Airtac MTG Stainless Steel Mini Cylinder MTG40X25
The AirTAC Airtac MTG Stainless Steel Mini Cylinder MTG40X25 is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 mm
- Port size1/8"
- Acting typeSingle acting, pull (spring return)
- Rod threadM14×1.5
- CushionFixed anti-impact bumper pads
About the Airtac MTG Stainless Steel Mini Cylinder MTG40X25
The AirTAC MTG40X25 is a single acting, spring-return JIS mini cylinder with a round riveted body: an internal spring holds the rod extended at rest, and compressed air retracts (pulls) it through the 25 mm work stroke. With a 40 mm bore it delivers about 339.1 N of net pull at 0.5 MPa and 550.1 N at 0.7 MPa, figures already reduced by the spring, so one air line and a simple valve are all the circuit needs. As a rule of thumb, size the load at roughly 0.6 of that force, which is a safe vertical pull of about 20 kg for this model.
Construction suits damp and washdown-adjacent duty: a SUS304 stainless barrel, a hard-chrome plated rod (16 mm with M14x1.5 male thread), riveted covers, a two-way lubricant-storing piston seal and a fixed anti-impact bumper pad that softens each stroke end. The port is 1/8" on every MTG bore, operating pressure is 0.2-1.0 MPa (28-145 psi) with 1.5 MPa (215 psi) proof, speed runs 50-800 mm/s, and the JIS footprint is its own standard, not ISO 6432. Add the S code to fit CMSG, DMSG or EMSG switches.
Airtac MTG Stainless Steel Mini Cylinder MTG40X25 Technical Specifications
| Model | Airtac MTG Stainless Steel Mini Cylinder MTG40X25 |
|---|---|
| Series | MTG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull (spring return) |
| Port size | 1/8" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Pull force (spring return) |
|---|---|
| 0.5 MPa | 339.1 N |
| 0.7 MPa | 550.1 N |
Single-acting pull: the spring extends the rod; air retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MTG Stainless Steel Mini Cylinder MTG40X25
| MTG | JIS round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MTG Stainless Steel Mini Cylinder MTG40X25 Is Used
Retract a locking pin
Air pulls the pin out of a fixture or die on command, and the spring pushes it back into the locked position the moment air is lost, a fail-safe default for clamping nests.
Tension a belt or chain
The spring keeps an idler pushed out to maintain belt tension while the 339.1 N pull at 0.5 MPa draws the idler in to release or retension the drive.
Close a gate or shutter
One valve signal closes a slide, chute gate or guard shutter; on air loss the spring reopens it, giving a predictable fail-safe state without a second air line.
Is the Airtac MTG Stainless Steel Mini Cylinder MTG40X25 the Right Cylinder?
Choose the MTG40X25 when your motion is a one-way pull of about 339.1 N at 0.5 MPa over a short 25 mm stroke. It is the largest MTG bore: step down to MTG32 for lighter draws or up from MTG32 when the pull feels marginal. Remember the direction of operation: the spring extends the rod and air retracts it, and the minimum working pressure is 0.2 MPa (28 psi) because the spring must be overcome. The spring-return design caps standard strokes at 150 mm for this bore; if you need two-way powered travel or a longer stroke, move to the double-acting MG series instead. Mounting options are LB foot, FA flange, CB clevis and SDB pivot, plus I and Y rod knuckles; order the -S suffix if you want CMSG, DMSG or EMSG magnetic sensing.
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 MTG Stainless Steel Mini Cylinder MTG40X25 FAQ
The net pull (already after the return spring) is 339.1 N at 0.5 MPa and 550.1 N at 0.7 MPa. Because the spring must be overcome, the minimum working pressure is 0.2 MPa (28 psi); the full operating range is 0.2-1.0 MPa (28-145 psi) with a 1.5 MPa (215 psi) proof pressure. Fluid is air filtered to 40 um, temperature range is -20 to +70 C, and speed is 50-800 mm/s.
On the MTG the spring extends the rod and air retracts (pulls) it, so the rod fails to its extended position on air loss; the fixed bumper pad only softens the stroke ends and never locks or holds a load. The MSG is the opposite single acting type (air pushes, spring retracts), and the MG is double acting with air on both sides for powered two-way travel and longer strokes. Order the -S suffix to fit CMSG, DMSG or EMSG switches; without the magnet no sensor can be mounted.
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