FIG 20 Metric Series

A flange profile outer and a geared inner ring separated by a 20 mm ball set; a constant section height of 56 mm and a standard range of external diameters ranging from 418 mm to 1198 mm

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 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.


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 METRIC sizes and bolt patterns are not quite right, consider the FIG20 Imperial

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.

QCB referenceOutline dimensions & weight



mmmmmmmmmm kg
FIG 418 20 00 AA LM418353315.5312.5226.5121
FIG 505 20 00 AA LM518453415.5412.5326.5227
FIG 650 20 00 AA LM648583545.5542.5445.2337.5
FIG 750 20 00 AA LM748683645.5642.5547.2444.5
FIG 850 20 00 AA LM848783745.5742.5649.2551
FIG 950 20 00 AA LM948883845.5842.5737.6661
FIG 1050 20 00 AA LM1048983945.5942.5841.6765
FIG 1200 20 00 AA LM119811331095.51092.5985.6880
QCB referenceOuter holesInner holes20o spur gear
LanaLiniPmzFz MAX
mm mm mm KN
FIG 418 20 00 AA LM39082751223554734
FIG 505 20 00 AA LM49083751233556734
FIG 650 20 00 AA LM620105051645667641
FIG 750 20 00 AA LM720126051855869341
FIG 850 20 00 AA LM8201270520660611041
FIG 950 20 00 AA LM920148052075289455
FIG 1050 20 00 AA LM10201690522856810755
FIG 1200 20 00 AA LM1170161055241000812555
Standard grease fitting# at least 2 x M8 on outer ring

Custom designs

  • Double drilled or custom drilling patterns
  • Higher precision bearings with location diameters
  • Reduced internal clearance (Class 5 & Class 6)
  • Black oxide or zinc plating for enhanced corrosion protection
  • Epoxy paint or even Nylon coated units to special order
  • Stainless steel or aluminium versions


All geared slewing rings are manufactured in 42CrMo4 V steel to offer superior gear strength over some other brands.

Internal construction

Standard FIG20 Metric 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.


A land riding NBR (nitrile rubber) seal strip is standard. VITON seals can be supplied to order.


The FIG20 Metric series has a standard 20° pressure angle, uncorrected spur gear cut into the inner ring.


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. FIG20 Metric Series slewing rings will usually have 4 or 6 grease nipples DIN 71412 M8x1 on the radial face of the outer 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!

QCB ReferencePDF PrintCAD.dwgMODEL.STP
FIG 418 20 00 AA LMFIG 418 20.pdfFIG 404 20.dwgFIG 404 20.STP
FIG 505 20 00 AA LMFIG 505 20.pdfFIG 505 20.dwgFIG 505 20.STP
FIG 650 20 00 AA LMFIG 650 20.pdfFIG 650 20.dwgFIG 650 20.STP
FIG 750 20 00 AA LMFIG 750 20.pdfFIG 750 20.dwgFIG 750 20.STP
FIG 850 20 00 AA LMFIG 850 20.pdfFIG 850 20.dwgFIG 850 20.STP
FIG 950 20 00 AA LMFIG 950 20.pdfFIG 950 20.dwgFIG 950 20.STP
FIG 1050 20 00 AA LMFIG 1050 20.pdfFIG 1050 20.dwgFIG 1050 20.STP
FIG 1200 20 00 AA LMFIG 1200 20.pdfFIG 1200 20.dwgFIG 1200 20.STP

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