Specifications:
SG125X1493TCTCM2HG — SG standard double-acting pneumatic cylinder with a steel barrel, 125 mm bore and 1493 mm stroke. This non-magnetic configuration uses H-option FKM seals, intermediate trunnion with tcm2 supports and G threaded ports.
Product Catalog
Download Airtac Product Catalog (PDF)
The linked PDF is the 2022 Chinese SG/SGC catalog, printed pages 57–62. It covers this steel-barrel SG cylinder, ordering options, specifications, mounting dimensions and matching mounting accessories. Use the SG entries and the drawing for the ordered configuration; SGC is the aluminum-barrel alternative.
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Model Code Explained
Complete model
SG125X1493TCTCM2HG
SG
Standard double-acting, steel-barrel cylinder; no magnetic piston option.
125
125 mm cylinder bore.
Stroke
1493 mm.
Mounting code
TCTCM2 — Intermediate trunnion with TCM2 supports.
H
FKM (fluorocarbon rubber) seal option.
Thread code
G — G thread.
Technical Specifications
Action
Double-acting.
Working medium
Air filtered through a 40 μm or finer filter.
Operating pressure
0.15–1.0 MPa (22–145 psi; 1.5–10.0 bar).
Proof pressure
1.5 MPa (215 psi; 15 bar), as listed in the catalog.
Standard temperature reference
−20 to 70 °C for the standard series specification. The H high-temperature seal option permits operation at 150 °C, as stated for the high-temperature sealing material.
Piston speed
30–500 mm/s.
Stroke tolerance
0–250 mm: +1.0/0 mm; 251–1000 mm: +1.5/0 mm; 1001–1500 mm: +2.0/0 mm.
Cushioning
Adjustable pneumatic cushioning. Catalog nominal cushioning stroke: 40 mm.
Selected port thread
G1/2. The standard PT option is PT1/2; this model uses the selected G thread. Match the mating fitting to that thread standard.
Piston-rod connection
M27×2; match the rod-end attachment thread and mounting geometry.
Magnetic sensing
No magnet is fitted to SG. CMSG and DMSG are series references for a suitably magnetic SGC configuration; they cannot be used as direct piston-position sensors on this non-magnetic SG cylinder.
Theoretical Force Reference
Effective piston areas: 12272 mm² for extension and 11468 mm² for retraction. The forces below are theoretical values before friction and application load factors; they are not guaranteed lifting capacities or safe working loads.
Air pressure
Theoretical force
0.1 MPa
1227.2 N extension; 1146.8 N retraction
0.2 MPa
2454.4 N extension; 2293.6 N retraction
0.3 MPa
3681.6 N extension; 3440.4 N retraction
0.4 MPa
4908.8 N extension; 4587.2 N retraction
0.5 MPa
6136.0 N extension; 5734.0 N retraction
0.6 MPa
7363.2 N extension; 6880.8 N retraction
0.7 MPa
8590.4 N extension; 8027.6 N retraction
0.8 MPa
9817.6 N extension; 9174.4 N retraction
0.9 MPa
11044.8 N extension; 10321.2 N retraction
The 0.1 MPa table point is theoretical and below the separate 0.15 MPa minimum working-pressure specification; it does not authorize operation at 0.1 MPa.
For selection, the catalog recommends a load factor no greater than 0.7 for static or low-speed duty, and no greater than 0.5 for speeds of 50–500 mm/s. Evaluate the actual load and motion requirements separately.
Reference Weight
Calculated basic-cylinder reference weight: 7690 g + 1493 mm × 13.51 g/mm = 27860.43 g (27.86043 kg). This excludes mounting accessories, rod-end attachments and packaging. Catalog values are for reference; actual weight is subject to the physical product.
Features and Operation
ISO 15552 standard cylinder (formerly ISO 6431).
SG uses two unidirectional Y-type piston seals with a compensating function, long service life and low starting pressure.
For series comparison, SGC uses a compact, profiled bidirectional piston seal with oil-retention capability.
The SG steel barrel resists impact; SGC is the aluminum-barrel alternative.
SGC can be ordered with a magnetic ring. SG cannot be equipped with that magnetic-ring option.
Adjustable cushioning provides smooth end-of-stroke deceleration.
The series offers multiple cylinder sizes and mounting accessories. Select accessories for the actual bore and mounting arrangement.
The high-temperature sealing-material option allows normal operation at 150 °C. This model carries the H seal code.
