Effective length calculator

Our plug-in torque wrenches are truly versatile thanks to the range of over 100 insert tools available. Setting the required torque value can sometimes be complicated if you have to calculate everything yourself. Fortunately, our applications consultant will take care of the calculations for you…

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Effective lengths for (other) insert tools

MDE = Torque to be set
MDV = Prescribed torque
lj = Standard adjustment length with adjustment tool
l1 = Effective length of the torque spanner
l2 = Gauge dimension of the adjustment tool
lw = gauge dimension of the insert tool

Formula: Torque correction factor for effective length change

HAZET torque spanners are adjusted / calibrated with the "l2 insertion dimensions".

If other insert tools are used, the formula must be observed!

Dimensions of the various HAZET torque spanners:

HAZET No.	l1 mm	Adjusted with	l2 mm
5280-3 CT	172	6401-1(S)	19,5
5290-3 CT	245	6402-1(S)	30
5292-3 CT	422	6404-1(S)	38,5

HAZET No.	l1 mm	Adjusted with	l2 mm
6280-1 CT	140	6401-1(S)	19,5
6281-2 CT	99	6401N	17,5
6282-1 CT	200	6401-1(S)	19,5
6290-1 CT	245	6402-1(S)	30
6291-1 CT	330	6404-1(S)	38,5
6291-2 CT	312.0	6402-1(S)	30
6292-1 CT	432.0	6404-1(S)	38,5
6293-1 CT	547.0	6404-1(S)	38,5
6294-1 CT	649.2	6406	44
6295-1 CT	893.2	6406	44

HAZET No.	l1 mm
6391-10 (V)	102
6391-12 (V)	102
6391-25 (V)	143
6391-35 (V)	143
6391- 50 (V)	201
6391- 85 (V)	276
6392-200 (V)	359
6392-320 (V)	589

Conventional application

Insert reversible ratchet 6602-1 ∙ 6604-1

Ratcheting insert box-end wrench 6606D

Tightening torques for screws by strength class

... for standard threads
Thread size	Wrench size	Insert tools			Preload force (kN)						Tightening torque (Nm)
					Strength class						Strength class
					4.6	5.6	6.8	8.8	10.9	12.9	4.6	5.6	6.8	8.8	10.9	12.9
M 2 x 0.40	4	-	-	-	0,338	0,422	0,675	0,901	1,267	1,52	0,13	0,163	0,261	0,348	0,489	0,587
M 3 x 0.50	5,5	-	-	-	0,845	1,056	1,689	2,253	3,168	3,801	0,48	0,6	0,961	1,281	1,801	2,161
M 4 x 0.70	7	9x12	-	-	1,463	1,829	2,927	3,902	5,487	6,585	1,115	1,393	2,229	2,972	4,18	5,016
M 5 x 0.80	8	9x12	-	-	2,395	2,994	4,79	6,387	8,982	10,778	2,261	2,827	4,523	6,03	8,48	10,176
M 6 x 1.00	10	9x12	-	-	3,379	4,224	6,758	9,011	12,671	15,205	3,843	4,803	7,685	10,247	14,41	17,292
M 8 x 1.25	13	9x12	14x18	-	6,202	7,753	12,404	16,539	23,258	27,909	9,349	11,686	18,698	24,931	35,059	42,07
M 10 x 1.50	17	9x12	14x18	-	9,876	12,345	19,752	26,336	37,034	44,441	18,54	23,18	37,09	49,45	69,54	83,44
M 12 x 1.75	19	9x12	14x18	-	14,4	18	28,801	38,401	54,001	64,801	32,37	40,46	64,74	86,32	121,38	145,66
M 14 x 2.00	22	-	14x18	-	19,775	24,719	39,551	52,734	74,158	88,989	51,77	64,71	103,54	138,06	194,14	232,97
M 16 x 2.00	24	-	14x18	-	27,221	34,027	54,443	72,591	102,08	122,497	80,62	100,77	161,24	214,98	302,32	362,78
M 18 x 2.50	27	-	14x18	-	33,078	41,347	66,155	88,207	124,041	148,85	111,09	138,86	222,17	296,23	416,58	499,89
M 20 x 2.50	30	-	14x18	-	42,534	53,167	85,067	113,423	159,501	191,401	157,46	196,82	314,91	419,88	590,46	708,55
M 22 x 2.50	32	-	14x18	21/26	53,175	66,469	106,35	141,8	199,406	239,288	215,1	268,9	430,2	573,7	806,7	968
M 24 x 3.00	36	-	14x18	21/26	61,248	76,56	122,497	163,329	229,681	275,617	272,1	340,1	544,2	725,6	1020,3	1224,4
M 27 x 3.00	41	-	14x18	21/26	80,67	100,837	161,339	215,119	302,512	363,014	399,9	499,9	799,9	1066,5	1499,7	1799,7
M 30 x 3.50	46	-	-	21/26	98,027	122,533	196,054	261,405	367,6	441,12	541,7	677,2	1083,4	1444,6	2031,5	2437,7
M 33 x 3.50	50	-	-	-	122,241	152,801	244,482	325,976	458,404	550,084	738,5	923,2	1477,1	1969,4	2769,5	3323,4
M 36 x 4.00	55	-	-	-	143,413	179,266	286,826	382,434	537,798	645,358	948	1185	1896	2528	3555	4265,9
M 39 x 4.00	60	-	-	-	172,42	215,525	344,839	459,786	646,574	775,888	1229	1536	2457	3276	4607	5529
M 42 x 4.50	65	-	-	-	197,407	246,758	394,813	526,417	740,275	888,329	1519	1899	3038	4050	5696	6835
M 45 x 4.50	70	-	-	-	231,206	289,007	462,412	616,549	867,022	1040,426	1898	2373	3796	5062	7118	8541
M 48 x 5.00	75	-	-	-	280,008	325,01	520,015	693,354	975,029	1170,035	2282	2853	4565	6086	8559	10271
M 52 x 5.00	80	-	-	-	312,056	390,07	624,112	832,149	1170,209	1404,251	2954	3692	5907	7876	11076	13292
M 56 x 5.50	85	-	-	-	359,843	449,804	719,689	959,581	1349,411	1619,293	3672	4591	7345	9793	13772	16526
M 60 x 5.50	90	-	-	-	420,651	525,813	841,301	1121,735	1577,44	1892,928	4582	5728	9164	12219	17183	20619
M 64 x 6.00	95	-	-	-	475,86	594,825	951,72	1268,96	1784,476	2141,371	5536	6920	11071	14762	20759	24911
M 68 x 6.00	100	-	-	-	545,427	681,784	1090,855	1454,473	2045,353	2454,423	6720	8400	13440	17919	25199	30239

