FUN 20 Metric series

A pair of flange profile rings 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

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 transmission 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

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 METRIC sizes and bolt patterns are not quite right, consider the FUN20 Imperial 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

Dimensions

QCB reference	Outline dimensions & weight
	D_a	B	U	C	D	D_i	Load curve	Weight
	mm	mm	mm	mm	mm	mm	Load curve	kg

FUN 318 20 00 CC LM	318	253	215.5	212.5	175	105	ASK	12
FUN 418 20 00 CC LM	418	353	315.5	312.5	275	204	1	19
FUN 505 20 00 CC LM	518	453	415.5	412.5	375	304	2	23.5
FUN 650 20 00 CC LM	648	583	545.5	542.5	505	434	3	31
FUN 750 20 00 CC LM	748	683	645.5	642.5	605	534	4	36.5
FUN 850 20 00 CC LM	848	783	745.5	742.5	705	634	5	43
FUN 950 20 00 CC LM	948	883	845.5	842.5	805	734	6	48
FUN 1050 20 00 AA LM	1048	983	945.5	942.5	905	834	7	53
FUN 1200 20 00 AA LM	1198	1133	1095.5	1092.5	1055	984	8	62

QCB reference	Outer holes		Inner holes
	L_a	n_a	L_i	n_i
	mm		mm

FUN 318 20 00 CC LM	290	8	132	8
FUN 418 20 00 CC LM	390	8	232	12
FUN 505 20 00 CC LM	490	8	332	12
FUN 650 20 00 CC LM	620	10	462	14
FUN 750 20 00 CC LM	720	12	562	16
FUN 850 20 00 CC LM	820	12	662	16
FUN 950 20 00 CC LM	920	14	762	18
FUN 1050 20 00 AA LM	1020	16	862	20
FUN 1200 20 00 AA LM	1170	16	1012	20

Interchange information

The FUN20 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.

Basic QCB Ref	Torriani	Rollix	Roth Erde		INA
FUN 418 20 00
FUN 505 20 00	SD 505 20 00 C	23.0411.01.ZZ.00	230.20.0400.013	21/520.0	VLU 20 0414 N
FUN 650 20 00	SD 650 20 00 C	23.0541.01.ZZ.00	230.20.0500.013	21/650.0	VLU 20 0544 N
FUN 750 20 00	SD 750 20 00 C	23.0641.01.ZZ.00	230.20.0600.013	21/750.0	VLU 20 0644 N
FUN 850 20 00	SD 850 20 00 C	23.0741.01.ZZ.00	230.20.0700.013	21/850.0	VLU 20 0744 N
FUN 950 20 00	SD 950 20 00 C	23.0841.01.ZZ.00	230.20.0800.013	21/950.0	VLU 20 0844 N
FUN 1050 20 00	SD 1050 20 00 C	23.0941.01.ZZ.00	230.20.0900.013	21/1050.0	VLU 20 0944 N
FUN 1200 20 00	SD 1200 20 00 C	23.1091.01.ZZ.00	230.20.1000.013	21/1200.0	VLU 20 1094 N

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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

All our QCB^® FUN20 Metric Series slewing rings >1000mm outer diameter manufactured in 42CrMo4 steel. Smaller units are usually produced in 50Mn / C45.

Internal construction

Standard FUN20 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 FUN20 Metric series is ungeared

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. FUN20 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

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Enquire Now About FUN 20 Metric series

For any enquiries regarding FUN 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.