1493 mm is not listed in the catalog standard-stroke table. Confirm acceptance of this nonstandard stroke and the selected mounting configuration before ordering. The catalog lists a maximum stroke of 1500 mm and an allowable stroke of 2000 mm for this bore; the latter is a selection reference, not an unconditional approval of every mounting or load.
Installation and Use
Use clean, filtered compressed air with 40-micrometre or finer filtration. Remove moisture and contaminants before connecting the cylinder; do not supply untreated compressor discharge or corrosive gases.
Before installation or maintenance, secure the driven load, isolate the air and electrical supplies, and exhaust trapped pressure. Restore pressure in a controlled manner to prevent sudden piston movement.
The cylinder is pre-lubricated and can normally operate without additional lubrication. If lubrication is introduced, use additive-free ISO VG32 turbine oil and maintain lubrication continuously. Oil can wash out the original grease, so subsequently stopping lubrication can shorten seal life.
Clean and blow out the tubing before connection. Keep sealing tape or compound back from the leading 1-2 thread turns so that fragments cannot enter the cylinder.
Use speed controls at both cylinder ports. During commissioning, open the flow controls gradually from the closed position and increase speed from a low setting. Meter-out control is generally used for stable motion and to reduce sudden movement at startup.
Adjust the end cushions to suit the actual load and speed until movement is free of rebound. Do not force the cushion adjusters shut. Use external cushioning when the load or speed exceeds what the cylinder cushions can absorb.
Protect the rod and sliding surfaces from impact, dust, splash and corrosion. At low temperatures prevent moisture from freezing. For extended storage, protect exposed surfaces against corrosion and cap the ports against contamination.
External and Mounting Dimensions
Dimensions are in millimetres unless a thread is shown. Letter symbols refer to the corresponding catalogue drawing. Values containing stroke are calculated from the catalogue dimension formulas. Refer to the PDF for geometric datums and mounting drawings. Basic drawing dimensions exclude any assembled accessory or packaging envelope. Mounting-hole callout: 8-M12, depth 31 mm; square pitch 110 mm. The selected mounting drawing uses its own letter symbols.
Drawing reference
Dimension
Basic A + stroke (drawing length)
1772 mm (279 + stroke; calculated from catalog dimensions)
Basic AB
119 mm
Basic AC + stroke (drawing length)
1653 mm (160 + stroke; calculated from catalog dimensions)
Basic AD
46 mm
Basic AE
46 mm
Body cross-section (B)
140 × 140 mm
Rod diameter (D)
32 mm
Basic DA
74 mm
Rod-end thread (E)
M27 x 2.0
Basic EA
54 mm
Basic F
41 mm
Basic FA
13.5 mm
Basic H
27 mm
Mounting thread (K)
M12
Mounting-hole depth (KA)
31 mm
Square hole pitch (KB)
110 mm
Basic M
60 mm
Basic MA
45 mm
Basic N
60 mm
Rear locating projection (NA)
4 mm
Two ports (P)
G1/2
Basic PA
23 mm
Basic PB
14 mm
TC A
160 mm
TC B
25 mm
TC C
40 mm
TC D
25 mm
TC E
158.5 mm
TC F
110 mm
TC G
M12
TC H
119 mm
TC I
826.5 mm (80 + stroke / 2; calculated from catalog dimensions)
TC J
1653 mm (160 + stroke; calculated from catalog dimensions)
TC K
945.5 mm (199 + stroke / 2; calculated from catalog dimensions)
TCM2 A
160 mm
TCM2 B
24.5 mm
TCM2 D
25 mm
TCM2 E
50 mm
TCM2 F
14 mm
TCM2 G
187.5 mm
TCM2 H
212 mm
TCM2 I
20 mm
TCM2 J
14 mm
TCM2 K
50 mm
TCM2 L
75 mm
TCM2 M
119 mm
TCM2 N
1653 mm (160 + stroke; calculated from catalog dimensions)
TCM2 O
826.5 mm (80 + stroke / 2; calculated from catalog dimensions)
TCM2 P
945.5 mm (199 + stroke / 2; calculated from catalog dimensions)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Mounting Accessories and Matching Conditions
The selected mounting arrangement is Intermediate trunnion with TCM2 supports. The references below describe compatible mounting choices and mating supports; they are not a statement that every accessory is included. Use the selected arrangement and verify the order contents.
F-SI125LB
Foot mounting bracket for axial, fixed installation of the 125 mm cylinder.
