Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S
The AirTAC Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 150mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke150 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed anti-impact bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S
The MSG20X150S is a single acting, push-type JIS round-body mini cylinder with a 20 mm bore and a 150 mm stroke: compressed air extends the rod through one air line, and an internal return spring retracts it the moment air is released. Because air is only consumed on the work stroke, the circuit needs just one valve port, which keeps plumbing simple for one-way clamping, ejecting and pressing tasks. With 0.5 MPa applied the net output, already after the return spring, is about 109.9 N; at 0.7 MPa it rises to about 172.7 N. As a rule of thumb, size the working load at roughly 0.6 of the push force, so about 66 N, which suits a vertical lift of around 6 kg at 0.5 MPa.
The 20 mm barrel is SUS304 stainless with a hard-chrome plated carbon-steel rod (8 mm diameter, male thread M8x1.25), so the cylinder resists damp and washdown environments, and the JIS standard footprint drops straight into standard JIS mini brackets and I or Y rod knuckles. Riveted covers with a fixed anti-impact bumper pad soften the stroke ends, though the bumper only cushions, it never locks or brakes a load. The S code means a magnet is fitted, so CMSG, DMSG or EMSG switches can be clipped on for end-of-stroke signalling. The air port is 1/8" and the spring return sets a minimum working pressure of 0.2 MPa (28 psi).
Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S Technical Specifications
| Model | Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S |
|---|---|
| Series | MSG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 150 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 150 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 (Ø20mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 109.9 N |
| 0.7 MPa | 172.7 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S
| MSG | JIS round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | 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 MSG Stainless Steel Mini Air Cylinder MSG20X150S Is Used
Spring-return clamping
Air pushes the rod out to clamp a small fixture or workpiece at up to 109.9 N; when the valve vents, the spring releases the clamp automatically, so a power failure always leaves the part free.
Part ejection from chutes or nests
One 1/8" air line drives a 150 mm push stroke that sweeps finished parts off a conveyor stop or out of a machining nest, and the spring retracts the pusher with no second valve port.
Light lid press and snap-fit
The long 150 mm travel reaches deep into a small assembly station to press caps or snap-fit lids with about 172.7 N at 0.7 MPa, then the spring lifts the ram clear for loading.
Is the Airtac MSG Stainless Steel Mini Air Cylinder MSG20X150S the Right Cylinder?
Choose the MSG20X150S when your one-way task needs the longest standard spring-return travel in the smallest MSG bore: 150 mm is the maximum standard stroke for bore 20, and the spring-return design caps travel there. Check the load against the net push force of 109.9 N at 0.5 MPa (172.7 N at 0.7 MPa); if you need more force in the same footprint, step up to the MSG25 series, and for the largest output in this family pick the MSG40. Remember the return spring sets a 0.2 MPa (28 psi) minimum working pressure, and on air loss the spring retracts the rod to rest, so it will not hold a load in position. If your stroke is two-directional or longer than 150 mm, move to the double-acting MG instead. Mounting options are LB foot, FA flange, CB clevis and SDB pivot, plus I and Y rod knuckles; the fitted magnet on this -S model accepts CMSG, DMSG or EMSG switches.
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 0.2 – 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 MSG Stainless Steel Mini Air Cylinder MSG20X150S FAQ
The net push force, already after the return spring, is 109.9 N at 0.5 MPa and 172.7 N at 0.7 MPa. Operating pressure is 0.2 to 1.0 MPa (28 to 145 psi) with a proof pressure of 1.5 MPa (215 psi), the fluid is air filtered to 40 um, working temperature is -20 to +70 C, and piston speed is 50 to 800 mm/s. The 0.2 MPa floor exists because the spring must be overcome before the rod moves.
This is a single acting push cylinder: air on one 1/8" port extends the rod, and an internal spring retracts it when air is released, so on air loss the rod returns to rest rather than holding a load. The fixed bumper pad only cushions the stroke ends, it is not a brake. Because the S code means a magnet is fitted, you can mount CMSG, DMSG or EMSG switches for position signalling; the non-S MSG models have no magnet and no sensor option.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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