Airtac MGC Stainless Steel Mini Cylinder MGC40X400S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X400S is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 400mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke400 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC40X400S
The AirTAC MGC40X400S is a double acting, JIS-standard round-body mini cylinder with a 40 mm bore and a 400 mm stroke, fitted with a variable air cushion at both stroke ends. Unlike the bumper-style MG, the cushion needles let you dial in end-of-stroke deceleration, so this cylinder handles higher piston speeds and heavier moving loads without hammering the covers. At 0.5 MPa it delivers 628.3 N push and 527.8 N pull; at 0.7 MPa that rises to 879.6 N push and 738.9 N pull, with a theoretical maximum of 128.1 kgf at 1.0 MPa. Using the common 0.6 rule of thumb, the safe working push load is roughly 38 kgf, and about 19 kgf for vertical lifting duty.
Construction follows the JIS mini footprint: a SUS304 stainless barrel with covers and stainless block riveted and rolled onto it, plus a hard-chrome plated (20 um) 16 mm rod with an M14x1.5 male thread. The two-way piston seal also stores lubricant, and ports are 1/8". Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), temperature range -20 to +70 C, and speed range 30-800 mm/s on air filtered to 40 um. The fitted magnet (the S code) allows CMSG, DMSG or EMSG switch mounting, and mounting options are FA flange, LB foot, plus I and Y rod knuckles. Note that the air cushion only decelerates the stroke end; it is not a lock or brake, so use an external rod lock or pilot check valve if the load must be held on air loss.
Airtac MGC Stainless Steel Mini Cylinder MGC40X400S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X400S |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M14×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MG-series (JIS standard) datasheet. Barrel: SUS304 stainless steel (round-body, riveted construction); piston rod: carbon steel with 20µm hard-chrome plating. Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MGC Stainless Steel Mini Cylinder MGC40X400S
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB | Mounting: FA flange, LB foot. |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MGC Stainless Steel Mini Cylinder MGC40X400S Is Used
High-speed conveyor stop and divert
The variable air cushion decelerates the piston smoothly at each end, so the MGC40X400S can stop cartons or divert product at 30-800 mm/s without cover impact, with the 628.3 N push at 0.5 MPa handling typical line loads.
Case clamp and pack-down actuator
With 879.6 N push at 0.7 MPa and adjustable end-of-stroke damping, this cylinder clamps cases or trays firmly and gently seats them, while the fitted magnet gives CMSG or DMSG position feedback for cycle verification.
Automated slide and gate actuation
The 400 mm stroke covers long gates, chutes and indexing slides, and the LB foot or FA flange mounting with I or Y rod knuckles adapts to machine frames; external guides should carry any side load.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X400S the Right Cylinder?
At 40 mm bore, the MGC40X400S sits in the middle of the cushioned MGC range: it gives 628.3 N push at 0.5 MPa, roughly 2.6 times the 245.3 N of the 25 mm bore, while the 50 mm bore steps up to 981.3 N if you need more force. If your application runs slow and light and does not need end-of-stroke deceleration, the bumper-style MG in the same 40 mm bore is the lower-cost alternative for bores 20 to 40. The variable air cushion is the reason to choose MGC when piston speed or moving mass is high. Mount with the FA flange or LB foot, add I or Y rod knuckles where the tooling needs a pivot, and the fitted magnet means CMSG, DMSG or EMSG switches can be positioned anywhere along the 400 mm stroke. With a long 400 mm stroke, keep side loads off the rod and use external guides; the hard-chrome rod resists wear but is not designed to carry lateral force.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting (LB / FA) & knuckle
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MGC Stainless Steel Mini Cylinder MGC40X400S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the figures are 879.6 N push and 738.9 N pull. The theoretical maximum at 1.0 MPa is 128.1 kgf. For sizing, apply about 0.6 of the 0.5 MPa push force as a safe working load, which is roughly 38 kgf, or about 19 kgf for vertical lifts.
The cushion needle at each stroke end throttles the exhaust air to decelerate the piston smoothly, and you adjust it to suit your speed and moving mass. It is an adjustable air cushion, not a fixed bumper pad, and it only damps end of travel. It is not a lock or brake, so the MGC40X400S will not hold position on air loss; fit an external rod lock or pilot check valve for a held load.
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