Deep groove ball bearings

Product Description

Deep groove ball bearings are the most widely used bearing type and are particularly versatile. They have low friction and are optimized for low noise and low vibration which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than other bearing types. 

Because deep groove ball bearings are the most widely used bearing type, they are available from NEWORLD in many designs, variants and sizes.

Single row deep groove ball bearings

Single row deep groove ball bearings (fig. 1) are available capped (with seals or shields) or open. Open bearings that are also available capped may have recesses in the ring side faces (fig. 2). 

Stainless steel deep groove ball bearings

Stainless steel deep groove ball bearings (fig. 1) are available capped (with seals or shields) or open. Open bearings that are also available capped may have recesses in the ring side faces (fig. 2).

These bearings have a lower load carrying capacity than same-sized bearings made of high chromium steel.

Single row deep groove ball bearings with filling slots

Single row deep groove ball bearings with filling slots have a filling slot in both the inner and outer rings (fig. 3) to accommodate more balls than standard deep groove ball bearings.

Filling slot bearings have a higher radial load carrying capacity than bearings without filling slots, but their axial load carrying capacity is limited. They are also unable to operate at the same high speeds as bearings without filling slots. 

Deep groove ball bearings with filling slots are available open or with shields on one or both sides. They are also available with or without a snap ring groove. Open bearings that are also available with shields may have recesses in the outer ring (fig. 4) 

Large size deep groove ball bearings with filling slots, without cage, are available on request.

Double row deep groove ball bearings

Double row deep groove ball bearings (fig. 5) are very suitable for bearing arrangements where the load carrying capacity of a single row bearing is inadequate. For the same bore and outside diameter, double row bearings are slightly wider than single row bearings in the 62 and 63 series, but have a considerably higher load carrying capacity. 

Double row deep groove ball bearings are only available as open bearings (without seals or shields) 

Capped bearings

Capped bearings

The seals, which are fitted in a recess on the outer ring, make good, positive contact with the recess, without deforming the outer ring. The capping devices are available as: 

Shields (designation suffixes Z or ZS)

   ●  are primarily intended for applications where the inner ring rotates

   ●  are fitted in the outer ring and form a narrow gap with the inner ring

   ●  are made of sheet steel, or stainless steel for stainless steel bearings

   ●  protect from dirt and debris without friction losses

   ●  are supplied in different designs (fig. 6):

       – with designation suffix Z: either with (a) or without (b) an extension in the shield bore or on some 

          stainless steel bearings, the shield bore  can extend into a recess in the inner ring (c)

       – with designation suffix ZS (stainless steel bearings only):fixed in the outer ring by a retaining ring 

          and may extend into a recess (d)

       – available on request for stainless steel bearings only: shields made of PTFE 

Non-contact seals (designation suffix RZ)

   ●  provide better sealing effectiveness than shields

   ●  can be operated at the same speeds as shields

   ●  form an extremely narrow gap with the inner ring shoulder (fig. 7)

   ●  are made of sheet steel reinforced NBR (oil- and wear-resistant)

Low-friction seals (designation suffixes RSL or RST)

   ●  provide better sealing effectiveness than non-contact seals

   ●  are made of sheet steel reinforced NBR (oil- and wear-resistant)

  RSL design (fig. 8):

   ●  can be operated at the same speeds as shields

   ●  make virtually no contact with a recess in the inner ring shoulder

   ●  are available for 60, 62, 63 series bearings in two designs, depending on the size

  RST design (fig. 9):

   ●  make positive contact with a recess in the inner ring shoulder for good sealing effectiveness

   ●  are available on request for 60, 62 and 63 series bearings in three designs, depending on the size 

Contact seals (designation suffixes RSH, RSH2, RS1, RS1/VP311 or RS2)

   ●  are made of sheet steel reinforced

       – NBR

       – FKM (designation sufix RS2 or RSH2, available on request)

       – food compatible, blue-coloured NBR* (designation sufix VP311 and for stainless steel bearings only)

   ●  are available in different designs depending on the bearing they are used with (fig. 10):

       – for 60, 62 and 63 series bearings in two RSH designs (a, b), depending on the size

       – for RS1 designs, with sealing either against the inner ring shoulder (c) or against a recess in the inner 

          ring side face for chromium steel bearings (d) or for stainless steel bearings (e), the relevant design 

          is determined by dimension d1 or d2 in the product table 

CAGES

Bearings with a snap ring groove

   ●  can simplify the design of an arrangement

       – by locating the bearing axially in the housing by a snap ring (fig. 11) 

       – by saving space

       – by significantly reducing mounting time 

Appropriate snap rings are shown in the product table along with their designation and dimensions.

