は製造しています heavy-duty freight conveyor sprockets from alloy and manganese steels, through-hardened or carburised, with abrasion-resistant coatings that extend service life in the harshest Australian environments. Our sprockets are trusted on conveyor systems spanning from pit to port.
Available in ANSI 80 through 240 (and BS equivalents), single through hex-strand, with bores up to 250 mm, our freight sprockets handle working loads exceeding 50 kN per strand. QD, taper-lock, and weld-on hub options suit every installation from new builds to field replacements.
技術仕様
| パラメータ | 標準 | カスタム |
|---|---|---|
| チェーンピッチ | 1″ – 3″ (ANSI 80–240) | Up to 4″ |
| 歯 | 9 – 45 | Up to 80 |
| 海岸線 | Duplex / Triplex | Quad / Hex |
| ハブ | タイプB / C / QD / テーパー | 溶接式／分割式 |
| ボア | 30 mm – 120 mm | Up to 250 mm |
| 材料 | 40Cr / 42CrMo4 | Manganese / Hadfield |
| 硬度 | HRC 45–55 | HRC 60 carburised |
| 表面 | Hot-dip galvanised / Dacromet | Ceramic coat |
| PCD | 80 mm – 1200 mm | Up to 2000 mm |
| プロフィール | ANSI B29.1 / ISO 606 | ヘビーデューティー改造 |
| 最大回転数 | 500 | 800 (balanced) |
| 温度 | –30 °C to +200 °C | –50 °C to +350 °C |
| キーウェイ | DIN 6885 | Double / spline |
| 内径公差 | H7 | H6 |
| TIR | ≤ 0.08 mm | ≤ 0.04 mm |
| 作業負荷 | Up to 50 kN per strand | 100 kN+ |
| 引張 | ≥ 750 MPa | ≥ 1100 MPa |
| 倦怠感 | ≥ 12,000 hrs | ≥ 25,000 hrs |
| 耐摩耗性 | Standard C45 | Hardened overlay / stellite |
| パッケージ | Heavy-duty crate | カスタムパレット |
パフォーマンス上の利点
💪
3× Wear Life
Through-hardened alloy teeth resist the abrasive wear of coal, ore, and grain dust far longer than untreated carbon steel.
🔨
Split-Hub Option
Replace sprockets without dismantling the shaft — cuts maintenance from 8 hours to 2 hours on large conveyors.
🌡
Extreme-Temp Rated
Operates reliably from –50 °C (cold-chain) to +350 °C (cement kilns, smelters) with appropriate alloy selection.
Compared to budget sprockets: Inferior products lack heat treatment, leading to mushroomed teeth within months. Their oversized bore tolerances cause shaft wear that cascades into bearing failure. In a 24/7 mining operation, a single unplanned sprocket change can cost AUD 50,000+ in lost production.
How Sprockets Work in Freight Conveyors
Freight conveyors use chain-and-sprocket drives in several configurations:
▸ Apron feeder drive: A large sprocket (25–45 teeth) meshes with a heavy apron chain (ANSI 160–240 duplex/triplex) to pull overlapping steel pans carrying bulk ore or coal from the hopper to the crusher.
▸ Drag chain conveyor: Twin sprockets drive a submerged chain that drags material (grain, ash, cement) along a trough.
▸ Bucket elevator head sprocket: At the top of the elevator leg, the drive sprocket lifts a chain of buckets filled with material from ground level to the discharge point.
▸ Overland conveyor take-up: Tension sprockets on gravity take-up carriages maintain chain tension on long-distance conveyors.
互換性
| 応用 | チェーンの種類 | 装置* |
|---|---|---|
| Apron Feeder | ANSI 160–240, BS 24B–32B | FLSmidth, Metso, McLanahan |
| Drag Conveyor | ANSI 80–120, Forged link | CDM Systems, Martin Engineering |
| Port Shiploader | ANSI 120–200 Triplex | Sandvik, ThyssenKrupp |
※ブランド名は相互参照のみを目的としており、提携関係はありません。
📊 Conveyor Speed — Chain Pitch × Teeth × RPM Reference
| Chain | Pitch (mm) | 歯 | RPM | Speed (m/min) |
|---|---|---|---|---|
| ANSI 100 | 31.75 | 21 | 25 | 16.67 |
| ANSI 120 | 38.10 | 17 | 30 | 19.43 |
| ANSI 160 | 50.80 | 15 | 20 | 15.24 |
| ANSI 200 | 63.50 | 13 | 15 | 12.38 |
選択ガイド
- Identify conveyor type: apron feeder, drag, bucket, overland.
- Determine chain size, strand count, and working load.
- Measure shaft bore and hub mounting arrangement.
- Assess environment: dust level, moisture, temperature, chemical exposure.
- Choose hub: QD for maintainability, weld-on for permanent installations, split for in-situ change.
Talk to our heavy-industry engineers for site-specific recommendations.
インストール
- Lockout conveyor drive and apply LOTO per AS/NZS 4024.
- Use chain hoist or crane to support chain weight before breaking.
- Remove old sprocket (hydraulic puller for press-fit hubs).
- Inspect and clean shaft; check for scoring and corrosion.
- Heat-shrink fit or key new sprocket to shaft; torque to spec.
- Align with laser alignment tool; ≤ 1 mm per 1 m span for heavy conveyors.
- Rejoin chain; set tension per OEM conveyor manual.
