AMETEK 950 MD Mill Duty Housing LDT - Manual (Page 7)

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1080 N. Croo ks R o ad • C laws o n, MI 48017 • 8 00-635-0289 • 248-435-0700 • Fax 24 8- 435-8120 • www.ametekapt.com
950MD
Mill-Duty Housing
Quik-Stik Mill-Duty Housing
MOUNTING CONSIDERATIONS FOR HYDRAULIC CYLINDERS
The following information is intended to aid the user in
mounting the Series 950MD to a hydraulic cylinder. The
details shown here are only guidelines; because so many
possible applications and configurations exist, it is up to
the design engineer to determine the exact mounting.
Refer to drawing on page 7 for use with references
below.
A) Hydraulic Cylinder Mounting Block - In many
instances it is not feasible to drill and tap the end cap on
cylinders. It is recommended that a tap block be welded
to the cylinder end cap. The block should be as parallel
to the front mounting surface as possible.
B) Trunnion Mount Socket Head Shoulder Screw - A
3/4" x 3-1/4" shoulder bolt is supplied for trunnion
mounting. The shoulder extends approximately 1/4" from
the trunnion mount. This extension allows for rotational
movement of the trunnion over the shoulder bolt. If a
longer distance between the trunnion mount and the
interface device is required, a longer shoulder bolt should
be used. A pipe with an I.D. slightly larger than the
shoulder bolt O.D should be placed over the shoulder bolt
between the trunnion mount and the interface device.
Leave approximately 1/4" play between the trunnion
mount and interface device to accommodate rotational
movement.
C) Barrel Support Bracket - Each Mill-Duty housing
with a stroke of 6 feet or greater is supplied with barrel
support brackets (every 6' Increment). The support
brackets operate to keep the barrel from sagging under
its own weight. The bracket is configured to support the
barrel without greatly restricting side-to-side and up/down
movement. The barrel support bracket(s) should be
mounted so that the barrel support hole is centered over
the barrel. Mounting configurations that put a force load
on the tube may affect the operation and longevity of the
unit.
D) Front Spherical Rod End - A 1/2" x 2" shoulder bolt
is provided to interface with the spherical rod end. The
rear trunnion allows for some up/down movement of the
Mill-Duty housing while the spherical rod end allows both
up/down and side-to-side movement to accommodate for
misalignment. The shoulder bolt attaches to the movable
portion of the machine that the cylinder is driving. A pipe
with an I.D. clearance for a 1/2" shoulder bolt should be
placed between the spherical rod end and the interface
surface, allowing 1/4" clearance for proper movement.
E) Rear Mount Trunnion (Spherical Rod End) – In
cases where the trunnion is to be mounted on the rear of
the Mill-Duty housing, most notably with clevis mount
cylinders, the following points should be noted; 1) A
clevis pin modification needs to be made to allow the rear
shoulder bolt to mount to It. This can be as simple as
drilling/tapping larger pins or welding a nut to the end of a
pin. 2) For best results the trunnion shoulder bolt should
be directly centered with the clevis pin. 3) With a rear
mount trunnion the Mill-Duty housing sits farther forward
on the cylinder, thus potentially putting the active stroke
of the Mill-Duty housing too far forward. Care should be
taken when mounting to prevent this situation. An
optional rear mount 3/4" spherical rod end is also
available. See drawing for mounting considerations.
F) Active Stroke/Mechanical Stroke - The Mill-Duty
housing has typically been supplied with a mechanical
stroke that is the same as the electrical active stroke of
the linear displacement transducer. It is possible to get an
additional retract and/or extend over-stroke to
accommodate cylinder over-stroke conditions. When
mounting the Mill-Duty housing, make sure that there is
sufficient clearance when the cylinder is fully retracted
and sufficient stroke length on the Mill-Duty housing
when the cylinder is fully extended. Otherwise, damage
to the Mill-Duty housing and/or the machine could occur.
G) A 1/2" Conduit Fitting is supplied for wiring of the
linear displacement transducer. If the Mill-Duty housing
will be moving in/out or side-to-side during operation,
hard conduit is not recommended. A short length of
flexible conduit (approximately 2 feet) connected to a
junction box is normally the best method of connection.