INSOCOAT Deep Groove Ball Bearings

Product Description

INSOCOAT bearings are designed to prevent electric current from passing through the bearing. The external surfaces of either their inner or outer ring are coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish. The solutions are very cost-effective compared with other insulation methods.

Whenever an electric current passes through rolling bearings, there is a potential threat to the reliability of your machines. Electrical erosion can damage and degrade bearings in traction motors, electric motors and generators, leading to costly downtime and unplanned maintenance. 

With its latest generation of insulated bearings, NEWORLD has raised the performance standard. INSOCOAT bearings offer high levels of reliability and uptime for electrical applications, even in the most challenging environmental conditions. 

Designs and variants

The standard assortment of INSOCOAT bearings listed here constitutes the most commonly used sizes

and variants of:

● single row deep groove ball bearings (fig. 1)

● single row cylindrical roller bearings (fig. 2)

Customized solutions

NEWORLD can also supply INSOCOAT bearings with complex ring geometries, large size bearings and

bearing units. 

Choice of Coatings

Coated outer ring

Bearings with an electrically insulating coating on the external surfaces of the outer ring are the most

Common INSOCOAT types. They are:

● Recommended for medium-sized motors using bearing sizes with a bore diameter < 120 mm

● Suitable for all housing types

● Can be applied to bearings with an outside diameter > 80 mm

● Identiied by the sufixes VL0241 and VL0246

Coated inner ring

Bearings with an electrically insulating coating on the external surfaces of the inner ring provide enhanced

Protection against electric current damage, as the smaller coated surface area offers higher impedance. 

They are:

● Recommended for larger-sized motors using bearing sizes with a bore diameter > 120 mm

● Can be applied to bearings with a bore diameter > 70 mm

● Identiied by the sufix VL2071 and VL2076

Features

Designation system

Refer to Designation system of the relevant standard bearing:

● Deep groove ball bearings

● Single row cylindrical roller bearings

The designation suffixes used to identify INSOCOAT bearings are explained in the following.

VL0241 External surfaces of the outer ring are coated - standard layer

VL0246 External surfaces of the outer ring are coated - advanced layer

VL2071 External surfaces of the inner ring are coated - standard layer

VL2076 External surfaces of the inner ring are coated - advanced layer

Cages

NEWORLD INSOCOAT deep groove ball bearings are fitted with one of the following cages:

● a stamped steel cage, riveted, ball centred (no designation suffix)

● a machined brass cage, riveted, ball centred (designation suffix M)

INSOCOAT cylindrical roller bearings are fitted with one of the following cages:

● a glass fibre reinforced PA66 cage, window-type, roller centred (designation suffix P)

● a machined brass cage, riveted, roller centred (designation suffix M)

● a machined brass cage, window-type, inner or outer ring centred (depending on bearing design) (designation suffix ML)

Temperature limits

The permissible operating temperature for INSOCOAT bearings can be limited by:

● the dimensional stability of the bearing rings and rolling elements

● the cage

● the lubricant

Bearing rings and rolling elements

NEWORLD INSOCOAT bearings are heat stabilized up to at least 150 °C (300 °F).

Cages

Steel or brass cages can be used at the same operating temperatures as the bearing rings and rolling elements. For temperature limits of PA66 cages, refer to Polymer cages.

Benefit

High-quality coating

INSOCOAT bearings feature an insulating layer of aluminium oxide applied by a sophisticated plasma

Spray process for outstanding quality, which provide the following benefits:

• Resistance to common media used in bearing applications

• Protection over a wide range of operating temperatures

• Minimum electrical resistance of 200 MOhm 

• Tested to withstand voltages of 3 000 V DC (coatings that can handle higher voltages can be quoted on request)

Protective sealant

Plasma spray coatings are normally hygroscopic and therefore vulnerable to being penetrated by

condensation. INSOCOAT bearings are treated with a unique sealant to protect against this effect.

Engineering support

NEWORLD can provide you with the relevant electrical parameters for your bearings so you can choose the

best insulating solution for your needs.

Stock availability

The most frequently used sizes and variants of INSOCOAT bearings are available from stock as single row

Deep groove ball bearings and single row cylindrical roller bearings. Specific customized ranges and

products are available on request. Performance data, dimensional and running accuracy are identical to

non-insulated bearings.

Improved machine reliability

With INSOCOAT, bearing failures caused by stray electric currents are virtually eliminated, so machines are

More reliable and run longer.

Cost-effective protection against electric current damage

INSOCOAT combines bearings and insulation in a single solution. Compared with shaft or housing

insulation, INSOCOAT bearings protect against electrical erosion at a signiicantly lower total cost of

ownership.

Increased machine uptime and reduced maintenance costs

INSOCOAT bearings prolong machine life which results in longer maintenance intervals.

Easy to mount, ready to use

INSOCOAT bearings can be installed with standard methods and tooling, and are highly robust during

transport and handling.

Application

Applications

Here are examples of applications in which INSOCOAT bearings might be used:

● Railways

● Electric motors and generators

● Wind energy

● Construction

● Industrial pumps