Cam follower (stud-type track roller) NUKR

Designation	Stud diameter	Overall width	Outside diameter	Outer ring width	Thread stud	Thread length	Maximum dynamic radial load	Maximum static radial load
NUKRE 80	30	100	80	35	M30 x 1.5	32	47.5	98
NUKRE 90	30	100	90	35	M30 x 1.5	32	77	117

Designations

NUKR	E	35	X	SS	RR
1	2	3	4	5	6
1. Cam followers series: NUKR
2. Stud adjustable: Centric – remove prefix “E”; Centric stud with eccentric collar – add prefix “E”
3. Roller size: this data is outside dimeter
4. Profile outer ring: Crowned-blank; Cylindrica l- suffix “X”
5. Material: High Carbon chrome steel – blank; Stainless steel-suffix “SS”; Casehardened steel-suffix “CS”
6. Coating: Special corrosion resistance coating – add suffix “RR”; Oxide black surface finish – add suffix “B”

Features and Benefits

Features of NUKR series cam followers

are based on double row full complement cylindrical roller bearings without an integral flange between the two roller sets
have the outer ring axially guided by the stud head and pressed-on flange ring via the roller sets
have a sheet metal angle ring pressed into the outer ring shoulder on both sides, forming an effective labyrinth seal
have a hexagonal recess at each end of the stud, enabling the cam follower to be held in place by a hexagonal key (Allen wrench) during mounting
have a relubrication hole for a press-in grease fitting or an adapter from a centralized lubrication system in the centre of each hexagonal recess (Accessories)
have a relubrication hole and an annular groove in the stud seat
accommodate relatively heavy axial loads that can occur because of skew or tilting

Benefits of NUKR series cam followers

High radial load carrying capacity
The thick-walled outer ring enables high radial loads, while reducing distortion and bending stresses.
Accommodate axial loads due to skew or tilting
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.
Sealed for increased reliability, with relubrication feature

Temperature limits

The permissible operating temperature for cam followers can be limited by:

the stud, the outer ring and rollers
the cage
the seals
the lubricant
the other components

When temperatures outside the permissible range, please contact us.

Stud, outer ring and rollers

Cam followers are heat stabilized up to at least:

140 °C (280 °F) for designs based on a cylindrical roller bearing
120 °C (250 °F) for designs based on a needle roller bearing

Cages

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

steel cages can be used at the same operating temperature as the stud, the outer ring and rollers
120 °C (248 °F) for polyamide 66 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
PP: –20 to +80 °C (–5 to +185 °F)
PTFE: -196 to +260 °C (–320 to +500°F) * continuous working temperature had better below +200 °C ( +392°F)
Sheet metal angle rings can be used at the same operating temperatures as the stud, the outer rings and rollers

Lubricants

Lithium Soap Grease NLGI #2

SINOPEC Hangu 2# : –20 to +120 °C (–4 to +248 °F)
Shell Alvania EP2: –20 to +120 °C (–4 to +248 °F)

Other components

Eccentric collars and pressed-on flange rings can be used at the same operating temperature as the stud, the outer ring and rollers.

Tolerance and Clearance

Bearing tolerances and clearances

Tolerances: Normal, Other, Cam followers
Radial Internal clearance: Cam followers

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Cam Followers

d	Stud diameter	30 mm
B	Overall width	100 mm
D	Outside diameter	80 mm
C	Outer ring width	35 mm
G	Thread stud	M30 x 1.5
G₁	Thread length	32 mm
F_r	Maximum dynamic radial load	47.5 kN
F_0r	Maximum static radial load	98 kN

d	Stud diameter	30 mm
B	Overall width	100 mm
D	Outside diameter	90 mm
C	Outer ring width	35 mm
G	Thread stud	M30 x 1.5
G₁	Thread length	32 mm
F_r	Maximum dynamic radial load	77 kN
F_0r	Maximum static radial load	117 kN

