SEG 20 Metric Series

A solid profile outer ring with an external geared ring separated by a 20mm ball set; a constant section height of 56mm and a standard outside diameter range from 404mm to 1200mm.

SEG 20 Series bearings offer a longer service life compared to FEG 20 Series bearings.

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

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Product Overview

A solid profile outer ring with an external geared ring separated by a 20mm ball set; a constant section height of 56mm and a standard outside diameter range from 404mm to 1200mm.

SEG 20 Series bearings offer a longer service life compared to FEG 20 Series bearings.

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.

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

Dimensions

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QCB reference	Outline dimensions & weight
	D_a	D_i	U	C	d_af9	d_iH9	Load curve	Weight
	mm	mm	mm	mm	mm	mm	Load curve	kg

SEG 404 20 01 AA LM	404	242	315.5	312.5		244	1	23
SEG 505 20 01 AA LM	503.3	342	415.5	412.5		344	2	31
SEG 650 20 01 AA LM	640.6	472	545.5	542.5		474	3	43
SEG 750 20 01 AA LM	742.3	572	645.5	642.5		574	4	52
SEG 850 20 01 AA LM	838.1	672	745.5	742.5		674	5	59
SEG 950 20 01 AA LM	950.1	772	845.5	842.5		774	6	71
SEG 1050 20 01 AA LM	1046.1	872	945.5	942.5		874	7	77
SEG 1200 20 01 AA LM	1198.1	1022	1095.5	1092.5		1024	8	91

QCB reference	Outer holes		Inner holes		20^o spur gear
	L_a	n_a	L_i	n_i	P	m	z	F_{z MAX}
	mm		mm		mm			KN

SEG 404 20 01 AA LM	355	20	268	20	395	5	79	33
SEG 505 20 01 AA LM	455	20	368	24	495	5	99	33
SEG 650 20 01 AA LM	585	28	498	32	630	6	105	39
SEG 750 20 01 AA LM	685	32	598	36	732	6	122	39
SEG 850 20 01 AA LM	785	36	698	40	828	6	138	39
SEG 950 20 01 AA LM	885	36	798	40	936	8	117	52
SEG 1050 20 01 AA LM	985	40	898	44	1032	8	129	52
SEG 1200 20 01 AA LM	1135	44	1048	48	1184	8	148	52

Standard grease fitting	# at least 2x M8 on inner ring

Interchange information

The SEG20 Metric 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.

SEG 505 20 01 AA	E 505 20 00 CC	31.0411.01.ZZ.00	171.20.0414.00.00.10	VSA 20 0414 N	061.20.0414.500.01.1503
SEG 650 20 01 AA	E 650 20 00 CC	31.0541.01.ZZ.00	171.20.0544.00.00.10	VSA 20 0544 N	061.20.0544.500.01.1503
SEG 750 20 01 AA	E 750 20 00 CC	31..0641.01.ZZ.00	171.20.0644.00.00.10	VSA 20 0644 N	061.20.0644.500.01.1503
SEG 850 20 01 AA	E 850 20 00 CC	31.0741.01.ZZ.00	171.20.0744.00.00.10	VSA 20 0744 N	061.20.0744.500.01.1503
SEG 950 20 01 AA	E 950 20 00 CC	31.0841.01.ZZ.00	171.20.0844.00.00.10	VSA 20 0844 N	061.20.0844.500.01.1503
SEG 1050 20 01 AA	E 1050 20 00 CC	31.0941.01.ZZ.00	171.20.0944.00.00.10	VSA 20 0944 N	061.20.0944.500.01.1503
SEG 1200 20 01 AA	E 1200 20 00 CC	31.1091.01.ZZ.00	171.20.1094.00.00.10	VSA 20 1094 N	061.20.1094.500.01.1503

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Technical

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

Materials

From 2015 all SEG20 Metric Series slewing rings will be manufactured in 42CrMo4 steel. Smaller units are usually produced in 50Mn / C45.

Internal construction

Standard SEG20 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 SEG20 Metric 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. SEG20 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!

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Downloads

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.

Applications

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.

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Enquire Now About SEG 20 Metric Series

For any enquiries regarding SEG 20 Metric 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.