What is the minimum order quantity (MOQ)?

Stock models can be supplied in small quantities, and non-standard bearings can be custom-made even in small batches. Send us the model number or drawing and we will confirm the MOQ with your quotation.

Can you supply bearings under our own brand?

Yes. NKEN offers full OEM service: your brand laser-marked on the bearing rings, custom colour boxes and labels, so the goods arrive ready for your shelf.

Do you provide free samples?

Yes, free samples are available for most catalogue models so you can test quality and fit before placing a bulk order.

Which countries do you export to?

NKEN bearings are exported to more than 73 countries, with sea and air shipping options and export packing as standard.

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Slewing ring bearing with external gear teeth for excavators, cranes and wind equipment

Slewing Bearings — Ball & Roller Rings, Geared or Gearless

Q: What information do you need to quote?

The bearing model number (or the brand cross-reference number you currently buy), quantity, delivery destination, and any special requirements such as clearance, seals or branding. A drawing is enough for non-standard parts.

NKEN manufactures slewing bearings (slewing rings) in four designs — single-row four-point contact ball, double-row ball, crossed roller and three-row roller — with external gear, internal gear or no gear, for excavators, truck and tower cranes, wind turbines, port machinery, turntables and solar trackers. One ring replaces a whole bearing arrangement: it carries axial, radial and tilting-moment loads together and bolts directly to the structure.

Slewing bearings are engineered per application, so instead of a size table we list the design programme below. Send the drawing, or the key data — outside diameter, bolt pattern, gear module/teeth if geared, and the loads — and our engineers will specify the ring and quote it.

Four designs: four-point ball, double-row ball, crossed roller, three-row roller
External gear, internal gear or ungeared; seals and grease nipples fitted
Raceway induction hardening; gear teeth hardened on request
Made to drawing — bolt pattern, clearance and preload per application
Single-piece supply for OEMs and replacement rings for excavator/crane fleets

Designs	Four-point contact ball · double-row ball · crossed roller · three-row roller
Gear	External, internal, or none
Material	42CrMo / 50Mn forged rings, induction-hardened raceways
Supply	To drawing or sample; replacement rings matched to machine model
Applications	Excavators, cranes, wind, port machinery, turntables, solar trackers

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Slewing Bearings — models, dimensions & cross-reference

Design	Rolling elements	Gear options	Typical applications
Single-row four-point contact	Balls, one row	External / internal / none	Small excavators, turntables, welding positioners
Double-row ball	Balls, two rows	External / internal / none	Truck cranes, aerial platforms, stackers
Crossed roller	Cylindrical rollers, crossed	External / internal / none	Precision turntables, robots, machine tools
Three-row roller	Rollers, three rows	External / internal	Tower cranes, port cranes, large excavators, wind yaw/pitch

Slewing bearings are quoted per drawing. Minimum data for a quotation: ring OD, bolt-circle and hole count, gear type/module if any, load case (axial, radial, tilting moment) and quantity.

Applications

Mining & Heavy Industry Wind Power

Slewing Bearings — questions buyers ask

Can you make a replacement slewing ring for my excavator model?

Yes — replacement rings are matched to the machine make and model or to your drawing/sample dimensions, including bolt pattern and gear teeth. Send the machine model or the old ring dimensions.

What information do you need to quote a slewing bearing?

Outside diameter, bolt pattern, gear details (if geared), the load case and quantity. A drawing is best; our engineers confirm the design and quote from it.

Do you supply slewing bearings one piece at a time?

Yes, single-piece and small-batch supply is standard for replacement rings, alongside OEM series production.

Get a quote for Slewing Bearings

Tell us the model and quantity — we reply with price, stock status and delivery time. Free samples available for most models. Prefer to talk? WhatsApp James Ke at +86 188 9536 7568 (24/7 support).