STO12X

Support roller (yoke-type track roller), without flange rings, STO12X, NAST 12, NAB201X

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DIMENSIONS

D	32 mm	Outside diameter
d	12 mm	Bore diameter
B	12 mm	Width inner ring
C	11.8 mm	Width outer ring
E	22 mm	Raceway diameter outer ring
F	16 mm	Raceway diameter inner ring
r _min	0.3 mm	Chamfer dimension outer ring
r₁ _min	0.3 mm	Chamfer dimension inner ring

LOAD RATINGS

C	8.8 kN	Basic dynamic load rating
C₀	9.8 kN	Basic static load rating
P_u	1.18 kN	Fatigue load limit
F_r	8.3 kN	Maximum dynamic radial load
F_0r	12 kN	Maximum static radial load

LIMITING SPEED

ⁿD G

4500 r/min

Limiting speed

WEIGHT

≈m

0.057 kg

Weight

OPERATING TEMPERATURE

	-30 ºC to +120 ºC	Temperature range °C
	-22 ºF to +250 ºF	Temperature range °F

FEATURES

	Cylindrical	Outer ring profile
	Needle rollers	Rolling elements
	1	Number of rows
	Without	Axial guidance of outer ring
	GCr15 (52100, 100Cr6)	Ring and roller material
	Sheet steel	Cage material
	Open	Sealing type
	Lithium Soap Grease NLGI #2	Grease
	With	Re-lubrication

TOLERANCES AND CLEARANCES

	P0(ABEC-1)	Tolerance class
	CN	Radial internal clearance

INA	SKF	IKO/THK	NTN	Koyo-Torrington
STO12X	STO 12 X	NAST 12	NAB201X	STO12DZ

Tolerance and Clearance

Bearing tolerances and clearances

Tolerances: Normal, Other,
Radial Internal clearance: Needle roller bearing

ISO CERTIFICATE

ABOUT US

SOCIAL MEDIAS

MOBILE APPS

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.

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	–	–	–	–

Bore diameter		Radial internal clearance
d		C2		Normal		C3		C4
>	≤	min.	max.	min.	max.	min.	max.	min.	max.
mm		µm

–	30	0	25	20	45	35	60	50	75
30	40	5	30	25	50	45	70	60	85
40	50	5	35	30	60	50	80	70	100

50	65	10	40	40	70	60	90	80	100
65	80	10	45	40	75	65	100	90	125
80	100	15	50	50	85	75	110	105	140

100	120	15	55	50	90	85	125	125	165
120	140	15	60	60	105	100	145	145	190
140	160	20	70	70	120	115	165	165	215

160	180	25	75	75	125	120	170	170	220
180	200	35	90	90	145	140	195	195	250
200	225	45	105	105	165	160	220	220	280

225	250	45	110	110	175	170	235	235	300
250	280	55	125	125	195	190	260	260	330
280	315	55	130	130	205	200	275	275	350

315	355	65	145	145	225	225	305	305	385
355	400	100	190	190	280	280	370	370	460

STO12X

TECHNICAL INFORMATION

INTERCHANGE CODE TABLE

Tolerance and Clearance

C&H BEARING WEBSITE