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- FUN 20 Series
- FUN 32 Series
- Solid Section
- SUN 20 Series
- SUN 25 Series
- SUN X14 Crossed Roller Series
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- FEG 20 Series
- FEG 32 Series
- Solid Section
- SEG 20 Series
- SEG 25 Series
- SEG X14 Crossed Roller Series
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- FIG 20 Series
- FIG 32 Series
- Solid Section
- SIG 20 Series
- SIG 25 Series
- SIG X14 Crossed Roller Series
Product Catalogue
Find Out More
Product Catalogue
Find Out More
- Flanged
- FUN 20 Series
- FUN 32 Series
- Solid Section
- SUN 20 Series
- SUN 25 Series
- SUN X14 Crossed Roller Series
- Flanged
- FEG 20 Series
- FEG 32 Series
- Solid Section
- SEG 20 Series
- SEG 25 Series
- SEG X14 Crossed Roller Series
- Flanged
- FIG 20 Series
- FIG 32 Series
- Solid Section
- SIG 20 Series
- SIG 25 Series
- SIG X14 Crossed Roller Series
FEG 20 Imperial Series
A flange profile inner and geared outer ring separated by a 3/4″ ball set; a constant section height of 2.025″ and a standard range of external diameters ranging from 19.9″ to 46.87″ matching American dimensions, gearing and bolt patterns.
Compared with traditional combination bearing and gearing systems, slewing rings provide a sealed bearing to accommodate axial, radial and moment loads while simultaneously providing a gear for power trasmission as well as bolt holes for fixation.
Key Features
- A reduction in the number of design elements
- Less component machining
- Quick and easy assembly of machinery
- Weight savings
Our engineers design, manufacture, and supply components to your exact specification. Contact us to discuss your project.
A flange profile inner and geared outer ring separated by a 3/4″ ball set; a constant section height of 2.025″ and a standard range of external diameters ranging from 19.9″ to 46.87″ matching American dimensions, gearing and bolt patterns
All QCB® slewing rings are manufactured to the highest possible quality levels in ISO-certified factories.
A QCB® quality standard defines all aspects of their dimensions and tolerances as well as all aspects of manufacturing, from material properties and all stages of production to packing and labelling.
While a flange reduces the overall weight of the bearing, it also reduces its torsional rigidity, and these bearings are thus best suited to light- or medium-duty applications where there is not a high load eccentricity.
If the Imperial sizes and bolt patterns are not quite right, consider the FEG20 Metric Series
What are the Typical Uses for Slewing Rings?
- Cranes and crane handling systems
- Man lifts and access platforms
- Bottling and packing line carousels
- Robotics and positioning systems
- Solar tracking systems
- Wind turbines
- Winches
- Water treatment plants
- Machine tools
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| QCB reference | Outline dimensions & weight | |||||||
| Da | Di | U | C | D | Load curve | Weight | ||
| in | in | in | in | in | lbs | |||
| FEG 506 20 61 AA LM | 19.900 | 11.970 | 16.220 | 16.140 | 14.490 | 1 | 72 | |
| FEG 639 20 61 AA LM | 25.150 | 17.090 | 21.340 | 21.260 | 19.610 | 2 | 96 | |
| FEG 740 20 61 AA LM | 29.150 | 21.030 | 25.280 | 25.200 | 23.550 | 3 | 115 | |
| FEG 836 20 61 AA LM | 32.900 | 24.970 | 29.220 | 29.140 | 27.490 | 4 | 128 | |
| FEG 945 20 61 AA LM | 37.200 | 28.900 | 33.150 | 33.070 | 31.420 | 5 | 152 | |
| FEG 1047 20 61 AA LM | 41.200 | 32.840 | 37.090 | 37.010 | 35.360 | 6 | 172 | |
| FEG 1190 20 61 AA LM | 46.867 | 38.750 | 43.000 | 42.920 | 41.270 | 7 | 189 | |
| QCB reference | Outer holes | Inner holes | 20o spur gear | |||||
| La | na | Li | ni | P | DP | z | Fz MAX | |
| in | lb.f | |||||||
| FEG 506 20 61 AA LM | 18.000 | 8 | 13.130 | 12 | 19.500 | 4 | 78 | 7095 |
| FEG 639 20 61 AA LM | 23.250 | 12 | 18.130 | 15 | 24.750 | 4 | 99 | 7095 |
| FEG 740 20 61 AA LM | 27.250 | 15 | 22.130 | 18 | 28.750 | 4 | 115 | 7095 |
| FEG 836 20 61 AA LM | 31.000 | 18 | 26.130 | 18 | 32.500 | 4 | 130 | 7095 |
| FEG 945 20 61 AA LM | 35.000 | 18 | 30.000 | 18 | 36.667 | 3 | 110 | 9450 |
| FEG 1047 20 61 AA LM | 38.880 | 18 | 34.000 | 20 | 40.667 | 3 | 122 | 9450 |
| FEG 1190 20 61 AA LM | 44.630 | 20 | 39.880 | 24 | 46.333 | 3 | 139 | 9450 |
| Standard grease fitting | # at least 2x 1/4″-28 UNF 2B on inner ring | |||||||
Interchange information
The FEG20 Imperial Series is interchangeable with bearings from other manufacturers such as Rotek, Kaydon, AVON, Silverthin . However there may be variations to this rule (e.g. OEM variants) and we invite you to refer to our technical staff for assistance.
