Slewing ring bearings, from single-row ball to triple-roller
Designed in the U.S., built to U.S. standards and supported by in-house engineers. 1093 SlewPro designs on file, 834 of them crossed to 33 other brands including Rotek, Kaydon, SKF, Rothe Erde and Rollix. New designs are added often.
Most of our slewing rings are designed for one customer’s machine. Tell us the loads and space and our engineers will design yours, with no engineering charge.
Six series for every load and envelope
21 Series
"L"-design four-point contact ball bearing, built to save weight
Raceway 13–57 in · 235 part numbers on file
View series →30 Series
Four-point contact ball bearing with high stiffness
Raceway 10–180 in · 696 part numbers on file
View series →40 Series
Double-row ball bearing with low starting torque
Raceway 12–180 in · 6 part numbers on file
View series →45 Series
Eight-point contact double-row ball bearing: big loads, small footprint
Raceway 18–170 in · 10 part numbers on file
View series →50 Series
Cross-roller bearing with high dynamic capacity
Raceway 10–180 in · 80 part numbers on file
View series →100 Series
Triple-roller bearing with our highest capacity
Raceway 12–180 in · 20 part numbers on file
View series →Search by part number or size
Type a SlewPro part number, or the Rotek, Kaydon, SKF or other part you use today, or search by outside diameter, bore or raceway diameter.
| SlewPro part | Series | Gear | Raceway (mm) | OD (mm) | ID (mm) | Height (mm) | Weight (lb) | Crosses to |
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Dimensions are taken from our 3D models; confirm against the certified drawing before final design. New designs are added often, so if you don't see your size, ask. We also design custom slewing rings. Send us your requirements.
Storage, mounting, bolt torques, gear backlash, lubrication intervals and greases, inspection, and the warning signs to act on. Seven pages, checked by our manufacturing partners. It ships with every bearing.
Engineering guides
Practical articles from our engineers on specifying, installing and maintaining these parts.
Slewing Ring Crossovers Explained: Rotek, Kaydon, Rothe Erde and More
How a slewing ring crossover works, what has to match between the original and the replacement, the brands we cross most, and how to look up
Read the guide →Slewing Ring Bearings Explained: Types, Advantages and Where They Are Used
What a slewing ring bearing is, why it is used instead of other bearing types, the main designs from single-row ball to triple-roller, and h
Read the guide →Specifying a Slewing Ring Bearing: The Buyer's Checklist
What to send a slewing ring manufacturer, the design checks engineers most often miss (structure, bolts, bolt pattern, mounting surface), an
Read the guide →Slewing Ring Bearing Installation and Maintenance: A Practical Checklist
How to store, mount, bolt, check and maintain a slewing ring bearing: the steps that prevent early failure, in the order you do them.
Read the guide →Slewing Ring Bearing Lubrication: Choosing Grease, Setting Intervals and Mistakes to Avoid
Which grease to use in a slewing ring bearing, how often to relubricate, the warning signs of a lubrication problem, and the four most commo
Read the guide →Common Slewing Ring Bearing Failures: Causes, Warning Signs and Prevention
The four most common causes of slewing ring bearing failure, the warning signs that come first, and how to prevent them, or replace a failed
Read the guide →Understanding Load Calculations: How to Choose the Right Slewing Ring for Your Application
Learn how to calculate axial, radial, and moment loads to choose the right slewing ring bearing for your application. Explore SlewPro’s cust
Read the guide →Talk to an engineer
Need help selecting the right part? Our engineers will size it, cross it, and quote it — usually within 1–2 business days.
Not in the catalog? We design to your application, with no engineering charge.