Звездочки для оборудования для перемещения рулонов
Roll handling machinery in textile mills, paper mills, and film extrusion plants manages enormous rolls of fabric, paper, plastic film, or foil through unwind, slitting, rewinding, and transport operations. Roll handling chain drive sprockets must combine precision tooth geometry for accurate web tension control, consistent pitch accuracy for synchronised multi-stand drives, and long service intervals in environments that may involve chemical sizing agents, paper dust, or textile fibre contamination. Explore our precision sprocket range →
Обзор
Roll handling chain drives in paper and textile production serve several critical functions:
- ✓Unwind stand drives: Precision ANSI #40 or ISO 08B chain drives on motorised unwind stands control the web tension as the parent roll unwinds, ensuring consistent tension at the point of processing.
- ✓Rewind/slitter drive synchronisation: Multiple sprockets on a common chain drive synchronise the speeds of adjacent slitter-winder shafts to maintain equal tension across slit widths.
- ✓Roll transport conveyors: Heavy-duty ANSI #80 or #100 chain sprockets move large paper or fabric rolls (up to 10 tonnes) through the production hall on roll-handling conveyor systems.
- ✓Roll lift and positioning drives: ANSI #60 or #80 chain drives on automated roll lifts and turntables position rolls for crane pickup or machine loading.
Технические характеристики
| Параметр | Roll Handling Value | Диапазон |
|---|---|---|
| Chain Standard (precision drives) | ANSI #40 / ISO 08B-1 | ANSI #35–#50 / ISO 06B–10B |
| Chain Standard (roll transport) | ANSI #80 / #100 | ANSI #60–#120 |
| Pitch (precision) | 12.7 mm | 9.525–15.875 mm |
| Machining Grade (precision) | Класс DIN 6 | Grade 5 for servo tension control |
| Pitch Accuracy | ±0.005 mm | ±0.003 mm (Grade 5) |
| Материал | C45 induction-hardened | 40Cr alloy for roll transport |
| Твердость зуба | HRC 50–58 | HRC 48–62 |
| Хаб Стиль | Finished bore or taper-bushed | — |
| Допуск на диаметр канала ствола | H7 | H6 for tension-control drives |
| Поверхность | Black oxide (dry environment) | Zinc plate (humid paper mill) |
| Стрэнд | Simplex | Duplex for large roll transport |
| Speed Range | 0.1–5.0 m/s | Web-dependent |
| Operating Environment | Paper/fibre dust, sizing chemicals | — |
| Смазка | Auto drip or manual | Dry-film in clean-room textile |
| Документация | Dim. report on request | — |
| Класс обработки | Класс DIN 6 | — |
| Thermal Deformation | ≤0,05 мм | — |
| Weight (ANSI #40 Z=19) | ~0.45 kg | 0.1–25 kg |
| Runout (TIR) | ≤0,05 мм | — |
Преимущества в производительности
🌙
Precision Web Tension ControlGrade 6 CNC-hobbed tooth profiles ensure consistent chain pitch engagement on tension-control drives, eliminating the velocity variation that causes web tension fluctuation, break-outs, and registration errors on precision textile or paper processing lines.
⚙️
Synchronised Multi-Stand DrivesMatched sprocket sets with consistent pitch diameters are critical for synchronised slitter-winder drives. We can supply matched pairs with identical measured pitch diameters for critical synchronisation applications.
💪
Heavy Roll Transport Capacity40Cr alloy ANSI #80 and #100 sprockets for roll transport conveyor drives handle the weight of large paper or fabric rolls (up to 10+ tonnes) on powered roll-handling conveyor systems with extended service life.
🌃
Chemical-Resistant CoatingPaper mill sizing agents and textile chemical finishes can attack standard carbon steel. Dacromet or zinc-nickel coated sprockets resist chemical attack from common mill chemicals including alkaline sizing, starch, and textile dye bath splashing.
Информация о совместимости
| Application / Chain | Рекомендуемая звездочка | Примечания |
|---|---|---|
| Unwind stand tension drive (ANSI #40 / ISO 08B) | ANSI #40 or ISO 08B Grade 6 sprocket | Precision tension control |
| Slitter-winder sync drive (ANSI #40) | Matched ANSI #40 sprocket pair | Equal pitch dia. for synchronisation |
| Roll transport conveyor (ANSI #80) | ANSI #80 40Cr alloy sprocket | Up to 10-tonne roll weight |
| Roll lift drive (ANSI #60 / #80) | ANSI #60 or #80 C45 induction-hardened | Type B or C hub |
| Textile warping machine (ANSI #40 / ISO 08B) | Grade 6 precision sprocket | Accurate thread-count control |
| Voith, Valmet paper machine drives (ref only) | ANSI or ISO equivalent per chain | Brand reference; verify pitch |
| Karl Mayer, Jakob Muller textile drives (ref only) | ISO 06B / 08B precision sprocket | European textile OEM standard |
Руководство по выбору
1
🌙 Precision drive vs. load driveFor tension-control and synchronisation drives: specify Grade 6 CNC hobbing, H6 bore tolerance, and runout ≤0.05 mm. For roll transport: specify 40Cr alloy, H7 bore, Type C hub. Do not apply the same specification to both — they have different primary requirements.
