AirTAC MSI40 Single-Acting Push Mini Cylinder, 40 mm Bore
Every AirTAC MSI40 configuration on one page: 47 stock order codes with strokes from 5 to 150 mm and 3 cover/mounting combinations, from $52.33. Pick a stroke, cover and mounting and version to see the exact order code and price.
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- 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 MSI40
The AirTAC MSI40 is a single-acting, spring-return stainless-steel mini cylinder (push type) with a 40 mm bore and a 16 mm piston rod. Compressed air extends the rod and a built-in spring retracts it when the air is released, so the rod rests retracted; only one port takes air. Catalog output with the spring force already deducted is 567.3 N push at 0.5 MPa and 818.7 N at 0.7 MPa. The spring stroke has no air behind it, so it must not carry a load.
All MSI40 versions share 1/4" air ports, an M12×1.25 rod thread and rubber bumpers at both ends. The cylinder runs on filtered air between 0.2 and 1.0 MPa (proof 1.5 MPa), from -20 to +70 °C, at 50 to 800 mm/s. This page lists 47 stock order codes with strokes from 5 to 150 mm; the catalog maximum stroke is 150 mm.
MSI40 Technical Specifications
| Bore size | Ø40 mm |
|---|---|
| Stock strokes | 5 – 150 mm |
| Catalog maximum stroke | 150 mm (longer on request) |
| Acting type | Single acting, spring return (push) |
| Port size | 1/4" (PT standard) |
| Piston rod / rod thread | Ø16 mm / M12×1.25 |
| Fluid | Air (filtered by 40 µm 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 | Rubber bumper at both ends |
Source: AirTAC Products Catalog 2026A (PDF01-P0426), MI series (MSI) ordering code and specifications.
Catalog output force (Ø40 mm)
| Pressure | Push (spring deducted) |
|---|---|
| 0.5 MPa | 567.3 N |
| 0.7 MPa | 818.7 N |
AirTAC catalog values for the single-acting push type: air force on the full bore less the return-spring force. The spring stroke delivers no rated force.
How the MSI40 Order Code Is Built
| MSI40 | Series and bore (40 mm) |
|---|---|
| X100 | Stroke in mm |
| S | Built-in magnet for position sensors (blank = none) |
| CA / CM / R / U | Back cover: CA clevis-end cover; CM round-end cover; R axial-port cover; U radial-port cover |
| FA / LB / SDB / TC | Mounting: FA front flange; LB foot bracket; SDB rear pivot bracket; TC center trunnion (blank = none) |
| G / T | Port thread: G = G (BSPP), T = NPT, blank = PT |
All AirTAC MSI40 Order Codes (47)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Stroke (mm) | Back cover · Mounting | Magnet · Thread | Price | Select |
|---|---|---|---|---|---|
| MSI40X5U | 5 mm | U radial-port cover | - · PT | $52.33 | |
| MSI40X10CM | 10 mm | CM round-end cover | - · PT | $52.33 | |
| MSI40X10SCM | 10 mm | CM round-end cover | S · PT | $54.66 | |
| MSI40X10R | 10 mm | R axial-port cover | - · PT | $52.33 | |
| MSI40X10SR | 10 mm | R axial-port cover | S · PT | $54.66 | |
| MSI40X10U | 10 mm | U radial-port cover | - · PT | $52.33 | |
| MSI40X10SU | 10 mm | U radial-port cover | S · PT | $54.66 | |
| MSI40X15CM | 15 mm | CM round-end cover | - · PT | $52.33 | |
| MSI40X15SCM | 15 mm | CM round-end cover | S · PT | $54.66 | |
| MSI40X15SR | 15 mm | R axial-port cover | S · PT | $54.66 | |
| MSI40X15SU | 15 mm | U radial-port cover | S · PT | $54.66 | |
| MSI40X20CM | 20 mm | CM round-end cover | - · PT | $52.33 | |
| MSI40X20SCM | 20 mm | CM round-end cover | S · PT | $54.66 | |
| MSI40X20R | 20 mm | R axial-port cover | - · PT | $52.33 | |
| MSI40X20SR | 20 mm | R axial-port cover | S · PT | $54.66 | |
| MSI40X20U | 20 mm | U radial-port cover | - · PT | $52.33 | |
| MSI40X20SU | 20 mm | U radial-port cover | S · PT | $54.66 | |
| MSI40X25R | 25 mm | R axial-port cover | - · PT | $52.33 | |
| MSI40X25SU | 25 mm | U radial-port cover | S · PT | $54.66 | |
| MSI40X30CM | 30 mm | CM round-end cover | - · PT | $56.05 | |