The following variants are available (fig. 12):

   ●  open bearings with a snap ring groove only (designation suffix N)

   ●  open bearings with a snap ring (designation suffix NR)

   ●  bearings with a snap ring and a shield on the opposite side (designation suffix ZNR)

   ●  bearings with a snap ring and a shield on the same side (designation suffix ZNBR)

   ●  bearings with a snap ring and a shield on both sides (designation suffix 2ZNR) 

Bearings with a flanged outer ring

Certain sizes of NEWORLD stainless steel deep groove ball bearings are also available with a flange on the outer ring (designation suffix R, fig. 13) They:

    ●  can be supplied open or capped

    ●  are relatively easy to locate axially in the housing

    ●  enable easier and more costeffective housing bore manufacture, no shoulders required 

Quiet running bearings for large electric generators

   ●  are designed to comply with stringent noise requirements

   ●  are typically used in wind turbine generators

   ●  provide consistent performance over a variety of operating conditions

   ●  are identified by the designation suffix VQ658 

Cages

Depending on their design, series and size, NEWORLD deep groove ball bearings are fitted with one of the cages shown in table 5. Double

row bearings are equipped with two cages. The standard stamped steel cage is not identified in the bearing designation If non-standard cages are required, check availability prior to ordering. 

When used at high temperatures, some lubricants can have a detrimental effect on polyamide cages. 

MATCHED BEARINGS

Matched bearings

   ●  are used where the load carrying capacity of a single bearing is inadequate

   ●  are used where the shaft has to be located axially in both directions with a specific axial clearance

   ●  where mounted immediately adjacent to each other, distribute the load between the bearings 

       without having to use shims or similar devices

A "V shaped"marking on the outside surface of the outer rings of matched bearings (fig. 14) indicates how the pair should be mounted. The bearing pairs are supplied as a packaged unit. 

Matched pairs can be supplied in three different arrangements (fig. 15):

Tandem arrangement (designation suffix DT)

   ●  is used where the load carrying capacity of a single bearing is inadequate

   ●  has parallel load lines and therefore shares the radial and axial loads equally

   ●  can accommodate axial loads in both directions 

Back-to-back arrangement (designation suffix DB)

   ●  has load lines that diverge towards the bearing axis

   ●  provides a relatively stiff bearing arrangement

   ●  can accommodate tilting moments

   ●  can accommodate axial loads in both directions, but only by one bearing in each direction

Face-to-face arrangement (designation suffix DF)

   ●  has load lines that converge towards the bearing axis

   ●  is less sensitive to misalignment but not as stiff as a back to back arrangement

   ●  can accommodate axial loads in both directions, but only by one bearing in each direction 

aPPLICATION

Features and benefits

   ●  Low friction and running temperatures, low noise and vibration

   ●  High running speeds

   ●  High quality and performance capabilities for your application

   ●  Accommodate radial loads and axial loads in both directions

   ●  Available with a variety of greases for most conditions, including food quality grease, high 

       temperature grease and Solid Oil

   ●  Increased reliability and provide long bearing and lubricant service life 

Temperature limits

The permissible operating temperature for deep groove ball bearings can be limited by:

  ●  the dimensional stability of the bearing rings and balls

  ●  the cage

  ●  the seals

  ●  the lubricant

Where temperatures outside the permissible range are expected, contact NEWORLD.

Bearing rings and balls

NEWORLD deep groove ball bearings are heat stabilized up to at least 120 °C (250 °F).

Cages

Steel, stainless steel, brass or PEEK cages can be used at the same operating temperatures as the bearing rings and balls. 

Seals

The permissible operating temperature for seals depends on the seal material:

  ●  NBR: –40 to +100 °C (–40 to +210 °F)

      Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.

  ●  FKM: –30 to +200 °C (–20 to +390 °F)

      Temperatures up to 230 °C (445 °F) can be tolerated for brief periods 

Typically, temperature peaks are at the seal lip 

Applications

Deep groove ball bearings are the most widely used bearing type and are suitable for many different industries. Matching that versatility across many different applications, they are available in a wide range of designs, variants and sizes. 

Here are examples of applications in which deep groove ball bearings might be used:

   ●  Electric motors and generators

   ●  Agriculture

   ●  Material handling

   ●  Industrial transmissions

   ●  Food and beverage

   ●  Industrial pumps

   ●  Industrial fans

   ●  Two and three wheelers

   ●  Cars and light trucks

   ●  Textile machinery

   ●  Light conveyors for postal, luggage and food conveyors

   ●  Bulk conveyors for mining, port and power plant conveyors 

   ●  Pharmaceutical

   ●  Chemical and hydrocarbon processing

   ●  Medical

   ●  Printing

   ●  Paper

   ●  Offshore