NEW RINGFEDER LOCKING ASSEMBLY RFN 7012 - 28mm x 55mm - 990981 - FREE SHIPPING

• Slimmest design - especially suitable for applications where space is limited. The Locking Assembly RfN 7012 stainless compensates small tolerance deviations and compensates small mounting errors.
• Large transmittable forces and moments – several Locking As­sem­blies RfN 7012 stainless can be placed one behind the other. The transmissible torque and axial forces are added 
• Easy installation – in comparison to crosspress fits temperature treatments and fitting are eliminated. Locking As­sem­blies RfN 7012 stainless steel can cover a big fitting clearance.
• Low risk to contamination – during the tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination.
• Adjustable transmission values – the locking screw torque can be changed giving a corresponding change in transmission values. RfN 7012 stainless Locking As­sem­blies can be tightened and released repeatedly.
• Example applications
  

• chain wheels
• levers
• pulleys
• slip-on gear mechanisms
• belt drums
• running wheels
• cable sheaves
  Mounting of Locking Assembly
  

The Locking As­sem­blies are supplied slightly oiled and ready-to-use. The values for T, Fax, pW and pN apply to Locking As­sem­blies in delivery condition.

Tolerances

We recommend the following mounting tolerances

Shaft: k9-h9; Hub: N9-H9
Max. admissible Shaft: k11-h11; Hub: N11-H11

To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub.

Arrangement of several Locking As­sem­blies RfN 7012 stainless

If several Locking As­sem­blies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4·L.

Change of screw tightening torques

The Locking As­sem­blies are generally equipped with A2-70 grade screws. A reduction of the screw tightening torque is possible.
Auxiliary threads

To facilitate removal, the front thrust rings have auxiliary threads.