Complete Line of Press Fit Fasteners by Driv-Lok, Inc.More catalogs by Driv-Lok, Inc. | 14 pages
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DRIV-LOK is the preferred source of
innovative, cost effective solutions for our
customers who need press fit fastening,
joining and special component applications.
DRIV-LOK provides the highest quality,
superior customer service, shortest lead
times, and unequaled technical assistance
through a team of dedicated professionals.
1. Uncompromising integrity and pride in everything we do.
2. Nurture an environment of harmony and teamwork
throughout the corporation.
3. Commitment to helping all team members strive to be the
best they can be.
4. Dedication to provide our customers the highest quality
workmanship and value.
5. Intense desire for continuous improvement and elimination
6. A resolve to create a safe, friendly, and fun atmosphere
where teamwork and creativity are valued.
OVER 60 YEARS OF SOLUTION RESOLUTION IN THE
PRESS FIT FASTENER INDUSTRY
Whatever we call the major DRIV-LOK products, grooved pins, knurled pins|
Grooved Pins (cont.)
GROOVED PIN DRILLING PROCEDURES AND HOLE TOLERANCES
Insertion and holding forces vary with hole size and groove
length. Recommended hole size tolerances are based on a groove
length to hole diameter ratio of approximately 5 to 1. A higher
ratio than 5 to 1 may require adjustment in hole size. If the ratio
is 1 to 1 or less then the hole tolerance should be reduced
approximately 60%. Smaller hole size variation should result in
more consistent insertion forces. These factors should be
considered when designing press fit fasteners for your
Hole sizes should never be smaller than the nominal diameter of
the grooved pin. Minimum hole size equals nominal grooved pin
diameter. Maximum hole size equals minimum hole size plus
recommended hole tolerance from the chart.
Example: 1/8 diameter pin:
Min. hole .125
Max. hole .125 .003 =.128
Grooved Machine Keys
Grooved machine keys are used in the same applications
as standard parallel machine keys where reduced backlash
and increased holding power is required. Machine keys
are pressed into keyways which are cut into a shaft and
hub assembly parallel to the axis of the shaft. Machine
keys are most commonly used in this manner to lock shaft
and hub assemblies together to transmit torque.
Type 1 grooved machine keys have grooves on one
surface where permanent assembly is not required. Type 2
grooved machine keys have grooves on two opposite
surfaces for permanent or semi-permanent assembly. The
grooves impressed in the key displace metal which
expands the width to provide positive holding action. This
eliminates costly drilling and tapping for set screws or
other additional processes which would be required to
hold the pin in place.
Most square keys are available with 45 chamfers at both
ends for easy insertion and elimination|
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