Aktiebolaget Skf

Aktiegolaget Skf

Andrea A Bertolini

Fausto Baracca

Pasquale Frezza

Fabio Cavacece

Fabio Falaschi

Alessio Nebbia Colomba

Ettore Bertelloni

Antonino Calderone

Giacomo Conti

Vittorio Zanella

Maria Grazia Semeraro

Renato Berti

A bearing unit with rolling bodies for use in the food and beverage industry, for example, is disclosed herein. The example embodiments disclosed herein provide that of a bearing unit comprising a radially inner ring including a stainless steel collar with a raceway, on which two sleeves made of reinforced polymeric material are co-molded on opposite sides. Such example embodiments incorporate corrosion resistance properties of a polymeric material without losing the surface hardness properties. As such, the radially inner ring of the bearing unit offers same nominal load values as inner rings are made entirely of metal, but with better corrosion resistance without losing the surface hardness properties.

Bearing unit with rolling bodies with a co-molded inner ring

A bearing unit includes a radially outer ring, a radially inner ring, and a sealing device. The inner ring includes a first radially outer surface formed, a second radially outer surface adjacent to the first, and a radial step connecting the radially outer surfaces. The sealing device includes a shaped shield mounted on the outer ring and an elastomer lining the shaped shield. The elastomer lining includes at least three radial contacting lips. A first, axially outer most radial contacting lip is in sliding contact with the first radially outer surface of the inner ring, a second, axially inner most radial contacting lip is in sliding contact with the second radially outer surface of the inner ring, and a third radial contacting lip positioned between the first and second radial contacting lips and in sliding contact with the second radially outer surface of the inner ring.

Bearing unit for rotary shafts

A bearing unit includes a radially outer ring having seats formed in a radially inner surface thereof, a radially inner ring, a row of rolling bodies, and at least one sealing device interposed between the rings. Each sealing device includes a shaped shield, an elastomer coating overmolded on the shaped shield, and an anchorage formed on the elastomer coating. The anchorage includes a radially external anchoring lip received by the seat of the radially outer ring that includes a root portion and a projection distal to the root portion. The anchorage also includes an annular cavity formed on a radially internal side thereof, where an axial length of the annular cavity is greater than an axial length of the projection and the anchoring lip is flexed radially inward and at least partially fills the annular cavity.

Bearing unit with rolling bodies

A bearing unit () has a radially outer ring (), a radially inner ring (), an eccentric locking collar (), a row of rolling bodies (), and a sealing device (). The sealing device () is arranged on the same side as the locking collar () and is interposed between the radially inner ring (), the radially outer ring () and the locking collar (). The sealing device () includes a metal shield () stably connected to the radially outer ring (), and an elastomeric component () co-molded on the shield () in a radially inward direction. The elastomeric component () has a plurality of lips, of which at least one lip () is in contact with the locking collar ().

Bearing unit

A bearing unit is disclosed, which includes a new labyrinth sealing device designed for use in the ventilation industry that prevents entry of contaminants therein. The sealing device according to the present disclosure provides a 'contactless' sealing device, i.e. one without contacting elements (for example elastomer lips); and a bearing unit with a low frictional torque, due only to the internal geometry and the efficiency of the lubricant, but certainly without any contribution from the sealing devices. The sealing devices comprises a plurality of shields, and wherein the combination and structural orientation of these shields creates a long, narrow labyrinth L with many changes in direction, and therefore a path for external contaminants with significant head loss. Consequently, any contaminants that make into the bearing unit, passing through the entire labyrinth L, will be negligible.

A support assembly for a moveable, rotating, or sliding shaft includes a casing and a cover. The casing includes a front edge defining an opening and a radially external lateral surface having an annular seat. The annular seat includes an annular groove axially spaced from the front edge and connected to a number of axial grooves that interrupt at least part of the front edge. The cover includes an annular coupling portion extending toward the radially external lateral surface of the casing. The annular coupling includes at least one pair of teeth formed on a radially inside surface of the annular coupling portion and projecting radially inward, each pair of teeth spaced circumferentially from each other, and a plurality of radially internal projections. A bottom wall of the annular groove includes a plurality of depressions alternating with a plurality of projections.

Support assembly for food applications having an improved seal

A bearing unit for a marble cutting machine, comprising a radially outer ring, rotatable about an axis of rotation (X) of the bearing unit and provided with a radially outer flange portion; a stationary radially inner ring having a raceway and a through hole; a row of rolling bodies interposed between the radially outer ring and the radially inner ring; a seat formed in the radially inner ring and shaped as a portion of a circular crown; and a sensor fit in the seat, wherein a ratio between an internal diameter (D) of the through hole and an axial thickness (t) of the radially inner ring is between 6.7 and 11.1.

