High temperatures:
FT series: 150°C (300°F) peak s up to 500 000 N.Dm
HTseries: 200°C(400°F)peak s up to 150 000 N.Dm
F600/F604 series
s (not pictured)
Low temperatures:
LT series:
s down to -60°C (-75°F)
High speeds:
HV series:
s up to 700 000 N.Dm
Straightforward and immediately available, SNR's TOPLINE range is divided into 4 families of ball bearings and covers the most stringent technical applications. It thus provides:
wider selection,
simplified product management,
faster procurement.
Applications Sealed version Shielded version
Extreme temperature 200° C (390°F) to 350°C (660°F) Not available F604
-60°C -50°C -40°C -30°C -20°C -10°C0°C (-75°F) (-60°F) (-40°F) (-20°F) (-4°F) (15°F) (32°F)
Extreme conditions,
extreme controls …
Thanks to its test center with more than 100 machines, SNR has tested all the bearings of the TOPLINE range and all their components. Lubricant breakdown, responsible for 70% of premature bearing failures, is averted due to the selection of greases suited to the particular application conditions. The test programs on the TOPLINE range have focused on this critical criterion through consideration of:
physical/chemical characteristics: upper and lower operating limits, drop point, extreme pressure properties, etc.
mechanical features: stability at various temperatures, in the presence of water, high temperature capabilities, resistance at high speed and/or low torque.
proven performance under actual operating conditions. SNR has worked with the largest industrial manufacturers. A guarantee of reliability!
RECOMMENDED FITTING TOLERANCES
Shaft Steel
or cast-iron housing m6 H7 h6 M7
RECOMMENDED FITTING TOLERANCES RECOMMENDED FITTING TOLERANCES
*Note:Bearings of the HT and HT ZZseries are packed withgrease that provides the optimum temperature resistance while minimizing the reduction in speed capabilities.
RECOMMENDED FITTING TOLERANCES
Shaft Steel
or cast-iron housing m6 H7 h6 M7
*Speedindicatedforoperationwithin atemperaturerangeof-20 to+80°C(-4 to+175°F)
RECOMMENDED FITTING TOLERANCES
Aggressive environments require extreme solutions.
These radial contact ball bearings have the following features and benefits:
• Large radial clearance. Clearance is sufficient to compensate for differential thermal expansion between the inner and outer rings of the bearing and/or surrounding parts.
• Heat treatment with stabilization temper. Beyond 230° to 250°F, steel undergoes a structural change resulting in an increase of its specific volume. To limit this phenomenon, F600 bearings are subject to a special hightemperature temper.
• Pressed steel cage.
• Recessed markings on both rings. Marking maintains proper identification of bearings at all times regardless of operating conditions.
Bearing type selection and instructions for use
F600: Standard Type
Open with a black finish, the F600 benefits from a special surface treatment over the entire bearing. This surface treatment gives the bearing better resistance to corrosion while acting as a dry lubricant where speed and loads are not as severe.
F604: Greased/Shielded Type
Suited for heavily contaminated environments, this bearing is prelubricated with a hightemperature grease and protected by two builtin shields.
F605: Special Type for Limestone
This open bearing is designed for use in limestone kilns or similar applications. It is heat stabilized for temperatures up to 660°F, but comes with no surface treatment. PTFE type lubricant is recommended for filling the empty housing space. The special treatment of the F600 series can be applied to other sizes and types of bearings (e.g. spherical roller bearings). Contact your NTN representative for additional details.
*Load recommended at speed lower than 50rpm
RECOMMENDED FITTING TOLERANCES
U.S. Headquarters:
1600 East Bishop Court Mt. Prospect, IL 60056-7604 Tel: (847) 298-7500 Fax: (847) 699-9744 1-800-323-2358
Regional Sales Offices:
Mount Prospect, IL | Exton, PA | Norcross, GA | Omaha, NE | Shelbyville, KY | Louisville, OH
TN21 USA PRINTED IN USA 04/2011