The Nachi-Fujikoshi Group's slogan, “Challenging growth in business to fulfill aspirations as a manufacturing company,” embodies our long-term vision. We are contributing to expansion in the world of manufacturing by capitalizing on our abilities. As a comprehensive machine manufacturer, we have the multifaceted operations and technologies to provide a wide range of solutions to customers in fields such as automotive, industrial machinery, energy, and infrastructure.
Bearings
Nachi-Fujikoshi bearings business started out by using the superior materials made by the company and by applying expertise in cutting and heat treatment acquired from our experience with cutting-tool manufacture. As a result, you get high speed and high precision in bearings that are durable and compact. Benefiting from our continually advancing technology, these parts are at work in automobiles, industrial machinery, and equipment in various other sectors. Everywhere, Nachi-Fujikoshi bearings contribute to better reliability.
1：New Products
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TAB series ball screw support bearings with seals Seal is integrated into a ball screw support bearing with great axial rigidity. Maintenance free because high performance grease is pre-filled (Prevents entry of foreign substance from outside.) Preset preload for easy installation onto the machine. Contact and non-contact seals are available. Universal flush ground bearings are also available. |
Spherical roller bearings The spherical raceway of outer rings are manufactured and assembled focusing to the center of bearings. Barrel type rollers and cages are assembled with inner rings. NACHI Spherical Roller Bearings are suitable for high axial , impulse and heavy load applications such as paper manufacturing, rolling and other large size machineries. |
2:Radial Ball Bearings
Deep Groove ball bearings are the most popular of all the ball bearing types because they are available in a wide variety of seal, shield and snap-ring arrangements.
The bearing ring grooves are circular arcs made slightly larger than the radius of the ball. The balls make point contact with the raceways (elliptical contact when loaded). The inner ring shoulders are of equal height (as the outer ring shoulders).
Deep Groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearing type can be produced to provide both high-running accuracy and high-speed operation.
Single-row Angular Contact Ball Bearings
The raceways of both the inner and outer rings of this bearing type are made with a set contact angle.
Single-row Angular Contact ball bearings can sustain radial, axial or composite loads, however, any axial load must be in one direction.
Larger contact angle type has better axial load capability.
Small contact angle type has higher permissible speed capability.
This bearing type is generally used in adjacent positions.
Combination Angular Contact Ball Bearings
Normally Single Row Angular Contact Ball Bearings are used as a combination of two or more bearings.
Three types of combinations are available;
1) DB, back to back
2) DF, face to face
3) DT, tandem
Clearance of matched set are adjusted before shipment, care should be taken to prevent mixing of parts from other sets.
High precision paired combination Angular Contact Ball Bearings (JIS/ISO class 5 or higher) are used for applications such as machine tool spindles and are usually preloaded.
Double-row Angular Contact Ball Bearings
The construction of this ball bearing is similar to mounting two single row angular ball bearings back to back(DB).
Capacities of double row ball bearing is less than single row since few balls can be inserted per row.
This bearing type can sustain radial, moment and bi-directional axial loads.
Self-aligning Ball Bearings
This type is constructed with the inner ring and ball assembly contained within an outer ring which has a spherical raceway for self aligning.
Self-aligning Ball Bearings are particularly suitable for applications where misalignment occurs from errors in mounting or from shaft deflection.
3:Radial Roller Bearings
Cylindrical Roller Bearings
Large radial load capacity.
Suitable for high-speed applications. Low friction between rollers and flanges.
Double - row Cylindrical Roller Bearings
Larger load capacity than single-row cylindrical roller bearings.
Used for machine tool spindles etc.
Tapered Roller Bearings
A single-row Tapered roller bearing can support a combined radial and axial load.
Used as a combination or a double-row.
Double-row Tapered Roller Bearings
Two single-row cups end one double cone; one double cup and two single-row cones.
Spherical Roller Bearings
The spherical raceway of outer rings are manufactured and assembled focusing to the center of bearings.
Barrel type rollers and cages are assembled with inner rings.
NACHI Spherical Roller Bearings are suitable for high axial , impulse and heavy load applications such as paper manufacturing, rolling and other large size machineries.
4:Thrust Ball Bearings
Single Direction Thrust Ball Bearings
Thrust ball bearings are designed to handle axial loads only.
Thrust ball bearings consist of ball, retainer and both shaft and housing washers which contain grooves for the ball.
The double Direction Thrust ball bearings can support bi-directional loads.
Thrust ball bearings are designed to handle axial loads only.
Thrust ball bearings consist of ball, retainer and both shaft and housing washers which contain grooves for the ball.
The double Direction Thrust ball bearings can support bi-directional loads.
Double-direction Thrust Ball Bearings
Carrying axial loads in both directions.
This Bearing consists of 3 kinds of grooved washer bearing rings, 2 kinds of cage and ball assembly.
Aligning seat washers with an aligning surface radius are also available for ease of design and mounting against a flat housing shoulder.
Double-direction Thrust Angular Contact Ball Bearings TAD series
Double-direction Thrust Bearing used in machine tool spindle. High contact angles carry high axial loads.
5:Thrust Roller Bearings
Spherical Roller Thrust Bearings
The raceway of housing washer of this bearing type is spherical with the center of the radius located on the bearing axis. The design provides self-alignment capability to the bearing. The contact angle (α) is approximately 45° enabling the bearing to support axial load and a small to moderate amount of radial load.
6:Bearing Units
Convenience and high reliability are achieved by combining ball bearing and bearing housing.
Since ball bearings for units have the same geometry as deep groove ball bearing, load rating, reliability, and other functions are equivalent to deep groove ball bearing.
7:Plummer Block Housing
Plummer Block housings easily constitute bearing units by combining them with self-aligning ball bearings or spherical roller bearings.
Accuracy, strength, and rigidity are improved by NACHI original design.