Bearing unit with sensorized inner ring

A bearing unit with rolling bodies for use in the food and beverage industry, for example. The bearing unit may have a high resistance to wear and to corrosion and may have a radially outer ring, stationary, a radially inner ring, rotatable with respect to an axis of rotation (X), and a sealing and protection device mounted on the radially inner ring and on opposite sides of the radially outer ring, both to protect the radially outer ring from the action of external contaminants and to prevent any such external contaminants from getting into a gap between the radially outer ring and the radially inner ring. The bearing unit may further have protective layer being arranged in contact with the radially inner ring, and being made of composite polymeric material to isolate and protect the radially inner ring from external contaminants.

Bearing unit with rolling bodies for use in the food and beverage industry

A support assembly for moving shafts, comprising a bearing unit positioned in a casing, and a cover for fluid sealing the casing. The support assembly comprises double level of protection provided by two distinct sealing devices that keep the bearing unit protected from washing liquid even in the most demanding conditions of use. The better sealing configuration aids in overall better sealing of the bearing unit; greater resistance to contaminants; and improving the sealing performance of the whole support assembly.

Support assembly for food applications

A bearing unit for a marble cutting machine has a radially outer ring, rotatable with respect to an axis of rotation (X) and is provided with a radially outer flange portion. Additionally, the bearing unit is provided with a stationary radially inner ring with a through hole in which the ratio between a dimension of an internal diameter (D) of the through hole and a dimension of the axial thickness (T) of the radially inner ring is between about 6.7 and about 11.1. A row of rolling bodies is interposed between the radially outer ring and the radially inner ring. A sealing shield is made of composite material and interposed between the radially inner ring and the radially outer ring, rotatable with respect to the rotation axis (X) and steadily anchored to the radially outer ring. The shield is provided with a sensor molded in it.

Bearing unit with sensorized shield

A bearing unit may have a radially outer ring, a radially inner ring, a row of rolling bodies interposed between the radially outer ring and the radially inner ring, a casing inside which the rings of the bearing unit are housed. The bearing unit may further have a sealing device and a disc-like element for protecting the sealing device, made as one piece, entirely of plastic or composite material, axially external with respect to the sealing device, stably anchored in a seat of the casing and having a radial distance (d2) between a radially internal surface of the disc-like element and the radially inner ring ranging between 0.75 mm and 0.95 mm so as to block large-size external contaminants, without making contact with the radially inner ring.

Bearing unit with protection disc

A sealing device for a sleeve of washing machines, comprising a first, stationary, annular screen, and a second, rotatable, annular screen. The first annular screen includes a first cylindrical mounting portion and a first flange portion; and the second annular screen includes a second cylindrical mounting portion and a second flange portion. The sealing device is characterized in that both the first and the second annular screens include the same number of non-contacting sealing lips, which are similar to each other and contained axially between the first and second flange portions, in radially alternating positions axially arranged one above the other, so as to define a sealing labyrinth (L). The first and second annular screens define between them a discharge chamber (C) and an obstruction chamber (C) which are arranged along the sealing labyrinth (L), substantially at opposite ends of the said sealing labyrinth (L).

Sealing device for washing machine sleeves

A bearing unit having a stationary radially outer ring, a radially inner ring rotatable about a central rotation axis (X) of the bearing unit is provided with at least one raceway and, in an end portion thereof, with at least two circular sector segments, at least one row of rolling elements interposed between the radially outer ring and the radially inner ring, and a concentric collar for clamping the radially inner ring on a rotating shaft, where an induction-hardening heat treatment is applied to a portion of the radially inner ring that overlaps with at least a portion of the at least one raceway.

Bearing unit with concentric clamping collar

A bearing unit comprising a stationary radially outer ring with a spherical radially outer surface with a convex shape; a radially inner ring that is rotary about a central rotation axis of the bearing unit and is mounted on a rotating or oscillating shaft in which a diametrical through-hole formed in a first cylindrical portion is used to receive an elastic element for locking the radially inner ring on the shaft; a plurality of rolling bodies interposed between the radially outer ring and the radially inner ring to enable the relative rotation of the two rings; and at least one element for locking the radially inner ring on the shaft in which a pair of threaded through-holes formed in either the first cylindrical portion or the second cylindrical portion of the radially inner ring is used to receive respective grub screws for locking the radially inner ring on the shaft.

Bearing unit for windrowers

Casing of a bearing unit for food applications, made of polymeric material and provided internally with a spherical seat for housing the bearing unit, the casing having a reinforcement in the form of a metal ring co-molded inside the casing and accommodated around the spherical seat of the casing.

Growing community of inventors

Carrara, Italy

Andrea A Bertolini