Introduction to INA Printing Machine Bearings
Introduction to INA Printing Machine Bearings
INA, a brand of the Schaeffler Group, is a globally renowned manufacturer of precision rolling bearings, linear components, and engine components. In the highly demanding world of printing machinery, INA bearings are considered a premium choice for their exceptional precision, reliability, and durability. They are engineered to meet the extreme challenges of modern printing, including high speeds, constant load variations, and the critical need for registration accuracy.
The performance of these bearings directly impacts print quality, machine uptime, and overall productivity.
Why Bearings are Critical in Printing Machinery
Printing machines (offset, digital, flexographic, gravure) are complex systems with numerous bearing points. The requirements are unique:
High Precision and Accuracy: Even micron-level bearing play can cause registration errors, blurring, or ghosting in the final print.
High Speeds: Modern presses run at thousands of cycles per hour, requiring bearings that can operate smoothly with minimal heat generation and wear.
Diverse Loads: Bearings must handle radial loads, axial loads, and combined moments, often in challenging conditions with vibrations and shock loads.
Harsh Environment: Exposure to paper dust, ink mist, solvents, and washing chemicals demands excellent sealing and corrosion resistance.
Minimal Maintenance: Bearings are often installed in hard-to-reach places, necessitating long service life and lubricated-for-life designs.
Key Types of INA Bearings Used in Printing Machines
INA offers a specialized portfolio for printing applications. The most common types include:
1. Cam Followers and Stud-Type Roller Followers
These are arguably the most iconic INA bearings in printing machinery. They are designed to run on cam surfaces to convert rotary motion into precise linear motion.
Application: Used in sheet transfer systems, gripper bars, and timing mechanisms.
Key Features: Thick outer ring, crowned outer diameter to prevent edge loading, and various stud and yoke designs. They are available with needle or cylindrical roller designs for high load capacity and sealed versions to prevent contamination.
2. Precision Ball Bearings
These are used in high-speed, high-precision spindles and rollers.
Application: Main drive shafts, ink and dampening form rollers, and impression cylinders.
Key Features: Extremely high running accuracy (P5, P4, or even higher classes), low noise and vibration levels, and options with ceramic balls for even higher speeds and reduced electrical arcing.
3. Needle Roller Bearings
Ideal for applications where space is extremely limited but high load-carrying capacity is required.
Application: Gear pumps, linkages, and oscillating rollers within the inking unit.
Key Features: Very small cross-section relative to their load capacity. Available as drawn cup, full complement, or cage-guided units.
4. Linear Bearings and Guides
For applications requiring precise straight-line movement.
Application: Scanner heads in CTP (Computer-to-Plate) machines, automated adjustment systems, and loader/unloader systems.
Key Features: High rigidity, smooth motion, and excellent accuracy. INA offers a range of linear ball bearings, guide carriages, and profile rail systems.
5. Slewing Ring Bearings
Used for rotational movement in large, heavy assemblies.
Application: The plate and blanket cylinders on large web offset presses.
Key Features: Can handle combined loads (radial, axial, and moment) in a single, compact unit, simplifying machine design.
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F82868 F84003 F84228 F84338 F84656
F84874 F84701 F84992 F85017 F85265
F85815 F85378.1 F87054 F87244 F87259
F87486 F87588.1 F87651 F87762 F87934
F88039 F88404 F88480 F88545 F88816.2
F89034 F89647 3 F90193 F90308.2 F90309
F90525 F90750 F90823 F90836.1A F91449
F91662 F91680 F91916 F91943 F92082.1
F92214.3 F92560 F92591 F92625 F92724
F92786.1 F92889 F93487 F93554 F93666.2
F94632 F93683 F93684 F93687 F94251.2
F94376 F94377 F94440 F94488 F94490
F94974-10 F95109.2 F95117.2 F95315
F95451.2 F96003 FC65354 FC66217 FC66263
FC68828 FC65478 FC67148.2 F203535K
F205070 F208939.03 F209086 F212985 F220469
F222027.05 F223869.05 F225538 F227348 F227897
F233298 F235208 F349137 F83852 F86755 F88153.1
F89754.3 FC68336
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