SIG 20 Metric Series

Two solid section rings separated by a 20mm ball set, with the internal ring being geared. This series has a constant height of 56mm, and a standard range of external diameters ranging from 486mm to 1166mm.

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.


  • 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

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
DaDiUCda f9di H9



SIG 386 20 01 AA LM386224315.5312.5384122
SIG 486 20 01 AA LM486324415.5412.5484231
SIG 616 20 01 AA LM616444545.5542.5614342
SIG 716 20 01 AA LM716546645.5642.5714450
SIG 816 20 01 AA LM816648745.5742.5814558
SIG 916 20 01 AA LM916736845.5842.5914669
SIG 1016 20 01 AA LM1016840945.5942.51014776
SIG 1166 20 01 AA LM11669841095.51092.51164891
QCB referenceOuter holesInner holes20o spur gear
LanaLiniPmzFz MAX
mm mm mm KN
SIG 386 20 01 AA LM 360242752423554734
SIG 486 20 01 AA LM460243752433556734
SIG 616 20 01 AA LM590325053245667641
SIG 716 20 01 AA LM690366053655869341
SIG 816 20 01 AA LM7904070540660611041
SIG 916 20 01 AA LM890408054075289455
SIG 1016 20 01 AA LM9904490544856810755
SIG 1166 20 01 AA LM1140481055481000812555
Standard grease fitting# at least 2x M8 on outer ring

Interchange information

The SIG20 series is interchangeable with bearings from other manufacturers such as Roth Erde, Torriani Gianni, INA, Schaeffler, SKF, RKS, RIMA, La Leonessa and many more. However there may be variations to this rule (e.g. OEM variants) and we invite you to refer to our technical staff for assistance.

SIG 486 20 01 AAI 486 20 00 CC32.0411.01.ZZ.00172.20.0414.00.00.10VSI 20 0414 N062.20.0414.500.01.1503
SIG 616 20 01 AAI 616 20 00 CC32.0541.01.ZZ.00172.20.0544.00.00.10VSI 20 0544 N062.20.0544.500.01.1503
SIG 716 20 01 AAI 716 20 00 CC32.0641.01.ZZ.00172.20.0644.00.00.10VSI 20 0644 N062.20.0644.500.01.1503
SIG 816 20 01 AAI 816 20 00 CC32.0741.01.ZZ.00172.20.0744.00.00.10VSI 20 0744 N062.20.0744.500.01.1503
SIG 916 20 01 AAI 916 20 00 CC32.0841.01.ZZ.00172.20.0844.00.00.10VSI 20 0844 N062.20.0844.500.01.1503
SIG 1016 20 01 AAI 1016 20 00 CC32.0941.01.ZZ.00172.20.0944.00.00.10VSI 20 0944 N062.20.0944.500.01.1503
SIG 1166 20 01 AAI 1166 20 00 CC32.1091.01.ZZ.00172.20.1094.00.00.10VSI 20 1094 N062.20.1094.500.01.1503


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


From 2015 all SIG20 Metric Series slewing rings will be manufactured in 42CrMo4 steel. Smaller units are usually produced in 50Mn / C45.

Internal construction

Standard SIG20 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 SIG20 Metric series is internally geared


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. SIG20 Metric 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!

QCB referencePDF Print
SIG 486 20 00 CC LMSIG 486 20.pdf
SIG 616 20 00 CC LMSIG 616 20.pdf

SIG 716 20 00 CC LM

SIG 716 20.pdf
SIG 816 20 00 CC LMSIG 816 20.pdf
SIG 916 20 00 CC LMSIG 916 20.pdf
SIG 1016 20 00 AA LMSIG 1016 20.pdf
SIG 1116 20 00 AA LMSIG 1116 20.pdf

The 3D models for these bearings are available from 3DContentCentral - search for "QCB SIG"

Associated Products

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