Airtac MG Stainless Steel Mini Air Cylinder MG40X550S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X550S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 550mm 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
- Stroke550 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionFixed anti-impact bumper pads
About the Airtac MG Stainless Steel Mini Air Cylinder MG40X550S
With a 40 mm bore and a 550 mm stroke, this MG40X550S is a double acting, JIS-standard round-body mini cylinder built for longer reach than the standard catalogue offers - strokes beyond 500 mm are made to order. The barrel is SUS304 stainless steel riveted onto the covers, paired with a 16 mm hard-chrome-plated rod (M14x1.5 male thread) and 1/8" ports. The stainless round body shrugs off washdown and damp air far better than painted-steel minis, and the JIS mounting footprint drops straight into standard mini-cylinder brackets and rod knuckles.
At 0.5 MPa the bore delivers 628.3 N push and 527.8 N pull; at 0.7 MPa that rises to 879.6 N push. For real-world sizing, plan on roughly 376 N of usable work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 margin. The fitted magnet (the S in the code) lets CMSG, DMSG or EMSG switches report rod position, while the fixed anti-impact bumper pads soften the stroke ends - they decelerate only and are not an adjustable air cushion.
Airtac MG Stainless Steel Mini Air Cylinder MG40X550S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X550S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| 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 | Fixed anti-impact bumper pads |
| 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 MG Stainless Steel Mini Air Cylinder MG40X550S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×550 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB / CB / SDB | Mounting: FA flange, LB foot, CB clevis, SDB pivot bracket (with CB). |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, CB clevis, SDB pivot block, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MG Stainless Steel Mini Air Cylinder MG40X550S Is Used
Lifting cartons off a packing line
The 628.3 N push at 0.5 MPa lifts about 32 kg vertically with a 2:1 margin - enough to raise a filled 25 kg carton plus fixture from a conveyor to an palletizing station.
Gate actuation on a food-plant washdown line
The SUS304 stainless barrel and chrome rod tolerate daily hose-down in dairy or beverage plants where a painted-steel mini cylinder would corrode, and the 550 mm stroke clears a wide diverting gate.
Position-verified press or clamp fixture
The built-in magnet with a CMSG or DMSG switch confirms full extension on a jig-clamping fixture, while the bumper pad softens the 30-800 mm/s stroke end against the fixture stop.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X550S the Right Cylinder?
At 628.3 N push (0.5 MPa) this is the largest bore in the MG range - the step down is the MG32 at 402.2 N, so choose the 40 only when your load genuinely needs the extra force. Note the 550 mm stroke is non-standard (max standard is 500 mm), so it is made to order; on a stroke this long, keep side loads off the 16 mm rod or add external guiding to avoid rod bending. Mount it with FA flange or LB foot brackets, or CB clevis plus SDB pivot, and remember a plain MG drifts when air is lost - add a pilot check valve or external rod lock if the load must stay put.
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 / CB / SDB) & 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/impact settings and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MG Stainless Steel Mini Air Cylinder MG40X550S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N; at 0.7 MPa push is 879.6 N and pull 738.9 N. The theoretical maximum at 1.0 MPa is 128.1 kgf. Operating pressure is 0.15-1.0 MPa = 22-145 psi (proof 1.5 MPa = 215 psi), speed 30-800 mm/s, temperature -20 to +70 C, with 1/8" ports and a 16 mm hard-chrome rod.
The JIS-standard MG bore 40 tops out at 500 mm of standard stroke, so 550 mm is a made-to-order build - allow lead time. The S in MG40X550S means the magnet is factory-fitted, so CMSG, DMSG or EMSG switches mount directly on the stainless barrel for end-of-stroke or mid-stroke signalling.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MG Stainless Steel Mini Air Cylinder MG40X550S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.