Bush Hog 280 manual Torque Specifications, American

TORQUE SPECIFICATIONS

	Proper toque for American fasteners used on Bush Hog equipment.
	Recommended Torque in Foot Pounds (Newton Meters).*
AMERICAN
Bolt Head Markings		BOLT DIAMETER
	WRENCH	(IN.) “B” AND	SAE	SAE	SAE
	SIZE (IN.) “A”	THREAD SIZE	GRADE 2	GRADE 5	GRADE 8

SAE Grade 2

(No Dashes)

SAE Grade 5

(3 Dashes)

Bolt	“B”
Diameter

Wrench

Size “A”SAE Grade 8 (6 Dashes)

7/16	1/4 - 2O UNC	6	(7)	8 (11)		12	(16)
7/16	1/4 - 28 UNF	6	(8)	10	(13)	14	(18)
1/2	5/16 - 18 UNC	11	(15)	17	(23)	25	(33)
1/2	5/16 - 24 UNF	13	(17)	19	(26)	27	(37)
9/16	3/8 - 16 UNC	20	(27)	31	(42)	44	(60)
9/16	3/8 - 24 UNF	23	(31)	35	(47)	49	(66)
5/8	7/16 - 14 UNC	32	(43)	49	(66)	70	(95)
5/8	7/16 - 20 UNF	36	(49)	55	(75)	78 (106)
3/4	1/2 - 13 UNC	49	(66)	76 (103)		106	(144)
3/4	1/2 - 20 UNF	55	(75)	85 (115)		120	(163)
7/8	9/16 - 12 UNC	70	(95)	109	(148)	153	(207)
7/8	9/16 - 18 UNF	79 (107)		122	(165)	172	(233)
15/16	5/8 - 11 UNC	97 (131)		150	(203)	212	(287)
15/16	5/8 - 18 UNF	110	(149)	170	(230)	240	(325)
1-1/8	3/4 - 10 UNC	144	(195)	266	(360)	376	(509)
1-1/8	3/4 - 16 UNF	192	(260)	297	(402)	420	(569)
1-5/16	7/8 - 9 UNC	166	(225)	430	(583)	606	(821)
1-5/16	7/8 - 14 UNF	184	(249)	474	(642)	668	(905)
1-1/2	1 - 8 UNC	250	(339)	644	(873)	909 (1232)
1-1/2	1 - 12 UNF	274	(371)	705	(955)	995 (1348)
1-1/2	1 - 14 UNF	280	(379)	721	(977)	1019	(1381)
1-11/16	1-1/8 - 7 UNC	354	(480)	795 (1077)		1288(1745)
1-11/16	1-1/8 - 12 UNF	397	(538)	890 (1206)		1444	(1957)
1-7/8	1-1/4 - 7 UNC	500	(678)	1120	(1518)	1817	(2462)
1-7/8	1-1/4 - 12 UNF	553	(749)	1241	(1682)	2013	(2728)
2-1/16	1-3/8 - 6 UNC	655	(887)	1470	(1992)	2382	(3228)
2-1/16	1-3/8 - 12 UNF	746 (1011)		1672	(2266)	2712	(3675)
2-1/4	1-1/2 - 6 UNC	870 (1179)		1950	(2642)	3161	(4283)
2-1/4	1-1/2 - 12 UNF	979 (1327)		2194	(2973)	3557	(4820)

METRIC

Wrench

Size “A” 8.8

Bolt	“B”
Diameter

Proper torque for metric fasteners used on Bush Hog equipment.

Recommended torque in foot pounds (newton Meters).*

WRENCH	BOLT
SIZE	DIA.	ASTM		ASTM	ASTM		ASTM
(mm) “A”	(mm) “B”	4.6		8.8	9.8		10.9
8	5	1.8	(2.4)		5.1	(6.9)	6.5	(8.8)
10	6	3	(4)		8.7 (12)		11.1 (15)
13	8	7.3 (10)			21.1 (29)		27	(37)
16	10	14.5 (20)			42	(57)	53	(72)
18	12	25	(34)	74 (100)	73	(99)	93 (126)
21	14	40	(54)	118 (160)	116	(157)	148	(201)

Numbers appearing on bolt heads indicate ASTM class.

*Use 75% of the specified torque value for plated fasteners. Use 85% of the specificed torque values for lubricated fasteners.

24	16	62	(84)	167	(226)	181 (245)	230	(312)
30	20	122	(165)	325	(440)		449	(608)
33	22			443	(600)		611	(828)
36	24	211	(286)	563	(763)		778 (1054)
41	27			821 (1112)			1138	(1542)
46	30	418	(566)	1119	(1516)		1547	(2096)

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