ASME B5.11 Spindle noses and adjust able adapters for multiple spindle drilling heads

THIS standard for Adjustable Adapters for Multiple Spindle Drilling Heads was developed
by Sectional Committee B5 on the Standardization of Small Tools and Machine
Tool Elements, organized September, 1922, under procedure of the American Standards
Association and is sponsored by the National Machine Tool Builders' Association, the
Society of Automotive Engineers, American Society of Tool and Manufacturing Engineers,
and The American Society of Mechanical Engineers.
On December 2, 1937, this standard was approved by the American Standards Association
and designated as Ameriqm Standard (ASA B5.11-1937).
Subsequent to a request from the sponsor organizations for a revision of the standard, a
new technical committee was appointed on September 24, 1947, to review and make recommendations
for revision.
In August, 1953, at the request of the sponsors, the technical committee was authorized
to include the standardization of spindle noses for use with adjustable adapters. With the
inclusion of spindle noses, the title of the project was changed to Spindle Noses and
Adjustable Adapters for Multiple Spindle Drilling Heads.
A draft dated December 1, 1953, was approved by Technical Committee No. 18 and in
February, 1954, the proposal was presented to the members of Sectional Committee B5 for
letter ballot vote.
Following approval of the sectional committee and sponsor organizations, the proposal
was submitted to the American Standards Association for approval and designation as
American Standard. This was granted on August 18, 1954, and it was designated as American
Standard (ASA B5.11-1954).
In 1959 the committee was reactivated for the purpose of the regular five-year review.
Concurrently with the review by committee, a request was received from ASTME Chapter
No. 5 of Chicago, Illinois to extend the standard to smaller sizes of adjustable adapters.
We acknowledge the help and suggestions received from them.
In a meeting in 1962 it was agreed to consider the subject of the smaller size adapters
as a separate standard, both to expedite the issuance of the existing standard for approval
of revisions, and also because the physical construction of the smaller sizes had
to depart from that of the larger sizes.
The revised standard was submitted to B5 Sectional Committee for letter ballot on
December 14, 1962. Following approval by the Sectional Committee and the sponsors,
the standard was approved by ASA on June 10, 1964 and designated as American Standard
(ASA B5.11-1964).