Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 310–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable310–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S
The AirTAC MBLCJ40X350-40S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a screw-tunable air cushion at both ends. The 40 mm bore generates 628 N of push force at 0.5 MPa, making it well-suited for mid-weight positioning tasks. A 40 mm rear trimmer provides a usable travel window of 310 to 350 mm, allowing you to dial in the exact end position without mechanical shims.
This SKU includes a built-in magnet for CMSG reed or DMSG/EMSG electronic sensors. The riveted rolling-packed barrel and 20 µm hard-chrome carbon-steel rod withstand side loads, though at 350 mm of travel an external guide is highly recommended to prevent rod bending. Unlike the MBLJ which relies on a fixed rubber bumper, the adjustable cushion valve bleeds trapped air to decelerate heavy loads smoothly and protect the end covers.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 310–350 mm (trim 40 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 500 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Nominal stroke length in mm. |
| -40 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S Is Used
PCB Router Z-Axis
Lifts and lowers a spindle motor on a 350 mm travel axis, using the 40 mm rear adjuster to set a precise upper clearance and the air cushion to prevent jerk on rapid retraction.
Packaging Flap Folder
Drives a carton folding arm at 628 N push force, relying on the tunable cushion to gently decelerate the 350 mm stroke before it strikes the mechanical stop.
Textile Beam Lifter
Raises heavy fabric rollers using the full 880 N available at 0.7 MPa, with the -S magnet triggering DMSG electronic sensors to confirm upper and lower deck positions.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S the Right Cylinder?
Step down to the 32 mm bore if your application requires only 402 N of push force at 0.5 MPa, or step up to the 50 mm bore for 981 N when driving heavier tooling. Choose this MBLCJ over the MBLJ when your moving mass demands tunable end-of-stroke deceleration rather than a fixed rubber bumper, or over the MBLC if you need the 40 mm rear travel stopper to fine-tune the 310-350 mm window.
The rear adjuster sets the physical travel end and the cushion valve regulates deceleration speed, but neither component locks the rod or holds a load in place—external pneumatics are required for position holding. Mounting is limited to Basic, FA flange, or LB foot brackets (no SDB pivot or back-cover options). For an exact replacement, match the 40 mm bore, 350 mm stroke, 40 mm adjust code, G1/4 port, PT thread, and the -S magnet. Because the stroke is 350 mm, ensure external guide rails are fitted to absorb lateral forces on the Ø16 mm rod.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S FAQ
At 0.5 MPa this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa.
The 40 mm adjustment is a rear mechanical stopper that limits the physical travel window to 310-350 mm. The adjustable air cushion is a needle valve that regulates exhaust flow to decelerate the piston near the end caps. Neither feature locks the rod; they only control travel length and impact speed.
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.
Related AirTAC Adjustable-Stroke Cylinders
Request a Quote for Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.