Sheffer MA User Manual
MA SERIES
Medium-Duty Pneumatic Cylinders
Pressure Rating 200 PSI
High strength aluminum alloy is used for
both head and cap. They are accurately
machined for tube and rod bearing.
Piston rods have a minimum expected
yield of 100,000 psi. They are ground,
polished and hard chrome plated for wear
and corrosion resistance. Four wrench
flats are standard.
The tube is a high tensile, special
aluminum alloy with a hard anodized
finish. The file-hard finish offers long life
and amazing lubrication holding
properties.
Maximum strength is obtained through a
prestressed tie rod assembly.
Pistons are machined from fine grain C.I.
for excellent friction characteristics
against the hard coated tube I.D. Low
friction. The piston is of one-piece design
to provide full thickness bearing and is
threaded onto the piston rod for strength
of assembly.
Static seals at tube ends are confined,
precision cut gaskets.
Modified U-cup seals are Buna-N compound. They are self-adjusting for pressure
and wear and their design permits simple
replacement.
A Buna-N O-Ring provides a positive,
pressure activated, seal for the rod gland.
The quad ring wiper is designed to wipe
off abrasive dust and contamination on
the retract stroke to insure long life for the
seals, bearing and piston rod.
Modified U-cup design offers long life
with minimum friction. It is self-adjusting
to pressure and wear. Seal material is a
standard Buna-N compound.
The rod gland has an extra long bearing
surface and is easily removed. It is made
of a high quality cast iron and Teflon
®
coated. This affords a low friction bearing
which is highly compatible with the hard
chrome plated piston rod.
Seal Rating Temperature: – 40° to
+200°F
ITEM QUANTITY
NUMBER DESCRIPTION REQUIRED
1 HEAD 1
2 CAP 1
3 PISTON ROD 1
4 TUBE 1
5 TIE ROD 4
6 ROD GLAND RETAINER 1
9 PISTON 1
10 RETAINER SCREW 4
13 TIE ROD NUT 4
16 * TUBE SEAL 2
18 * PISTON SEAL 2
22 * ROD GLAND SEAL 1
24 * ROD WIPER 1
25 * ROD SEAL 1
29 CUSHION PISTON – FRONT **
30 CUSHION ADJUSTING SCREW **
31 CUSHION ADJUSTING SCREW SEAL **
33 * CUSHION SEAL – FRONT **
43 * CUSHION SEAL – REAR **
70 ROD BEARING 1
*Recommended Spare Parts
**As required. Specify if cushioned front, cushioned rear, or cushioned both ends.
TORQUE IN
ROD DIAMETER FOOT POUNDS
5
/8 2.8
1 6
13/8 13
13/4 27
FFIIGGUURREE 11 FFIIGGUURREE 22
Sheffer’s state-of-the-art cushion design
features a unique, one-piece, nitrile
compound seal that is captured within a
precision machined groove. This allows both
linear and radial “float”of the cushion seal
which virtually eliminates problems
associated with misalignment!
Integral flow paths molded in the periphery
of the seal provide exceptionally fast “out
of cushion” stroke reversal without the use
of ball checks.
Figure 1 shown with spear
entering cushion seal.
Figure 2 shown with spear
exiting cushion seal.
DIMENSIONALLY INTERCHANGEABLE TO MEET ANSI SPECIFICATIONS
Construction
1,2
Head & Cap
3
Piston Rod
4
Tube
5
Tie Rod Construction
9
Piston
16
Tube End Seals
18
Piston Seals
24
Rod Wiper
25
Rod Seal
70
Rod Bearing
22
Rod Gland Seal
TORQUE IN
CYLINDER BORE FOOT POUNDS
11/2 6
2 10
21/2 15
31/4 22
4 25
5 40
6 50
8 85
Parts List
Tie Rod Torque Chart
Gland Retainer Torque Chart
1
MA-1
31
30
43
5
29
33
1 31
30
13 24
3
2
9
18
4
16
25
22
70
6
10
Parts List
1
MA-2
13
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