Sealing nuts and screws
■ Seals in the thread and below the nut
■ One-piece element, no extra assembly required
SEAL LOCK? sealing nuts
An effective seal on bolt-nut fasteners
Two problems
■ Seal the lock nuts on the adjusting screws of hydraulic components and drives
■ Seal the stud bolt nuts on automotive engines where the stud bolt bores are used as oilways
A complete solution for both problems:
■ A leak-proof seal below the nut and in the screw thread
■ High-strength threaded fastening without loss of screw tension
■ Repeated assembly
Advantages with SEAL LOCK? sealing nuts with integrated seal ring
■ One-piece element
■ Captive seal ring
■ Effective seal against gas and liquids below the nut and in the screw thread*
■ Temperature resistance from -40° C to 110° C
■ High torque metal mating surface, seal ring does not cause loss of screw tension
■ Secure screw fastening thanks to threading in seal ring
■ Five repeat screwing-unscrewing cycles possible
■ Integrated Polyamide PA11 seal ring providing an ef- fective seal against gas and fluids
■ Compact element, low space requirement
■ Available in M6 to M16 thread sizes, coarse-pitch and fine-pitch, other sizes and special applications available on request
■ Captive seal ring, no more lost parts
Disadvantages
■ Many components a Cap nut
b Seal washer 1
c Lock nut
d Seal washer 2
■ Longer assembly times
■ Torque loss caused by seal washer 2
■ Bulky, high space requirement
* Test conditions: hydraulic oil, ISO viscosity VG 10 at 250 bar and t = 20°C.
SEAL LOCK? sealing screws
The advantages at a glance:
■ Effective seal against fluid and gas
■ Secure, captive fastener
■ Thermal stability from -40° C to 110° C
■ Galvanised surface finish also available
■ Full tightening torque, no setting required
■ One-piece element, quicker to install
■ Suitable for automated feed and installation
■ Range of versions, materials and special versions available
SEAL LOCK? sealing screws provide a cost-effective solution to the age-old problem of finding an effective seal on screw fasteners. For a long time the conventional solution to this problem has involved extra machining of the ma- ting surfaces under the head, the use of sealing compound, O-rings and other expensive operations on the part to be sealed.
The SEAL LOCK? sealing screw provides leading design engineers with a one-piece assembly fastener. The screw provides an effective seal against gas and fluids even under high pressure and can be tightened and unscrewed for up to a maximum of five times.
SEAL LOCK? sealing screws consist of metal screws of various property classes with the integrated seal ring cap- tured under the head. The seal ring is made from soft Polyamide 11 resistant to oils and solvents.
You tighten the SEAL LOCK? sealing screw just like you would any other screw. As you tighten the screw, the seal ring is pressed under high pressure into the 90∞ countersink and against the walls of the through bore. This creates a secure, effective seal between the metal mating surfaces. This means that you can dispense with the re-
tightening normally required on screw fasteners where separate seals or spring washers are used. No more re-tightening required.
SEAL LOCK? sealing screws are ideal for use in series production. We can supply SEAL LOCK? sealing screws de- signed for your operating conditions, design specifications and application. The standard SEAL LOCK? sealing screw is available in sizes ranging from M6 to M16 and fine-pitch sizes can also be supplied.
Our Technical Advisory Service will be glad to help you with you particular application. The Technical Advisory Ser- vice has a wealth of experience and will be glad to show you samples. All this without any obligation on your part. We are always glad to help.
Example applications
■ Securing of anchor set screws for electro-magnetic hydraulic valves
■ Lock nuts on the tie rods of hydraulic valve blocks
■ Locking set screws on steering boxes
詳情訪問： 429-SEAL_LOCK密封螺母.pdf
