Hydraulic nuts

Mounting bearings on tapered seatings can be a difficult and time-consuming job. Using an SKF Hydraulic Nut facilitates easy and quick application of the high drive-up forces required for mounting bearings. Dismounting bearings mounted on either adapter or withdrawal sleeves is also often a difficult and time-consuming job. These problems can be reduced with the use of an SKF Hydraulic Nut. Oil is pumped into the nut and the piston is pushed out with a force, which is sufficient to free the sleeve. All SKF HMV ..E nuts are supplied with a quick connection coupling to fit the SKF hydraulic pumps.

Wide size range, covering shaft diameters from 50 to 1 000 mm as standard

Full range of inch threads available, series HMVC ..E from 1.967 up to 37.410 in.

Quick connection coupling can be fitted on the face or side of the nut, allowing the nut to be used in areas where space is limited

A spare set of piston seals and maintenance kit is supplied as standard

To assist nut threading, a tube of lubricant is supplied with all nuts of size HMV(C) 54E and larger

To facilitate easy nut threading, all nuts from size HMV(C) 54E are equipped with two tommy bars and four mating holes on their front face

Nuts from size HMV(C) 94E are equipped with eyebolts, allowing easy handling

Nuts from size HMV(C) 94E have the starting position of the thread indicated, facilitating easy matching of thread positions on both the nut and mating thread

Special threads and sizes available on request

Maximum working oil pressure with permitted piston displacement of HMV(C)…E nuts:

HMV(C) 60E and smaller: 80 MPa (11 600 psi)

HMV(C) 62-100E: 40 MPa (5 800 psi)

HMV(C) 102E and larger: 25 MPa (3 600 psi)

HMV ..E nut for driving the bearing onto a tapered seating (fig 1) 

HMV ..E nut screwed onto the shaft for driving in a withdrawal sleeve

(fig 2) 

HMV ..E nut for driving the bearing onto an adapter sleeve (fig 3) 

HMV ..E nut and special stop nut for driving in a withdrawal sleeve (fig 4)

HMV ..E nut and stop ring in position to press an adapter sleeve free

(fig 5) 

HMV ..E nut used to free a withdrawal sleeve (fig 6)

Technical data
Thread form
HMV 10E – HMV 40E	ISO 965/111-1980 tolerance class 6H
HMV 41E – HMV 200E	ISO 2901-1977 tolerance class 7H

 

Table with dimensions of hydraulic nuts with metric threads HMV E series.

Technical data
Thread form
HMVC 10E – HMVC 64E	American National Form Threads Class 3
HMVC 68E – HMVC 190E	ACME General Purpose Threads Class 3 G

 

Table with dimensions of hydraulic nuts with inch threads HMVC E series

The SKF Drive-up Method is the preferred method for mounting spherical roller and CARB bearings on tapered seatings. In conjunction with a SKF dial indicator, the adapter HMVA 42/200 allows the previous generation of HMV nuts to be used with the SKF Drive-up Method. The adapter can be used with nuts from size HMV(C) 42 to HMV(C) 200.

One adapter suits previous generation nuts from HMV(C) 42-200

Rugged construction

Easy to attach to the HMV nut using strong magnets

Used in conjunction with SKF dial indicators

Note: The adapter kit is not required for the current generation of HMV(C)…E hydraulic nuts.