A 1/2" diameter 10 TPI, 2 start valve
stem and mating flange for a valve used in a system for carefully
controlled atmosphere. H & R made the tap for the flange and
has furnished the precision ground operating screw to a customer
on the East Coast for many years.
ACME THREAD SCREWS & NUTS Economical cut Acme Threads
are machined on our precision Landis Threading Machines from
3/8" to 4" diameter and up to 20 ft. long. Ground Acme Threads
from 3/16" to 4" diameter and up to 36 in. long. Experience
and extensive tooling enables us to provide all standard threads,
left and right hand, multiple start, as well as many specials.
H & R's work with Acme Threads began just
after WW II with a request from the Bereau of Reclamation.
A massive irrigation project was underway and they required
a specialized valve stem. Custom Acme Thread threading dies
were designed by H & R and special taps for the matching
handwheels. Over several years, through the completion of
the project, thousands were produced.
H & R continues to be responsive to clients' special requirements,
solving problems with quality parts.