2
📈 Web tension calculationCalculate required chain pull from web tension (N/m width) × web width. Add friction and inertia components for the drive sizing. This determines chain pitch and motor power for the unwind/tension drive.
3
🔧 Synchronisation matchingFor synchronised slitter-winder drives, specify matched pitch diameter pairs (measured within ≤0.02 mm of each other). Contact our team for matched-pair supply with individual measurement records.
4
🔊 Chemical compatibilityIdentify the chemical environment (paper sizing, starch, dye bath, bleach). For alkaline environments: dacromet coating. For strong acid or chlorine exposure: SS304. For dry textile environments: black oxide acceptable.
Installation for Roll Handling Sprockets
- Isolate all drives including web-brake systems on unwind stands before accessing chain drives. Web under tension can create sudden machine movement.
- Mark the chain position on precision tension drives before removal — some tension-control chains use a specific timing relationship between drive and driven sprockets.
- Remove old sprocket with appropriate tool. For H6 precision fits, use an arbor press or bearing puller — do not hammer.
- Clean shaft and bore with chemical-compatible solvent (verify solvent compatibility with mill chemicals present).
- Установите новую звездочку. For Grade 5 or H6 precision drives, verify runout (TIR ≤0.03 mm) with a dial indicator before final fastener torquing.
- Align with mating sprocket: For precision tension drives, target ≤0.2 mm lateral offset. Use a laser alignment tool.
- Install chain and set tension to 2% sag on slack side. For tension-control drives, verify that chain tension does not add a significant bias to the web tension measurement.
- Test at slow speed through a full roll cycle before returning to production speed.
Troubleshooting Roll Handling Sprocket Issues
| Симптом | Вероятная причина | Рекомендуемые действия |
|---|---|---|
| Web tension variation | Worn sprocket causing velocity ripple | Replace with Grade 6 precision sprocket |
| Slitter-winder speed mismatch | Unequal pitch diameter between sync sprockets | Replace with matched-pair sprockets |
| Sprocket corrosion from paper sizing | Insufficient coating for mill chemical environment | Upgrade to dacromet or SS304 sprocket |
| Chain noise on precision drive | Неправильный прикус или стертые зубы | Laser realign; replace if tooth wear >10% |
| Roll transport chain derailing | Worn sprocket or misalignment | Inspect teeth; realign; replace as needed |
Примеры успешных сделок с австралийскими клиентами
“We replaced the tension-control unwind stand sprockets with Ever-power Grade 6 ANSI #40 precision units. Web tension variation on our newsprint line dropped by 40% after the changeover — directly reducing web break rate. Outstanding improvement from a precision sprocket specification.”
“The dacromet-coated sprockets on our fabric-finishing chemical range have resisted the alkaline dyeing chemicals for 16 months without any corrosion. Previously replacing carbon-steel sprockets every 4 months due to pitting. Very satisfied with Ever-power’s product knowledge and service.”
“Good quality precision sprockets for our film unwind drives. The grade 6 hobbing is visibly better than generic alternatives. Delivery to Geelong was fast. Four stars because the lead time on matched-pair supply was slightly longer than expected.”
Часто задаваемые вопросы
+ How does sprocket precision affect web tension control on an unwind stand?
On a motorised unwind stand, the chain drive controls the braking or motoring torque applied to the unwind shaft. Any variation in sprocket pitch (from worn or imprecise teeth) creates velocity ripple at the chain pitch frequency, which directly modulates the web tension. For newsprint or thin film applications, this tension variation causes web breaks. Specifying Grade 6 or Grade 5 precision hobbing minimises this velocity ripple.
+ What does ‘matched pair’ supply mean for slitter-winder synchronisation drives?
In a slitter-winder, multiple rewind shafts are driven from a common chain at the same speed. If the pitch circle diameters of the individual drive sprockets differ even slightly, the peripheral speeds will differ, causing tension imbalance across the slit widths. Matched-pair supply means we measure the actual pitch diameter of each sprocket and supply pairs that are within a specified tolerance (typically ≤0.02 mm difference) for use in synchronisation drives.