| MSI40X30SCM | 30 mm | CM round-end cover | S · PT | $58.38 | |
| MSI40X30R | 30 mm | R axial-port cover | - · PT | $56.05 | |
| MSI40X30SR | 30 mm | R axial-port cover | S · PT | $58.38 | |
| MSI40X30U | 30 mm | U radial-port cover | - · PT | $56.05 | |
| MSI40X30SU | 30 mm | U radial-port cover | S · PT | $58.38 | |
| MSI40X40CM | 40 mm | CM round-end cover | - · PT | $56.05 | |
| MSI40X40SCM | 40 mm | CM round-end cover | S · PT | $58.38 | |
| MSI40X40SR | 40 mm | R axial-port cover | S · PT | $58.38 | |
| MSI40X40U | 40 mm | U radial-port cover | - · PT | $56.05 | |
| MSI40X40SU | 40 mm | U radial-port cover | S · PT | $58.38 | |
| MSI40X50U | 50 mm | U radial-port cover | - · PT | $56.05 | |
| MSI40X50SU | 50 mm | U radial-port cover | S · PT | $58.38 | |
| MSI40X60CM | 60 mm | CM round-end cover | - · PT | $59.98 | |
| MSI40X60R | 60 mm | R axial-port cover | - · PT | $59.98 | |
| MSI40X60SU | 60 mm | U radial-port cover | S · PT | $62.31 | |
| MSI40X70U | 70 mm | U radial-port cover | - · PT | $59.98 | |
| MSI40X80CM | 80 mm | CM round-end cover | - · PT | $63.96 | |
| MSI40X80SCM | 80 mm | CM round-end cover | S · PT | $66.29 | |
| MSI40X80R | 80 mm | R axial-port cover | - · PT | $63.96 | |
| MSI40X80SR | 80 mm | R axial-port cover | S · PT | $66.29 | |
| MSI40X80U | 80 mm | U radial-port cover | - · PT | $63.96 | |
| MSI40X80SU | 80 mm | U radial-port cover | S · PT | $66.29 | |
| MSI40X90U | 90 mm | U radial-port cover | - · PT | $63.96 | |
| MSI40X125U | 125 mm | U radial-port cover | - · PT | $67.89 | |
| MSI40X150CM | 150 mm | CM round-end cover | - · PT | $71.61 | |
| MSI40X150U | 150 mm | U radial-port cover | - · PT | $71.61 | |
| MSI40X150SU | 150 mm | U radial-port cover | S · PT | $73.94 |
Need a combination that is not listed? Request a quote.
Where the MSI40 Is Used
General automation
About 567.3 N at 0.5 MPa covers most pushing, lifting and indexing tasks.
Clamping fixtures
Rigid mountings hold the cylinder for clamps and presses.
Doors, gates and levers
Pivoting covers and brackets drive mechanisms that swing.
Choosing the Right MSI40 Configuration
Start with the stroke. Pick the exact travel your machine needs; a longer stroke adds length, weight and air consumption without adding force. If your length is not listed, request a quote and we will confirm whether it can be built.
Then choose the back cover and mounting. The back cover sets how the rear of the cylinder is fixed or where its air enters (CM round-end cover, R axial-port cover, U radial-port cover). R and U covers set the rear air inlet (axial or radial); a clevis-end cover with an SDB bracket or a TC trunnion lets the cylinder swing, while an FA flange or LB foot holds it rigid.
Finally pick the version: S adds a magnet for position sensors.
AirTAC MSI40 FAQ
Air extends the rod with about 567.3 N at 0.5 MPa (catalog value, spring force deducted); the internal spring retracts it when the port is vented. The force does not depend on the stroke code.
No. The return stroke is driven only by the internal spring, and AirTAC specifies that single-acting cylinders must not be loaded on it. Use a double-acting model if both directions must do work.
1/4" ports, PT thread as standard.
Back covers: CM round-end cover, R axial-port cover, U radial-port cover. Pick a pivoting cover or bracket when the load moves in an arc, a rigid one for straight-line loads.
Usually yes. Request a quote with the stroke, mounting and version and we will confirm whether it can be built, plus price and lead time.
0.2 to 1.0 MPa operating pressure (proof 1.5 MPa) and -20 to +70 °C on filtered air.
No. You can order a single MSI40. Orders are processed and handed to the carrier within 3-5 business days.
Buying the MSI40 from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-03.
Request a Quote for the MSI40
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.