Product Description
NEWORLD support rollers (yoke-type track rollers based on roller bearings) are designed to run on all types of tracks and to be used in cam drives, conveyor systems, etc.
NEWORLD support rollers are ready-to-mount and based on needle or cylindrical roller bearings. To meet the requirements of different applications, they are available in several designs and variants (fig. 1):
● with or without a cage
● with or without flange rings
● with or without an inner ring
● with or without seals (sealed or open)
● with the outer ring running surface profile:
– crowned as standard
– cylindrical (flat)
Support rollers without flange rings
Designs and variants
NEWORLD support rollers are available without or with Flange rings (fig. 2). They have a thick walled outer ring with its running surface
crowned as standard. However, support rollers with a cylindrical (lat) running surface are also available (designation suffix X).
Support rollers without flange rings require adjacent components to guide the outer ring and cage axially while support rollers with flange rings do not need adjacent components to guide the outer ring and cage axially (fig. 3). Axial loads, which are induced when shafts are not horizontal or aligned properly, are accommodated by the flange rings.
Support rollers without flange rings
● require adjacent components to guide the outer ring and cage axially
● are based on needle roller bearings
● are available:
– with an inner ring, which is slightly wider than the outer ring to avoid axial clamping of the outer ring
– without an inner ring (designation prefix R), intended for arrangements where the pin or shaft is
hardened and ground.
(R)STO design support rollers
● are available (fig. 4):
– with an inner ring that can be mounted separately from the outer ring and roller and cage assembly,
which must always be kept together as supplied
– without an inner ring (prefix R)
– only open (without seals)
(R)NA 22…2RS design support rollers
● are available (fig. 5):
– with an inner ring that can be mounted separately from the outer ring and roller and cage assembly
– without an inner ring (preix R)
– greased and capped with a sheet steel reinforced NBR contact seal on both sides
● have the needle roller and cage assembly axially guided between two integral flanges in the outer ring
to form a non-separable unit
Support rollers with flange rings
Support rollers with flange rings
● do not need adjacent components to guide the outer ring and cage axially
● are non-separable units
● have different flange designs:
– pressed-on flange rings (NATR and NATV designs)
– loose flange rings (NUTR, PWTR and NNTR designs)
● accommode axial loads that can occur because of skew or tilting
NATR and NATV design support rollers
● are based on (fig. 6):
– a needle roller and cage assembly (NATR design)
– a full complement of needle rollers (NATV design)
● have the outer ring axially guided by pressed-on flange rings, forming a gap-type seal
● are also available with an axial sliding ring on both sides (designation suffixes PPA, fig. 7, and PPXA):
– made of PA66
– forming narrow labyrinth seals with the outer ring in a radial direction, to protect against coarse
contaminants
– serving as contact seals in an axial direction to retain grease reliably in the bearing
– improving lubrication conditions in the bearing, keeping friction and frictional heat low, and
extending grease life
NUTR ‥ A design support rollers
● are based on double row full complement cylindrical roller bearings without an integral flange
between the two roller sets (fig. 8)
● have an outer ring with two integral flanges, which guide the roller sets axially
● have an inner ring with two loose flange rings, which guide the outer ring axially via the roller sets
● have a sheet metal angle ring pressed into the outer ring shoulder on both sides:
– forming an effective labyrinth seal
– extending over the flange rings, making the bearing non-separable
● accommodate relatively heavy axial loads that can occur because of skew or tilting
● can be supplied with a reinforced (thicker) outer ring to accommodate heavy peak loads (e.g. NUTR 50
A + NUTR 50110 A)
PWTR …2RS design support rollers
● are based on double row full complement cylindrical roller bearings (fig. 9)
● have an outer ring with three integral flanges, which guide the roller sets axially
● have an inner ring with two loose flange rings, which guide the outer ring axially via the roller sets
● have a relatively large grease quantity between the two roller sets
● are fitted on both sides with an NBR contact seal, being integral with a sheet metal angle ring that is
pressed into the outer ring shoulder:
– to press against the flange rings
– extending over the flange rings, making the bearing non-separable
● accommodate relatively heavy axial loads that can occur because of skew or tilting
● can be supplied with a reinforced (thicker) outer ring to accommodate heavy peak loads (e g PWTR 50
2RS + PWTR 50110 2RS)
NNTR …2ZL design support rollers
● are based on double row full complement cylindrical roller bearings (fig. 10)
● have an outer ring with three integral flanges, which guide the roller sets axially
● have an inner ring with two loose flange rings, which guide the outer ring axially via the roller sets
● have a relatively large grease quantity between the two roller sets
● are fitted with a lamellar seal on both sides, inserted into recesses in the shoulders of the flange rings
and the outer ring, making the bearing non-separable
● accommodate very heavy radial loads and relatively heavy axial loads that can occur because of skew
or tilting
Cages
Cages
NEWORLD support rollers, if not a full complement of rollers, are fitted with one of the cages shown in table 1. The standard cage is not identified in the bearing designation.
Features and benefits
● Accommodate high radial loads
The thick-walled outer ring enables high radial loads, while reducing distortion and bending stresses.
● Accommodate axial loads
The integral flange (stud head) and the pressed-on flange ring enable cam followers to accommodate
axial loads that can occur because of skew or tilting.
● Long service life
The crowned outer ring running surface is beneficial for applications where outer ring tilting relative to
the track may occur or where edge stresses need to be minimized.
● Easy to mount
The threaded solid stud (pin) of cam followers can be quickly and easily attached to appropriate
machine components by means of a hexagonal nut.
Temperature limits
The permissible operating temperature for support rollers can be limited by:
● the dimensional stability of the bearing rings and rollers
● the cage
● the seals
● the lubricant
Where temperatures outside the permissible range are expected, contact NEWORLD.
Bearing rings and rollers
NEWORLD support rollers are heat stabilized up to at least 140 °C (280 °F).
Cages
Steel cages can be used at the same operating temperatures as the bearing rings and rollers. For temperature limits of PA66 cages, refer to Polymer cages.
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.
● PA66 sliding rings: –30 to +100 °C (–20 to +210 °F)
Typically, temperature peaks are at the seal lip.
Application
Applications
Here are examples of applications in which support rollers might be used:
● Metals
● Mining, mineral processing and cement
● Railways
● Material handling
● Agriculture
● Construction