+ What lubrication is compatible with textile chemical environments?
In textile mills with dye bath or sizing agent splash risk, use synthetic chain oil (ISO VG 46–68 synthetic) rather than petroleum-based mineral oil, as many petroleum oils are incompatible with textile chemicals and can cause staining. For cleanroom textile (white goods or medical textile) applications, dry-film PTFE lubricant is preferred to eliminate any lubricant residue on the fabric.
+ How do I prevent paper dust accumulation on precision roll-handling sprocket drives?
Paper dust in a dry paper mill is highly abrasive and acts as grinding compound on sprocket teeth. Use fully enclosed chain guards with no gaps or perforations. Apply a thin-film automatic chain lubricator (one metered drop per link per 4–8 hours) to flush dust from the chain and sprocket teeth. Avoid heavy grease lubrication which traps paper dust and accelerates wear.
+ Can sprockets on unwind stand chain drives be replaced without recalibrating web tension?
Yes, if you replace with an identical pitch diameter sprocket. If the replacement sprocket has a different pitch diameter (even slightly), the chain speed will change and the web tension control system must be recalibrated. Always measure the pitch diameter of the replacement sprocket before installation if the machine uses feedback tension control.
+ Do you supply sprockets for European textile machinery (Karl Mayer, Jakob Muller, etc.)?
Yes. European textile machinery predominantly uses ISO 606 chain standards (ISO 06B, 08B). We supply ISO 06B-1 and ISO 08B-1 precision sprockets with Grade 6 hobbing, finished bore to your shaft specification, in C45 or SS304 for chemical-environment positions. Brand names are referenced for cross-identification only.
+ What is the service interval for precision roll-handling chain drive sprockets?
In clean, well-lubricated textile and paper mill environments, Grade 6 precision ANSI #40 or ISO 08B-1 sprockets typically last 15,000–25,000 operating hours (4–7 years on a two-shift operation). Inspect annually for tooth-tip wear and bore fretting. Replace at 10% tooth height loss (lower threshold than general industrial) to maintain web tension precision.
+ Can you supply sprockets for servo-driven unwind stands?
Yes. For servo-driven tension control applications requiring very tight velocity control, we can supply Grade 5 precision sprockets with runout TIR ≤0.025 mm and measured pitch diameter data included. Specify the servo motor encoder resolution and control system bandwidth and our engineering team will recommend the appropriate precision grade.
+ Are zinc-coated sprockets safe in a paper mill environment?
Standard zinc plate (96-hour salt spray) may corrode in high-humidity paper mill environments with alkaline or acidic vapours from paper production. Dacromet (480+ hours salt spray) is preferred for paper mill sprockets. For zones with direct contact with sizing chemicals, SS304 stainless or nickel-plated carbon steel is recommended.
+ Do you supply roll-transport conveyor chains and sprockets as a complete set?
Yes. For roll transport conveyor installations or refurbishments, we supply matched conveyor chain and sprocket sets: heavy-duty ANSI chain (with or without rollers for roll support) plus matched head and tail sprockets finished to your shaft specification. Contact our sales team for a complete conveyor drive set quotation.
Сопутствующие товары: Цепи трансмиссии
⛓️ Совместимые трансмиссионные цепи
Мы производим и поставляем полный ассортимент продукции. роликовые приводные цепи paired with every sprocket — ANSI, ISO, double-pitch, stainless, and special-purpose chains for all industrial applications.
Standards & Certifications
All Ever-power Australia sprockets are manufactured to the following international standards:
✓ ISO 9001:2015✓ ANSI B29.1✓ ISO 606✓ DIN 8187✓ JIS B 1801✓ Стандарты BS
Приверженность качеству: Контроль размеров по стандарту 100%, тестирование твердости партий и полная прослеживаемость на каждом этапе производства. Сертификаты испытаний материалов предоставляются по запросу.
Почему стоит выбрать Everpower Australia?
We are a vertically integrated sprocket manufacturer with 25+ years of chain drive expertise. Our 35,000 m² facility produces 4 million+ sprockets per year to ISO, ANSI, JIS, DIN, BS and GB standards, ISO 9001 certified. Our manufacturing →
ISO 90014M+ pcs/yrВозможность работы с OEM-производителямиAU Stock
Готовы сделать заказ или нужна техническая консультация?
Our engineering team provides free selection support and fast quotes. Australian stock on core sizes — same-week dispatch on standard sprockets.