Inner ring
d		tΔdmp		tVdsp¹⁾			tVdmp¹⁾	tΔBs			tVBs	tKia
				Diameter series				All	Normal	Modified³⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4		U	L	L
mm		μm		μm			μm	μm			μm	μm

–	2.5	0	–8	10	8	6	6	0	–40	–	12	10
2.5	10	0	–8	10	8	6	6	0	–120	–250	15	10
10	18	0	–8	10	8	6	6	0	–120	–250	20	10

18	30	0	–10	13	10	8	8	0	–120	–250	20	13
30	50	0	–12	15	12	9	9	0	–120	–250	20	15
50	80	0	–15	19	19	11	11	0	–150	–380	25	20

80	120	0	–20	25	25	15	15	0	–200	–380	25	25
120	180	0	–25	31	31	19	19	0	–250	–500	30	30
180	250	0	–30	38	38	23	23	0	–300	–500	30	40

250	315	0	–35	44	44	26	26	0	–350	–500	35	50
315	400	0	–40	50	50	30	30	0	–400	–630	40	60
400	500	0	–45	56	56	34	34	0	–450	–	50	65

500	630	0	–50	63	63	38	38	0	–500	–	60	70
630	800	0	–75	–	–	–	–	0	–750	–	70	80
800	1 000	0	–100	–	–	–	–	0	–1 000	–	80	90

1 000	1 250	0	–125	–	–	–	–	0	–1 250	–	100	100
1 250	1 600	0	–160	–	–	–	–	0	–1 600	–	120	120
1 600	2 000	0	–200	–	–	–	–	0	–2 000	–	140	140

Outer ring

D		tΔDmp		tVDsp⁴⁾				tVDmp⁴⁾	tΔCs, tVCs			tKea
				Open bearings			Capped bearings⁵⁾
				Diameter series			Capped bearings⁵⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4	2, 3, 4
mm		μm		μm				μm	μm			μm

2.5	18	0	–8	10	8	6	10	6	Identical to tΔBs and tVBs of an inner ring of the same bearing as the outer ring			15
18	30	0	–9	12	9	7	12	7				15
30	50	0	–11	14	11	8	16	8				20

50	80	0	–13	16	13	10	20	10				25
80	120	0	–15	19	19	11	26	11				35
120	150	0	–18	23	23	14	30	14				40

150	180	0	–25	31	31	19	38	19				45
180	250	0	–30	38	38	23	–	23				50
250	315	0	–35	44	44	26	–	26				60

315	400	0	–40	50	50	30	–	30				70
400	500	0	–45	56	56	34	–	34				80
500	630	0	–50	63	63	38	–	38				100

630	800	0	–75	94	94	55	–	55				120
800	1 000	0	–100	125	125	75	–	75				140
1 000	1 250	0	–125	–	–	–	–	–				160

1 250	1 600	0	–160	–	–	–	–	–				190
1 600	2 000	0	–200	–	–	–	–	–				220
2 000	2 500	0	–250	–	–	–	–	–				250

1) Except tapered bore. 2) Diameter series 7 and 8 not covered by ISO 492. 3) Applies to inner rings and outer rings of bearings of matched bearing sets consisting of two or more bearings. Does not apply to universally matchable angular contact ball bearings. 4) Applies to bearings prior to mounting and after removal of internal or external snap ring. 5) Capped bearings are sealed or shielded bearings.

Series Item	Miniature Type Cam Followers CFS	Standard Type Cam Followers (1)		Inch Series Cam Followers
		Crowned outer ring	Cylindrical outer ring	Crowned outer ring	Cylindrical outer ring
Outside dia. of outer ring D	See Table 2.1	0 －50	See Table 2.2	0 －50	See Table 2.3
Stud diameter d	h6	h7		＋ 25 0
Width of outer ring C	0 －120	0 －120		0 －130

Δ Dmp Deviation of mean outside diameter in a single plane								Kea Radial runout of outer ring of assembled bearing (Maximum)
Class 0		Class 6		Class 5		Class 4		Class 0	Class 6	Class 5	Class 4
High	Low	High	Low	High	Low	High	Low
0	－8	0	－7	0	－5	0	－4	15	8	5	4

