Pignoni per macchine da forno

da | 2 aprile 2026 | Pignoni

Pignoni per macchine da forno

Industrial baking machinery — tunnel ovens, rack ovens, bread moulders, proofers, spiral coolers, and depositing machines — relies on roller chain drives that must perform reliably in environments ranging from ambient temperature dough-processing rooms to 280°C oven interiors. The bakery chain drive sprocket must combine thermal stability, abrasion resistance (from flour dust), hygiene compliance, and long service intervals in a production environment that rarely stops. Explore food-grade sprockets for baking →

Tunnel oven chain drive sprocket bakery

Panoramica

Industrial bakery production in Australia operates on continuous chains: bread is moulded, proofed, transferred to the oven on the baking band or tray conveyor, baked at temperatures up to 280°C, cooled on spiral or linear cooling conveyors, sliced, and packed — all in a continuous chain-driven process. Chain drives are present at every stage, from the flour intake auger to the finished-product packing system. The critical sprocket positions in a bakery are:

  • ✓Tunnel oven chain drive: Large ANSI #80 or #100 sprockets driving the oven band or tray conveyor at 200–280°C. Must withstand sustained heat without lubricant breakdown.
  • ✓Proofer transport chain: ANSI #50 or ISO 10B sprockets on the proofing chamber conveyor running at 35–50°C with high humidity — corrosion-resistant finish required.
  • ✓Spiral cooler drive: ANSI #60 sprockets driving the spiral cooling conveyor belt at ambient to cool temperatures. Low speed, high continuous load.
  • ✓Moulder conveyor drives: Small ANSI #35 or #40 sprockets on flour-dusty dough-processing conveyors. Abrasion from flour dust is the dominant wear mechanism.
  • ✓Depositing and cutting machines: ANSI #40 or ISO 08B precision drives requiring accurate tooth profiles for consistent product positioning.

Specifiche tecniche

Parametro Baking Machinery Value Allineare
Tunnel oven chain standard ANSI #80 / #100 ANSI #60–#120
Proofer / cooler chain standard ANSI #50 / #60 or ISO 10B / 12B —
Moulder / depositor chain ANSI #35 / #40 or ISO 06B / 08B —
Tunnel oven operating temperature +180°C to +280°C —
Proofer operating temperature +35°C to +50°C, high humidity —
Material (oven zone) C45 or heat-resistant alloy steel SS316 for washdown oven zones
Material (product-adjacent zone) SS304 / SS316 FSANZ / FDA compliant
Tooth Hardness (C45 oven) HRC 50–60 —
Surface (oven zone) Plain or heat-resistant coating No zinc/cadmium in oven zone
Lubrication (oven chain) High-temp chain lubricant (FDA H1) NSF H1 grade mandatory
Stile Hub Type B / Type C for oven drives Taper-bushed for cooler drives
Tolleranza del foro H7 H6 on request
Spiaggia Simplex / Duplex for oven drives —
Grado di lavorazione Grado DIN 6 —
Max Tooth Runout ≤0,05 mm —
CIP Resistance (washdown zone) SS304/316 full CIP compatible —
Documentazione MTC + dim. report —
Operating life target 12,000+ hours —
Weight (ANSI #80 Z=17) ~3.8 kg —

Vantaggi in termini di prestazioni

🔥 Oven-Zone Thermal Stability C45 induction-hardened sprockets maintain structural integrity and tooth geometry at sustained oven temperatures up to 250°C. We do not use zinc-plated or cadmium-coated sprockets in oven zones — zinc decomposes above 420°C producing fumes, and any coating degradation in the food zone is unacceptable.
🔒 Food-Safe Material in Product Zones SS304 stainless for product-adjacent zones, with polished tooth flanks (Ra 0.8–1.6 μm) that meet FSANZ and FDA surface-finish requirements. Full material traceability on request.
📏 Flour-Abrasion Resistant HRC 50–60 induction-hardened C45 teeth resist the rapid abrasive wear caused by flour dust on moulder and dough-conveyor chain drives — the same abrasion mechanism that destroys unhardened sprockets within weeks in a high-output bakery.
⚙️ High-Temperature Chain Compatibility Our oven-zone sprockets are dimensionally matched to common high-temperature oven chain specifications (ANSI #80 and #100 heat-resistant chain). We can supply the matching chain on request for a complete oven drive replacement.