| FEG 506 20 61 AA LM | RK6-16E1Z | L6-16E9Z | SK6 16 EZ | 716 MA1 | |||
| FEG 639 20 61 AA LM | RK6-22E1Z | L6-22E9Z | SK6 22 EZ | 721 MA1 | |||
| FEG 740 20 61 AA LM | RK6-25E1Z | L6-25E9Z | SK6 25 EZ | 725 MA1 | |||
| FEG 836 20 61 AA LM | RK6-29E1Z | L6-29E9Z | SK6 29 EZ | 729 MA1 | |||
| FEG 945 20 61 AA LM | RK6-33E1Z | L6-33E9Z | SK6 33 EZ | 733 MA1 | |||
| FEG 1047 20 61 AA LM | RK6-37E1Z | L6-37E9Z | SK6 37 EZ | 737 MA1 | |||
| FEG 1190 20 61 AA LM | RK6-43E1Z | L6-43E9Z | SK6 43 EZ | 742 MA1 | |||
Custom designs
- Double drilled or custom drilling patterns
- Higher precision bearings with location diameters
- Reduced internal clearance (Class 5 & Class 6)
- Black oxide (standad) or zinc plating (to order) for enhanced corrosion protection
- Epoxy paint or even Nylon coated units to special order
- Stainless steel or aluminium versions
Materials
FUN20 Imperial Series slewing rings are normally produced in 50Mn / C45.
Internal construction
Standard FEG20 Imperial Series bearings incorporate plastic spacers, but ball spacers, steel or brass spacers, or even full complement and caged designs can be supplied for specific applications.
Seals
A land riding NBR (nitrile rubber) seal strip is standard. VITON seals can be supplied to order.
Gearing
The FEG20 Imperial series has a standard 20° pressure angle, uncorrected spur gear cut into the outer ring.
Lubrication
QCB® Slewing rings are assembled with a small quantity of Lithium EP2 grease. It is important that all slewing rings are greased during installation and prior to operation. FEG20 Imperial series slewing rings will usually have 4 or 6 grease nipples DIN 71412 M8x1 on the radial face of each ring. Sufficient grease nipples for all holes as well as Nylon plugs (to insert if a grease nipple is not required) are supplied with each ring.
Special greases can be supplied on demand as can GreaseMax Automatic Lubricators and Accessories.
Load & Bolt limit curves
If both a radial and an axial load act on the bearing these must be combines into a single equivalent load to enable basic selection from the load curves. The raceway limit is illustrated by the blue line, the red line illustrates the limit for the specified number of Grade 10.9 bolts. The load point should be well under the relevant load curve for long life.
Grade 8.8 bolts can be used but only after approval by our technical team.
Similarly if the load is suspended or the axis of rotation is not vertical please refer the application details to us and take advantage of our decades of experience!
ll QCB® slewing rings are manufactured to the highest possible quality levels in ISO certified factories. A QCB® Quality Standard defines all aspects of their dimensions and tolerances as well as all aspects of manufacturing from materials properties, all stages of production, as well as packing and labelling.
Whilst the data on the site is updated regularly, we reserve the right to implement subtle changes to these standards in our quest for continual product improvement.
Applications
While a flange reduces the overall weight of the bearing, it also reduces its torsional rigidity and these bearings are thus best suited to light or medium duty applications where there is not a high load eccentricity.
- Industrial positioners (e.g. welding assemblies and jigs)
- Ship or truck loading chutes and swivels
- Stretch wrapping machines
- Conveyors and other materials handling equipment
- Simple amusement rides
If the IMPERIAL sizes and bolt patterns are not quite right, consider the FEG20 Metric Series
Need help?
Our technical team have many years of experience and are happy to assist with selection. Call or e-mail them for fast, efficient and professional advice.
The Design Form will assist you in defining your application details.
For any enquiries regarding FEG 20 Imperial Series, please complete our enquiry form, and a member of our technical team will respond promptly. Alternatively, you can reach out directly to one of our offices using the contact details here. Our specialists are ready to provide guidance and support tailored to your machinery and engineering needs.