Page 968 - Rollingbearings

16 Cam followers
KR design cam KR design cam followers, sizes 16 KR design cam followers,
designation sufix B, sizes ≥ 22
and 19
followers
• without a designation sufix or with the • have a hexagonal recess at each end of the
• are available based on: designation sufix PPA (ig. 6) stud (ig. 4), enabling the cam follower to
– a needle roller and cage assembly (ig. 4) – have one slot in the head of the stud be held in place by a hexagonal key (Allen
– a full complement needle roller set that enables the stud to be held in place wrench) during mounting
(ig. 5, V in the basic designation) by a screwdriver during mounting • have a relubrication hole for a press-in
Cam followers based on a full comple- – have a relubrication hole for a press-in grease itting in the centre of each hex-
ment of needle rollers accommodate grease itting or a plug if relubrication is agonal recess
16 higher loads than same-sized cam not required in the centre of the slot • can accommodate adapters from a cen-
followers with a cage (Accessories, page 968) tralized lubrication system for sizes ≥ 35
• have the outer ring axially guided by the • with the designation sufix PPSKA (ig. 7) (Accessories, page 968)
pressed-on lange ring and the stud head – have a hexagonal recess in the head of
(integral lange), forming a gap-type seal the stud that enables the stud to be held
• are also available with an axial sliding ring in place by a hexagonal key (Allen
on both sides (designation sufixes PPA, wrench) during mounting
ig. 6, or PPSKA, ig. 7, or PPXA): – have no relubrication features
– 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
cam follower, keeping friction and fric-
tional heat low, and extending grease
life

Fig. 4 Fig. 5
KR ‥ B design, sizes 22 and 26 KRV ‥ PPA design, sizes ≥ 30

Fig. 6
KR ‥ PPA designs

Sizes 16 and 19 Sizes 22 and 26 Sizes ≥ 30

966