Airtac MGC Stainless Steel Mini Cylinder MGC40X250
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X250 is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MGC40X250
The AirTAC MGC40X250 is a double acting, JIS-standard round-body mini cylinder with a 40 mm bore and 250 mm stroke, fitted with a variable air cushion at both stroke ends. Unlike the bumper-style MG, the cushion needle is adjustable, so you can dial in smooth deceleration near end of travel. That makes this cushioned build the right pick when the piston runs at higher speeds or carries a heavier moving load, because the load is braked pneumatically instead of 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. As a rule of thumb, halve the 0.5 MPa push force for vertical lifting: about 32 kg safe working load.
Construction follows the JIS mini-cylinder 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 M14x1.5 male thread. The two-way piston seal also stores lubricant, and the air ports are 1/8". Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature range -20 to +70 C, and speed 30-800 mm/s, with air filtered to 40 um. Mounting is FA flange or LB foot, with I and Y rod knuckles available. 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. This unit ships without the magnet, so no position sensor can be fitted; order the -S code if you need CMSG, DMSG or EMSG switches.
Airtac MGC Stainless Steel Mini Cylinder MGC40X250 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X250 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MGC40X250
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MGC40X250 Is Used
Conveyor stop and divert
The variable air cushion absorbs the impact of fast-moving cartons or pallets at end of stroke, so the MGC40X250 can act as a stop or pusher on lines running at higher conveyor speeds without cover damage.
Clamping and press-fit fixtures
With 628.3 N push at 0.5 MPa and 879.6 N at 0.7 MPa, the cushioned 40 mm bore suits automated clamps and light press operations where the deceleration cushion protects the fixture at cycle end.
Palletizing ejector
In packaging and palletizing cells, the adjustable cushion lets the 250 mm stroke eject or index loads smoothly at speeds up to 800 mm/s, handling heavier moving loads than the bumper-style MG.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X250 the Right Cylinder?
Size the MGC40X250 by force first: 628.3 N push at 0.5 MPa covers roughly a 64 kg moving load at full pressure, and 879.6 N at 0.7 MPa gives headroom for faster cycles. Within the MGC range, bore 40 sits above the 32 (402.2 N push at 0.5 MPa) and below the 50 (981.3 N), so step up if your load margin is tight. If your bore falls between 20 and 40 and you do not need end-of-stroke deceleration, the plain MG with fixed bumper pads is the no-cushion alternative; the MGC is also the only MG-family type offered in 50 and 63 mm bores. The 250 mm stroke is well inside the 500 mm maximum standard stroke for this bore, so it is a catalog item, and non-standard strokes up to 800 mm can be made to order. Choose FA flange or LB foot mounting, add I or Y rod knuckles as needed, and specify PT, G or NPT ports. Remember the -S magnet code if you plan to mount CMSG, DMSG or EMSG sensors. At 250 mm of stroke, keep the rod side-loading low and guide the load externally to protect the 16 mm hard-chrome rod and the cushion seals.
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 MGC40X250 FAQ
At 0.5 MPa it delivers 628.3 N push and 527.8 N pull; at 0.7 MPa, 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. For vertical lifting, a practical rule of thumb is about half the 0.5 MPa push force, roughly 32 kg safe working load.
The cushion is adjustable at both stroke ends: turn the needle to meter the exhaust air and decelerate the piston smoothly, which suits higher speeds and heavier loads than the fixed bumper MG. It decelerates only, it does not lock the load. Sensors (CMSG, DMSG, EMSG) require the magnet, which is the optional -S code; this MGC40X250 ships without it.
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