...for fine threads
Thread size	Wrench size	Insert tools			Preload force (kN)						Tightening torque (Nm)
					Strength class						Strength class
					4.6	5.6	6.8	8.8	10.9	12.9	4.6	5.6	6.8	8.8	10.9	12.9
M 8 x 1.00	13	9x12	14x18	-	6,805	8,507	13,611	18,148	25,52	30,624	10,08	12,6	20,15	26,87	37,79	45,35
M 10 x 1.25	17	9x12	14x18	-	11,418	14,272	22,835	30,447	42,816	51,379	20,83	26,04	41,66	55,55	78,11	93,73
M 12 x 1.50	19	9x12	14x18	-	15,312	19,14	30,624	40,832	57,42	68,904	34,01	42,51	68,02	90,69	127,54	153,05
M 14 x 1.50	22	-	14x18	-	21,934	27,418	43,868	58,491	82,253	98,703	56,25	70,32	112,51	150,01	210,96	253,15
M 16 x 1.50	24	-	14x18	-	29,741	37,177	59,483	79,31	111,53	133,836	86,5	108,12	172,99	230,66	324,36	389,23
M 18 x 1.50	27	-	14x18	-	38,733	48,417	77,467	103,289	145,25	174,3	125,95	157,44	251,91	335,88	472,33	566,8
M 20 x 1.50	30	-	14x18	-	48,91	61,138	97,82	130,427	183,413	220,096	175,9	219,8	351,7	468,9	659,4	791,3
M 22 x 1.50	32	-	14x18	21/26	60,272	75,34	120,543	160,724	226,019	271,223	237,4	296,8	474,8	633,1	890,3	890,3
M 24 x 2.00	36	-	14x18	21/26	72,818	91,022	145,635	194,18	273,066	327,68	311,8	389,8	623,7	831,6	1169,4	1403,3

_{The specified tightening torques are guide values}
_{All data without guarantee}

Effective length calculator

Design (product type)

Output

Drive

Wrench size

Head Width b

Head Thickness a

Standard

Inside micrometre of the adjusting tool l2

Article type