F-SI125FA
Flange plate for FA front-flange or FB rear-flange mounting; fit it at the end required by the selected arrangement.
F-SE125CA
Rear single-clevis mounting accessory for a pivoting cylinder installation.
F-SE125CB
Rear double-clevis mounting accessory. It is also the required mating support for CR.
F-SI125CR
Rear pivot bracket. It must be paired with F-SE125CB; CR cannot be used alone.
F-SG125TC
Intermediate trunnion bracket for the 125 mm SG cylinder. Pair it with the applicable TCM1 or TCM2 trunnion support. Do not arbitrarily change the catalog installation position.
F-SI125FTC
Front-cover trunnion bracket. Use it with the corresponding TCM1 or TCM2 trunnion support and the catalog installation geometry.
F-SI125TCM1
TCM1 trunnion support for the corresponding TC or FTC arrangement. Match the trunnion and support dimensions; do not arbitrarily reposition the support.
F-SI125TCM2
TCM2 trunnion support for the corresponding TC or FTC arrangement. Match the trunnion and support dimensions; do not arbitrarily reposition the support.
For this TCM2 configuration: the model combines TC with TCM2. Match F-SG125TC to F-SI125TCM2 and retain the catalog installation position.
Piston-Rod End Attachments
Select the attachment for the driven mechanism. All four references below have the M27×2 thread for this 125 mm cylinder; they are alternative connection types, not an instruction to fit all four together.
F-M27X200I
I-type single-eye joint for a pin connection. Match the pin and clevis geometry to the mating mechanism. Optional joint catalog reference weight: 1201.0 g; actual weight is subject to the physical product.
F-M27X200Y
Y-type clevis joint for a pin connection. Match the pin, mating eye and clevis spacing. Optional joint catalog reference weight: 1473 g; actual weight is subject to the physical product.
F-M27X200F
Floating joint for limited alignment compensation between the piston rod and driven mechanism. Follow the joint limits; it does not permit side loading of the cylinder. Optional joint catalog reference weight: 1470 g; actual weight is subject to the physical product.
F-M27X200U
Spherical rod-eye joint for an articulated connection. Match the pin and articulation clearance; avoid transmitting lateral load to the piston rod. Optional joint catalog reference weight: 1210 g; actual weight is subject to the physical product.
Align the load with the piston-rod axis and provide external guidance where needed, especially for a long stroke. For a swinging load, use an appropriate pivoting cylinder mounting arrangement such as CA, CB or TC. A rod-end joint does not replace load guidance.
Seal-Set References
P-SG125-R2
FKM seal-set reference retained for the high-temperature material choice. Match the exact cylinder and seal-set specification before ordering.
P-SG125N-R1
NBR seal-set reference. This standard-material alternative must not be treated as an equivalent replacement that preserves the H high-temperature capability.
Internal Components
The component list below retains the SG/SGC construction references. Standard seal-material entries are series references; this ordered H configuration uses the FKM seal option. SG has a steel barrel and no magnet; the aluminum barrel and magnetic ring belong to the SGC alternative.
1. Nut — carbon steel.
2. Piston rod — S45C steel, hard-chrome-plated and ground.
3. Front-cover seal — NBR for SGC250; TPU for other standard series configurations.
4. Bearing — wear-resistant material.
5. Front cover — aluminum alloy.
6. O-ring — NBR in the standard component list.
7. Cushioning seal — NBR for SGC250; TPU for other standard series configurations.
8. Wear ring — wear-resistant material.
9. O-ring — NBR in the standard component list.
10. Magnet — rubber magnetic ring for magnetic SGC; none for SG.
11. Piston seal — NBR in the standard component list.
12. Hexagon-socket screw — carbon steel.
13. Piston — aluminum alloy.
14. Cylinder barrel — steel for SG; aluminum alloy for SGC.
15. Rear cover — aluminum alloy.
16. Tie rod — carbon steel.
17. Tie-rod nut — carbon steel.
Series Ordering Options
Series mounting references include basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1 and TCM2 arrangements. These are selection alternatives. CR requires CB; TC and FTC use the corresponding TCM1 or TCM2 supports. The complete model above identifies this cylinder’s selected configuration.
PT and G port threads are separate options. Magnetic CMSG/DMSG sensor use requires the appropriate magnetic SGC cylinder; it is not available directly on SG. Confirm any nonstandard stroke and the required mounting geometry against the order and catalog.
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