Tapered roller bearing 31307 Dimensional series ISO 355: 7FB

Designation	Dimension	Remark
d	35.00 mm	shaft diameter
D	80.00 mm	outer diameter
T	22.75 mm	width
B	21.00 mm	inner ring width
C	15.00 mm	outer ring width
a	25.00 mm	Distance to the pressure point
d₁	59.60 mm	inner ring shoulder diameter
r_{1 min.}	2.00 mm	min. edge distance
r_{2 min.}	2.00 mm	min. edge distance
r_{3 min.}	1.50 mm	min. edge distance
r_{4 min.}	1.50 mm	min. edge distance
d_{a max.}	45.00 mm	diameter of the shaft contact surface
d_{b min.}	44.00 mm	diameter of the shaft contact surface
D_{a min.}	62.00 mm	Diameter of the contact surface in the housing
D_{a max.}	71.00 mm	Diameter of the contact surface in the housing
C_{a min.}	3.00 mm
C_{a min.}	7.50 mm
r_{a max.}	2.00 mm	rounding radius
r_{a max.}	1.50 mm	rounding radius

Designation	Dimension	Remark
C_r	71,000 N	dynamic load rating, radial
C_0r	67,000 N	static load rating, radial
n_G	8,500 min^-1	limit speed
n_R	6,300 min^-1	reference speed
	0.520 kg	Weight

Designation	Dimension							Connection dimensions									Performance data
	d	D	T	B	C	a	d₁	d_{a max}	d_{b min}	D_{a min}	D_{a max}	D_{b min}	C_{a min}	C_{b min}	r_{a max}	r_{b max}	C_r	C_0r	P_ur	n_B	n_G
	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	kN	kN	kN	min^-1	min^-1
31305	25.00	62.00	18.25	17.00	13.00	20.00	45.80	34.00	32.00	47.00	55.00	59.00	3.00	5.00	1.50	1.50	38,000	40,000	4,400	7,500	11,000
31306	30.00	72.00	20.75	19.00	14.00	22.00	52.70	40.00	37.00	55.00	65.00	68.00	3.00	6.50	1.50	1.50	55,000	50,000	5,700	7,500	9,500
31307	35.00	80.00	22.75	21.00	15.00	25.00	59.60	45.00	44.00	62.00	71.00	76.00	3.00	7.50	2.00	1.50	71,000	67,000	7,800	6,300	8,500
31308	40.00	90.00	25.25	23.00	17.00	28.00	67.10	51.00	49.00	71.00	81.00	86.00	3.00	8.00	2.00	1.50	85,000	81,500	9,500	5,600	7,500
31309	45.00	100.00	27.25	25.00	18.00	31.00	74.70	57.00	53.00	79.00	91.00	95.00	4.00	9.00	2.00	1.50	106,000	102,000	12,500	5,000	6,700
31310	50.00	110.00	29.25	27.00	19.00	34.00	81.50	62.00	60.00	87.00	100.00	104.00	4.00	10.00	2.00	2.00	122,000	120,000	14,300	4,500	6,000
31311	55.00	120.00	31.50	29.00	21.00	37.00	88.40	68.00	65.00	94.00	112.00	113.00	4.00	10.50	2.00	2.00	140,000	137,000	16,600	4,300	5,600
31312	60.00	130.00	33.50	31.00	22.00	39.00	95.90	74.00	72.00	103.00	118.00	123.00	5.00	11.50	2.50	2.00	166,000	166,000	20,400	3,800	5,300
31313	65.00	140.00	36.00	33.00	23.00	42.00	103.00	80.00	77.00	111.00	128.00	132.00	5.00	13.00	2.50	2.00	190,000	193,000	23,600	3,600	4,800
31314	70.00	150.00	38.00	35.00	25.00	45.00	110.00	85.00	82.00	118.00	138.00	141.00	5.00	13.00	2.50	2.00	216,000	220,000	27,000	3,400	4,500
31315	75.00	160.00	40.00	37.00	26.00	48.00	116.00	91.00	87.00	127.00	148.00	151.00	6.00	14.00	2.50	2.00	240,000	245,000	29,000	3,200	4,300
31316	80.00	170.00	42.50	39.00	27.00	52.00	124.00	97.00	92.00	134.00	158.00	159.00	6.00	15.50	2.50	2.00	260,000	265,000	32,000	3,000	4,000
31317	85.00	180.00	44.50	41.00	28.00	55.00	131.00	103.00	99.00	143.00	166.00	169.00	6.00	16.50	3.00	2.50	242,000	285,000	33,500	2,600	3,800
31318	90.00	190.00	46.50	43.00	30.00	57.00	138.00	109.00	105.00	151.00	176.00	179.00	5.00	16.50	3.00	2.50	264,000	315,000	36,500	2,400	3,400
31319	95.00	200.00	49.50	45.00	32.00	60.00	145.00	114.00	110.00	157.00	186.00	187.00	5.00	17.50	3.00	2.50	292,000	355,000	39,000	2,400	3,400
31320X	100.00	215.00	56.50	51.00	35.00	65.00	158.00	121.00	115.00	168.00	201.00	202.00	7.00	21.50	3.00	2.50	430,000	465,000	51,000	2,400	3,000
31322X	110.00	240.00	63.00	57.00	38.00	72.00	176.00	135.00	125.00	188.00	226.00	224.00	7.00	25.00	3.00	2.50	457,000	585,000	62,000	1,900	2,800
31324X	120.00	260.00	68.00	62.00	42.00	78.00	190.00	145.00	135.00	203.00	245.00	244.00	9.00	26.00	3.00	2.50	539,000	695,000	73,500	1,700	2,400
31326X	130.00	280.00	72.00	66.00	44.00	84.00	204.00	157.00	150.00	218.00	263.00	261.00	8.00	28.00	4.00	3.00	605,000	780,000	81,500	1,600	2,400
31328X	140.00	300.00	77.00	70.00	47.00	90.00	219.00	169.00	160.00	235.00	283.00	280.00	9.00	30.00	4.00	3.00	693,000	900,000	88,000	1,500	2,200
31330X	150.00	320.00	82.00	75.00	50.00	96.00	234.00	181.00	170.00	251.00	303.00	-	9.00	32.00	4.00	3.00	781,000	1,020,000	100,000	1,400	2,000

Designation	Dimension							Connection dimensions									Performance data
	d	D	T	B	C	a	d₁	d_{a max}	d_{b min}	D_{a min}	D_{a max}	D_{b min}	C_{a min}	C_{b min}	r_{a max}	r_{b max}	C_r	C_0r	P_ur	n_B	n_G
	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	kN	kN	kN	min^-1	min^-1
31307	35.00	80.00	22.75	21.00	15.00	25.00	59.60	45.00	44.00	62.00	71.00	76.00	3.00	7.50	2.00	1.50	71,000	67,000	7,800	6,300	8,500

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Name	Brand	Webshop	Notice
31307	HFH		Premium quality, house brand
31307	DIV		cheap alternative

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