slew ring manufacturer

Slewing bearings from the manufacturer

Ningguo SwbTec Industry Co., LTD makes the SWBTEC slewing bearing range in Ningguo, Anhui, China. A slewing bearing connects two machine structures while allowing one to rotate under axial load, radial load, and overturning moment.

The range covers ball and roller constructions, plus internal-gear, external-gear, and gearless arrangements. Published product tables show dimensions, mounting holes, and gear data for specific models. For a replacement, the mating structure and hole pattern matter alongside the nominal bearing diameter.

Choose a construction and drive layout

Start with the load case and available space, then compare rolling-element arrangements. The table describes design directions; capacity must be checked for the selected size and duty cycle.

Place the gear where the machine needs it

External teeth engage a pinion outside the bearing. Internal teeth keep the mesh inside the ring. A gearless ring leaves the drive arrangement to the surrounding mechanism. Pinion access, guarding, lubrication, and installation space all affect the choice.

Explore five SWBTEC bearing options

These product pages show available configurations and model tables. The dimensions below are examples from each linked catalog, not a universal rating for the full family.

Slewing Bearing With External Gear

External teeth let a pinion drive the bearing from outside the ring. This catalog design combines the gear with an internal mounting flange for compact machinery layouts.

• Catalog modelSW-414W.20
• Outside diameter D504 mm
• Overall height H56 mm
• Gear module5

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Double Row Ball Slewing Bearing

Two ball rows provide a larger bearing arrangement for applications that need greater load capacity than a comparable single-row design. Confirm the mounting envelope and load case against a specific model.

• Catalog modelSW-476.25
• Outside diameter D565 mm
• Overall height H98 mm

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Single Row Ball Slewing Bearing

A compact single-row ball construction for combined axial, radial, and overturning loads. The catalog covers internal-gear, external-gear, and gearless versions.

• Reference designation315.20
• Rolling elementsSingle row of balls
• Gear optionsInternal, external, or none

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Three Row Roller Slewing Bearing

Three rows of rollers separate the major load directions, making this construction a candidate for larger machines with substantial axial, radial, and overturning loads.

• Catalog model130.25.500
• Outside diameter D634 mm
• Overall height H148 mm

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Slewing Bearing With Internal Gear

Internal teeth move the pinion mesh inside the ring, which can help package the drive within the available machine envelope. The listed design uses an external mounting flange.

• Catalog modelSW-414N.20
• Outside diameter D518 mm
• Overall height H56 mm
• Gear module5

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Specify the load case before choosing a size

Bearing diameter alone cannot establish whether a slew ring fits the machine. Provide the maximum and typical axial and radial loads, overturning moment, rotation speed, duty cycle, shock events, and expected service life. These inputs guide construction choice and model-specific capacity checks.

The mating parts are equally important. Share the available outside and inside diameters, overall height, mounting-hole pattern, bolt details, and support-structure drawing. A flat, rigid mounting face and even bolt preload help distribute load through the raceways.

For a driven ring, specify whether the pinion engages internal or external teeth, the gear geometry, and the available pinion location. Describe dust, water, temperature, and lubrication access so sealing and maintenance requirements can be addressed in the design review.

Manufacturing steps and inspection points

SWBTEC inspects incoming forgings for visible defects and dimensions, rough-machines the rings, and uses ultrasonic inspection after rough turning to check for internal discontinuities. Raceway machining precedes induction hardening; the production materials specify a raceway hardening requirement of HRC 55–62 for applicable products.

Gear cutting, drilling, and finish machining follow the drawing and bearing configuration. After cleaning and assembly, rotation is checked for smooth movement and abnormal sound. Final records can cover overall height, clearances, ring runout, raceway hardness, mounting-hole dimensions, and gear measurements when the bearing has teeth.

Ask for the inspection items tied to the model and serial number in your purchase specification. One recorded result applies to the inspected bearing, so it should be reviewed with that unit’s drawing and acceptance limits.

Send a drawing for a useful quote

For a new design, send the machine application, load case, space envelope, desired rolling-element and gear arrangement, annual quantity, and delivery destination. Include a drawing if the bearing must fit an existing structure.

For a replacement, add the original part number, overall and bore dimensions, bolt-circle and hole details, gear data, photos, and any failure observations. These details help distinguish a direct dimensional match from a redesign.

Price and lead time depend on diameter, bearing construction, gear machining, accuracy requirements, quantity, and any drawing changes. Request a model-specific quote that states the selected design, drawing revision, inspection documents, packing, and delivery terms.