- Lubricate chain and sprocket with EP grease (NLGI 2).
- Run at creep speed; check chain tracking around all sprockets.
- Load test at 75% then 100% capacity before returning to service.
トラブルシューティング
Chain climbing over sprocket
原因： Severe chain elongation (> 3%) or worn teeth. 修理： Replace chain and sprocket simultaneously.
Rapid tooth wear
原因： Abrasive material (sand, ore fines) packing into chain joints. 修理： Upgrade to alloy-hardened sprocket; install chain-wash station.
Sprocket hub cracking
原因： Shock loads from oversized material or chain jam. 修理： Install shear-pin coupling or torque limiter; upgrade to 42CrMo4 alloy sprocket.
Corrosion pitting on teeth
原因： Acidic runoff from sulfide ores or chemical exposure. 修理： Switch to hot-dip galvanised or ceramic-coated sprockets.
Chain vibration at high speed
原因： Sprocket imbalance or resonance with conveyor structure. 修理： Replace with dynamically balanced sprocket; add damper to structure.
事例研究
📍 Newcastle, NSW — Coal Loading Terminal
4.2 km overland conveyor, ANSI 160 triplex, 5,000 t/hr throughput. Sprocket replacement every 5 months.
結果： 42CrMo4 carburised 21T triplex. Service life extended to 16 months. AUD 120,000/yr saved.
“A game-changer for our maintenance budget and safety record.” — Terminal Maintenance Manager
📍 Port Hedland, WA — Iron Ore Apron Feeder
Apron feeder below primary crusher, ANSI 240 duplex, extreme dust and 45 °C ambient.
結果： Manganese-steel sprockets with split hubs. Replacement time reduced from 12 hours to 3 hours; tooth life doubled.
“The split hub alone saved us 9 hours of downtime per change-out.” — Mine Mechanical Supervisor
📍 Gladstone, QLD — Alumina Refinery Drag Conveyor
Caustic environment, 85 °C process temperature, ANSI 120. Standard sprockets corroding in 6 weeks.
結果： Ceramic-coated alloy-steel sprockets. First inspection at 9 months: minimal wear, zero corrosion.
“Corrosion was our biggest enemy — it’s no longer a factor.” — Refinery Reliability Engineer
📍 Melbourne, VIC — Container Terminal
Automated container handling conveyor, ANSI 100 duplex, 20 hr/day operation.
結果： Dacromet-coated QD-hub sprockets. 14-month service life vs. 6-month previous. Fewer unplanned container delays.
“Reliable sprockets mean reliable container throughput — critical for our KPIs.” — Terminal Operations
📍 Whyalla, SA — Steel Mill Conveyor
Hot material conveyor, 150 °C ambient, ANSI 120 triplex.
結果： Heat-resistant alloy sprockets rated to 350 °C. Chain and sprocket life improved 2.5× over standard C45 parts.
“These sprockets handle the heat that destroyed our previous supplier’s products.” — Maintenance Planner
よくある質問
Do you supply sprockets for mining-grade conveyors?
Yes. Our heavy-duty range covers ANSI 80 through 240 in alloy and manganese steels for the toughest mining applications.
Can you supply weld-on sprocket blanks?
Yes. We supply unmachined or semi-machined blanks for on-site welding to existing structures.
What is your delivery capability for remote mine sites?
We ship direct to mine sites via road freight. Express air to regional airports available for urgent orders.
Do you offer sprocket reconditioning?
We evaluate worn sprockets and advise whether reconditioning (re-hardfacing teeth) is viable or replacement is more economic.
Can you match an OEM conveyor sprocket from a drawing?
Yes. Provide the drawing, and we manufacture to spec. We routinely produce to Metso, FLSmidth, and Sandvik drawings.
What testing do heavy-duty sprockets receive?
Ultrasonic, magnetic particle, hardness, and CMM dimensional inspection. Reports included.
Do you supply to EPCM contractors?
Yes. We supply to major EPCM firms for greenfield and brownfield mining projects across Australia.
What surface treatment resists acidic ore environments?
Ceramic coating or hot-dip galvanising for pH < 4 environments. Our engineers specify per your conditions.
Can I get sprockets on consignment?
VMI and consignment programs available for mine-site warehouses under annual supply agreements.
Is your pricing competitive with imported heavy-duty sprockets?
We offer factory-direct pricing with shorter lead times and local support. Request a competitive quotation via our お問い合わせページ.
Related — Transmission Chains
当社の製品と組み合わせてください heavy-duty roller chains and engineering-class chains for complete freight-conveyor drive solutions.
資格認定
✅ ISO 9001:2015 | ✅ ANSI B29.1 / ISO 606 | ✅ AS 1755 (Conveyors) | ✅ EN 10204 3.1 | ✅ RoHS | ✅ CE
なぜエバーパワー・オーストラリア・スプロケット株式会社を選ぶのか？
私たちは製造してきました heavy-duty sprockets for 20+ years, serving mining, ports, cement, steel, and power-generation industries across Australia and 50+ countries. Our 25,000 m² factory handles everything from 200 g micro-sprockets to 120 kg apron-feeder monsters. Australian warehouse stock, rapid turnaround for breakdowns, and full OEM/ODM capability.
Move More Material — Contact Us
Built for the loads Australia demands.
From pit to port, Ever-Power Australia Sprockets Co., Ltd. supplies heavy-duty sprockets that keep your freight moving. Contact our engineering team for site-specific recommendations.