Informazioni sulla compatibilità

Bakery Machine / Chain Pignone consigliato Note
Tunnel oven band drive (ANSI #80) ANSI #80 C45 high-temp sprocket Plain/heat-resistant finish only in oven zone
Tunnel oven band drive (ANSI #100) ANSI #100 heavy-duty sprocket Large industrial tunnel ovens
Proofer transport chain (ANSI #50 / ISO 10B) ANSI #50 or ISO 10B SS304 sprocket High humidity → corrosion-resistant
Spiral cooler drive (ANSI #60) ANSI #60 SS304 / zinc-plate sprocket Product-adjacent? SS304. Enclosed? Zinc.
Moulder conveyor (ANSI #35 / #40) ANSI #35 or #40 C45 hardened sprocket Flour-abrasion environment
Depositing machine chain (ANSI #40 / ISO 08B) ANSI #40 or ISO 08B Grade 6 sprocket Precision hobbing for consistent spacing
Mecatherm, AMF, Rademaker oven chains (ref only) ANSI #80 / #100 interchangeable Brand reference only; verify tooth count
Travaglini, Kaak, WP oven systems (ref only) ANSI or ISO per chain measurement Confirm chain standard before ordering

Selection Guide

1
🔥 Identify the zone: oven vs. ambientOven zone (>80°C): C45 plain or heat-resistant coating. No zinc plate in oven. Product-adjacent zone: SS304 stainless. Non-product ambient zone: C45 zinc or dacromet acceptable.
2
📏 Measure chain pitchTunnel oven chain pitch: ANSI #80 = 25.4 mm; ANSI #100 = 31.75 mm. Moulder/proofer: ANSI #50 = 15.875 mm; ANSI #40 = 12.7 mm. Measure 10 links to confirm pitch; confirm roller diameter for ANSI vs ISO distinction.
3
🔓 Count teeth & measure shaftFor direct replacement: same tooth count as original. For speed change: recalculate ratio from required conveyor speed, gearbox RPM, and chain pitch. Measure shaft diameter for bore specification.
4
🧾 Lubrication selectionOven-zone chain: NSF H1 food-grade high-temperature chain lubricant (rated to 250°C+). Proofer zone: NSF H1 food-grade oil applied by drip or automatic lubricator. Moulder zone: dry-film PTFE or light chain oil (no excess oil that attracts flour accumulation).

Installation for Bakery Chain Drive Sprockets

  1. Coordinate with production scheduling — bakery lines rarely stop. Schedule the sprocket change during planned sanitation or line-change maintenance windows.
  2. Allow oven zone to cool to <50°C before working on oven chain drives. Use heat-resistant gloves throughout.
  3. Isolate drives and lock out. Bakery drives are often interlocked — verify all interlock points before entering machine guards.
  4. Remove guards and access covers. Photograph chain routing in complex positions before disassembly.
  5. Remove old sprocket using appropriate tools (two-jaw puller for plain-bore; jack bolts for taper-bushed).
  6. Clean shaft with food-safe solvent. Do not use petroleum-based solvents in food-zone areas — use an approved food-equipment cleaner.
  7. Install new sprocket. Use A4 stainless fasteners in food-adjacent zones to prevent galvanic corrosion and contamination.
  8. Align sprockets. Target ≤0.3 mm lateral offset for precision bakery drives.
  9. Lubricate chain with appropriate NSF H1 food-grade chain lubricant before restarting — do not start an oven chain dry.
  10. QA sign-off — bakery facilities under SQF, BRC, or HACCP schemes require maintenance records and sign-off before restarting food production.

Troubleshooting Baking Machinery Sprockets

Sintomo Causa probabile Azione consigliata
Oven chain jumping Worn oven drive sprocket tooth tips hooked Replace oven sprocket (and chain)
Corrosion on proofer sprocket Insufficient material for high-humidity zone Replace with SS304 stainless
Rapid flour-zone sprocket wear Unhardened sprocket in flour-abrasive environment Upgrade to HRC 52–60 induction-hardened
Depositing machine registration error Worn teeth increasing pitch backlash Replace with Grade 6 precision sprocket
Chain lubricant smoke in oven zone Wrong lubricant (non-H1 or low flash point) Replace with NSF H1 high-temp chain lubricant