PRODUCT FILTERS AND TABLE

Features of NUKR series cam followers

Benefits of NUKR series cam followers

Stud, outer ring and rollers

Cages

Seals

Lubricants

Other components

Bearing tolerances and clearances

Fit:

C&H BEARING WEBSITE

Nominal		h7Ⓔ		h9Ⓔ		h10Ⓔ		h12Ⓔ		F6Ⓔ
dimension		Deviations		Deviations		Deviations		Deviations		Deviations
>	≤	U	L	U	L	U	L	U	L	U	L
mm		μm		μm		μm		μm		μm

3	6	0	–12	–	–	–	–	–	–	–	–
6	10	0	–15	0	–36	–	–	–	–	22	13
10	18	0	–18	0	–43	–	–	0	–180	27	16

18	30	0	–21	0	–52	–	–	0	–210	33	20
30	50	–	–	0	–62	–	–	0	–250	41	25
50	80	–	–	–	–	–	–	–	–	49	30

120	180	–	–	–	–	0	–160	–	–	–	–
180	250	–	–	–	–	0	–185	–	–	–	–
250	315	–	–	–	–	0	–210	–	–	–	–

D Nominal outside diameter of outer ring mm		Δ Dmp Deviation of mean outside diameter in a single plane		VDsp Variation of outside diameter in a single plane (Maximum)	VDmp Variation of mean outside diameter (Maximum)	Kea Radial runout of outer ring of assembled bearing (Maximum)
Over	Incl.	High	Low		VDmp Variation of mean outside diameter (Maximum)
6	18	0	－ 8	10	6	15
18	30	0	－ 9	12	7	15
30	50	0	－11	14	8	20
50	80	0	－13	16	10	25
80	120	0	－15	19	11	35

Identiﬁcation number				Radial internal clearance
Miniature Type Cam Followers CFS	Standard Type Cam Followers (1)	Cylindrical Roller Cam Followers	Inch Series Cam Followers	Min.	Max.
CFS1.4 to CFS5	KR 10 to KR 13	－	CF1/2N,1/2,9/16; CFH1/2,9/16	3	17
CFS6	KR 16	－	CF5/8N, 5/8, 11/16; CFH5/8,11/16	5	20
－	KR 19 to KR 32	－	CF3/4 to 1-3/8; CFH3/4 to 1-3/8	5	25
－	KR 35 to KR 52	－	CF1/2 to 2-1/4; CFH1/2 to 2-1/4	10	30
－	KR 62 to KR 90	－	CF3; CFH2-1/2 to 3-1/2	10	40
－	－	－	CFH4	15	50
－	－	NUKR35 to NUKR62	PWKR35 to PWKR62	20	45
－	－	NUKR72 to NUKR90	PWKR72 to PWKR90	25	50

Model of bearing	Tolerance class of mounting hole for stud
Miniature Type Cam Followers CFS	H6
Standard Type Cam Followers (1)	H7
Inch Series Cam Followers	F7

Classiﬁcation of diameter mm		F7		H6		H7
Over	Incl.	High	Low	High	Low	High	Low
－	3	＋16	＋ 6	＋ 6	0	＋10	0
3	6	＋22	＋10	＋ 8	0	＋12	0
6	10	＋28	＋13	＋ 9	0	＋15	0
10	18	＋34	＋16	＋11	0	＋18	0
18	30	＋41	＋20	＋13	0	＋21	0
30 40	40 50	＋50	＋25	＋16	0	＋25	0

PRODUCT FILTERS AND TABLE

Features of NUKR series cam followers

Benefits of NUKR series cam followers

Stud, outer ring and rollers

Cages

Seals

Lubricants

Other components

Bearing tolerances and clearances

Fit:

Accuracy

FILTERS

Roller diameter (mm)

Stud diameter (mm)

Overall width (mm)

Outer ring width (mm)

Outer ring profile

Roller guide

Stud type

Sealing type

Designation

Interchange Code

C&H BEARING WEBSITE