Nuts and locking devices

Nuts and locking devices

Information

Locknuts are used to install, remove and secure bearings and other machine parts. Depending on how they are used, locknuts are referred to as mounting nuts, shaft nuts or removal nuts. So-called hook spanners or impact spanners are generally used for securing or releasing purposes. Bearings are pressed onto the taper of a shaft or adapter sleeve using locknuts. The adapter sleeve can also be pulled into the tapered bearing bore. Shaft nuts are used to insert withdrawal sleeves into the tapered bearing bore. Withdrawal sleeves are dismounted by screwing a removal nut onto the sleeve thread and rotating it against the inner ring of the bearing until it slides out from the bearing. Nuts (except removal nuts) are used to secure the bearing on the taper. These in turn are secured with locking devices (MB, MBL, or MS) to prevent them from coming loose.

Locknut product codes

The product codes for locknuts start with HM or KM.

Locknuts of types KM, KML or HM, HML, and HMLL have four grooves on their outer diameter. By contrast, the HM 30.. and HM 31.. ranges have eight grooves on their outer diameter and eight thread bores for securing a locking clip.

Suffixes

Different suffixes (letters) distinguish the various locknuts within the ranges. A distinction is made between H and HS designs.

H = Locknuts with the suffix H have additional thread bores right through them. This makes it possible to mount them with additional screws.
HS = Locknuts with the suffix HS have additional thread bores right through them and come with the relevant mounting screws.

Type MB.. H mounting washers are used during mounting/dismounting with mounting screws. These mounting washers prevent the mounting screws from damaging the bearing's inner ring or the sleeve.

Open configuration options

Use of locking devices

Lock washers from the MB and MBL ranges are used to secure type KM, KML, and HM.. T locknuts. Locking clips from the MS 30.. and MS 31.. ranges are used to secure type HM 30.. and HM 31.. locknuts.

5
Bezeichnung G l (mm) D (mm)
KM 27 HS M 135x2 22 175
KM 28 M 140x2 22 180
KM 28 H M 140x2 22 180
KM 28 HS M 140x2 22 180
KM 29 M 145x2 24 190
KM 29 H M 145x2 24 190
KM 29 HS M 145x2 24 190
KM 3 M 17x1 5 28
KM 30 M 150x2 24 195
KM 30 H M 150x2 24 195
5
Bezeichnung G l (mm) D (mm)
HM 30/1500 Tr 1500x8 110 1650
HM 30/500 Tr 500x5 68 580
HM 30/500 H Tr 500x5 68 580
HM 30/500 HS Tr 500x5 68 580
HM 30/530 Tr 530x6 75 630
HM 30/530 H Tr 530x6 75 630
HM 30/530 HS Tr 530x6 75 630
HM 30/560 Tr 560x6 75 650
HM 30/560 H Tr 560x6 75 650
HM 30/560 HS Tr 560x6 75 650
5
Bezeichnung G (Inch) l (Inch) D (Inch)
N-068 13.339 1.791 15.755
N-07 1.376 0.448 2.068
N-072 14.17 1.791 16.505
N-076 14.957 1.916 17.755
N-08 1.563 0.448 2.255
N-080 15.745 2.073 18.505
N-084 16.532 2.073 19.318
N-088 17.319 2.385 20.505
N-09 1.767 0.448 2.536
N-092 18.107 2.385 21.255
5
Bezeichnung b (mm) h (mm) e (mm)
MS 31/750 60 21 70
MS 31/850 70 21 71
MS 31/900 70 21 76
MS 31/950 70 21 78
MS 3144 20 12 22.5
MS 3152 24 12 25.5
MS 3160 24 12 30.5
MS 3164 24 15 31
MS 3168 28 15 38
MS 3176 32 15 40
5
Bezeichnung d3 (mm) f (mm) d1 (mm)
MB 9 69 42.5 45
MBL 24 152 115 120
MBL 26 161 125 130
MBL 28 172 135 140
MBL 30 189 145 150
MBL 32 199 154 160
MBL 34 211 164 170
MBL 36 222 174 180
MBL 38 232 184 190
MBL 40 245 194 200
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5
Bezeichnung d3 (Inch) f (Inch) d1 (Inch)
W-36 9.438 6.91 -
W-38 9.875 7.316 7.577
W-40 10.313 7.721 7.982
W-44 11.438 8.327 8.701
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