Casi di studio di clienti australiani

Steve H. — Sydney, NSW ★★★★★
Engineering Manager, Industrial Bakery · April 2025
“We replaced our tunnel oven band drive sprockets with Ever-power ANSI #80 plain-bore units. Running at 240°C with NSF H1 high-temp lubricant, we are now at 16 months without tooth wear issues. Previously replacing every 8–10 months. The hardness makes all the difference at oven temperatures.”
Cathy M. — Melbourne, VIC ★★★★★
Frank B. — Adelaide, SA ★★★★★
Plant Manager, Commercial Bakery · March 2025
“Our moulder conveyor sprockets were wearing out every 6 weeks in the flour-dust environment. Ever-power’s induction-hardened ANSI #40 replacement sprockets have now been running for 5 months with minimal wear. An outstanding improvement in a difficult application.”

Domande frequenti

► Can carbon-steel sprockets be used in a tunnel oven chain drive?
Yes. C45 carbon steel with induction hardening (HRC 50–60) is appropriate for tunnel oven chain drives operating at 180–280°C. The critical requirements are: (1) no zinc or cadmium coating (which emit fumes above 400°C), (2) plain or heat-resistant surface finish only, and (3) use of NSF H1 high-temperature chain lubricant rated to above the oven operating temperature.
► Is SS304 stainless steel suitable for tunnel oven temperatures?
SS304 maintains good corrosion resistance up to +800°C and structural integrity for food-handling service up to +400°C — well above typical tunnel oven temperatures of 180–280°C. For bakeries with a hygiene requirement in the oven zone (open-product bakeries), SS304 is the preferred material at oven temperatures.
► What chain lubricant is required for tunnel oven drives?
NSF H1 certified high-temperature chain lubricant is mandatory for all oven-zone chain drives where there is any possibility of lubricant contacting bakery products. The lubricant must be rated to the oven operating temperature (typically 300°C rated minimum). Standard mineral chain oil is not suitable — it carbonises and breaks down above 150°C.
► How do I prevent flour abrasion on moulder conveyor sprockets?
Use induction-hardened C45 sprockets (HRC 52–60) rather than unhardened or soft-steel sprockets. Apply dry-film PTFE or minimal drip-oil lubrication to reduce friction without creating flour-accumulating oil films. Replace chain and sprocket as a matched set when wear is detected.
► What is the correct operating temperature range for my bakery chain drive?
Ambient dough-processing zone (moulder, divider): −5°C to +30°C. Proofer: +30°C to +50°C with high humidity. Oven entry/exit: +50°C to +100°C. Oven interior: +150°C to +280°C. Spiral cooler: ambient to +30°C. Each zone has different lubrication and material requirements.
► Can I use the same sprocket for proofer and oven chain drives?
No. Proofer drives require corrosion-resistant material (SS304) due to the high-humidity environment. Oven drives require heat-tolerant material and lubricant. While SS304 can handle oven temperatures, the lubricant and chain specifications are completely different — treat each zone as a separate drive specification.
► What documentation is required for bakery sprockets under SQF or BRC certification?
SQF Level 2 and BRC Issue 8 food safety certification schemes require that maintenance materials (including machine components) used in food-contact or product-adjacent areas have material declarations confirming food-safe composition. For sprockets in these zones, we supply EN 10204 2.2 material test certificates and can provide additional food-safety compliance declarations on request.
► Do you supply sprockets for spiral coolers?
Yes. Spiral cooler chain drives typically use ANSI #60 or ISO 12B sprockets. The product-adjacent zone of a spiral cooler requires SS304 stainless for corrosion resistance. We supply these in standard stock tooth counts and finished bore to your shaft specification.
► How do I know when an oven chain drive sprocket needs replacing?
Inspect during planned maintenance shutdowns: look for hook-tooth wear pattern (tooth tip curving in direction of chain travel), cracked or broken teeth, or significant tooth height loss (>15%). In oven drives, chain elongation measurement is the leading indicator — replace chain and sprocket together when elongation exceeds 2%.
► Can you supply a complete oven chain drive set for a tunnel oven refurbishment?
Yes. We supply complete oven drive sets including head drive and tail sprockets and matching oven chain for tunnel oven refurbishment projects. Provide the chain pitch, tooth count, shaft diameters, and oven operating temperature and we will quote a complete set with appropriate material and lubricant specifications.

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