Paper Mills: Wet, Hot, and Continuous
Paper machine bearings operate in one of the harshest industrial environments: high humidity, elevated temperatures (120–180°C in dryer sections), continuous 24/7 production, and large shaft diameters that demand robust bearing designs. A single bearing failure can shut down an entire paper machine line.
Typical Operating Conditions
- Temperature: 60–180°C (dryer sections)
- Humidity: Near 100% in wet-end sections
- Speed: 100–2500 m/min paper speed
- Shaft size: 100mm–500mm+ diameter
- Duty cycle: Continuous, 8500 hours/year
Recommended Bearing Solutions
Dryer Sections
E1 Series Spherical Roller Bearings in 23100 or 23200 series with C4 clearance. The high-temperature environment demands C4 clearance to accommodate shaft expansion. E1 design's lower friction helps reduce operating temperature in already-hot dryer bearings.
For dryer section RFQs, use the dryer roll bearing route to prepare roll position, shaft size, temperature, lubrication, quantity, and shutdown window details.
Common sizes: 22314CAK, 22316CAK, 22320CAK through 22330CAK.
Press Rolls
Standard Spherical Roller Bearings (22300 or 23100 series) with sealed configurations where water ingress is a concern. Tapered bore with hydraulic mounting for the large interference fits required on press roll shafts.
Calendar Stacks
Cylindrical Roller Bearings (NU/NJ series) combined with spherical roller bearings for the locating/non-locating arrangement typical in calendar stacks. High precision and low runout are critical for paper surface quality.
Performance Results
- Reliable operation in high-humidity, high-temperature conditions
- Reduced risk of unscheduled paper machine downtime
- Extended service life through correct clearance and lubrication selection
Related Paper Machine Routes
RFQ Details Buyers Should Send
Send the equipment type, bearing position, failed model, suffix, load condition, contamination level, lubrication method, quantity, destination, downtime target, and document needs for application-specific review.
| RFQ detail | Example | Why it matters |
|---|---|---|
| application equipment | crusher, vibrating screen, fan, gearbox, conveyor pulley, paper machine, or steel mill position | Application context affects load, shock, speed, contamination, lubrication, and document review. |
| bearing position | drive side, non-drive side, screen exciter, crusher pitman, fan shaft, gearbox input shaft | Bearing position helps review load direction, vibration exposure, access for lubrication, and failure risk. |
| failed model | Photo of old bearing marking, OEM manual reference, or removed bearing code | The failed model helps compare original specification, suffix, and possible replacement route. |
| full suffix / marking | K, K30, C3, C4, W33, CA, CC, MB, 2RS, or full ring marking photo | Suffixes can change bore type, clearance, cage design, lubrication groove, sealing, and replacement risk. |
| load condition | Heavy radial load, shock load, axial load, reversing load, or unknown with equipment details | Load condition affects series selection, cage preference, and whether high-capacity options should be reviewed. |
| environment | Dust, water, slurry, outdoor exposure, high humidity, cement dust, paper mill moisture | Environment affects sealing, grease, corrosion risk, packing, and maintenance interval review. |
| lubrication method | Grease gun, centralized lubrication, oil bath, oil circulation, W33 groove, or sealed bearing | Lubrication method affects suffix review, housing compatibility, contamination control, and relubrication planning. |
| quantity | 1 large bearing, 2 pcs for maintenance, 50 pcs distributor stock, or annual demand | Quantity affects quote route, packing, production planning, inspection scope, and freight review. |
| destination | Destination country, port, warehouse, distributor address, or project site region | Destination affects export documents, packing method, shipping route, and trade-term review. |
| target timing | Maintenance shutdown date, urgent repair, trial order timing, or normal replenishment schedule | Timing helps separate availability review, production planning, sample validation, and consolidated shipment options. |
| required documents | Inspection report, material certificate, COO, RoHS / REACH statement, packing photos, buyer template | Document requirements must be confirmed before quotation because scope depends on order route and buyer template. |
Request Paper Mill Equipment Bearing RFQ Review
Send us your equipment specifications and operating conditions. TFL Bearing can review application fit, model risk, current availability, production routes, replacement review boundaries, and document needs before quotation.