Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 0–40mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke40 mm
- Adjustable0–40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
- 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 MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S
The AirTAC MBLCJ40X40-40S is a compact double-acting mini cylinder featuring a single rod and a riveted aluminum barrel. It integrates a rear stroke adjuster that allows you to trim up to 40 mm of travel, creating a usable end-position window from 0 to 40 mm. Driven by a Ø16 mm carbon-steel rod with 20 µm hard-chrome plating, it generates 628 N of push force and 528 N of pull force at 0.5 MPa. The built-in magnet (-S) supports position detection.
This model pairs the rear travel stop with an adjustable air cushion at both ends. Unlike the fixed rubber bumper found on the MBLJ series, the screw-tunable cushion allows you to regulate end-of-stroke deceleration for heavier 628 N loads, protecting the end covers from impact. The heterogeneous two-way grease-retaining piston seal maintains lubrication across the 30-800 mm/s speed range. Remember that the rear adjuster is a travel stop, not a mechanical lock—it sets the end point but does not hold the load without live air pressure.
Configured with PT threaded ports (G1/4), this SKU is designed for precise positioning. The -S magnet enables use with AirTAC CMSG (reed) and DMSG or EMSG (solid-state electronic) sensor switches. The overall length follows the formula A + 2 x stroke + adjust, meaning the cushion and adjustment mechanisms add to the total footprint compared to a fixed-stroke MBLC cylinder.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 0–40 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 MBLCJ40X40-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MBLCJ40X40-40S Is Used
Injection Mold Ejection
Uses the 0-40 mm adjustable stroke window to precisely set ejection length for varying plastic part depths, while the tunable air cushion decelerates the 628 N push force to prevent marring finished surfaces.
Printed Circuit Board Testing
Leverages the -S magnet with a DMSG solid-state sensor to verify test probe contact, relying on the adjustable end-position to dial in exact probe depth without repositioning the entire fixture.
Textile Fabric Guiding
Employs the 528 N pull force at 0.5 MPa to tension and guide fabric webs, using the rear stopper to define a strict 40 mm maximum travel limit that prevents overstretching delicate materials.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-40S the Right Cylinder?
When sizing this 40 mm bore cylinder, consider stepping down to the 32 mm bore if your application requires less than 402 N of push force at 0.5 MPa, or stepping up to the 50 mm bore if you need 981 N to handle heavier payloads. The MBLCJ40X40-40S is ideal when you need both a variable end-stop and tunable deceleration, whereas the MBLJ provides a fixed bumper for lighter impacts, and the MBLC offers a fixed stroke if your travel distance never changes.
For an exact replacement, match the 40 mm bore, 40 mm stroke, 40 mm adjust code, G1/4 port, PT thread, and the -S magnet. Mounting is limited to Basic, FA (flange), or LB (foot) styles, as this series does not accept SDB pivots or back-cover options. Because the stroke is 40 mm, side-load risks are minimal, but always guide the load externally rather than relying on the 16 mm rod. Neither the rear travel stopper nor the adjustable air cushion acts as a load-holding brake; the rod will drift without sustained air pressure.
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 MBLCJ40X40-40S 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.
The rear adjustable stroke is a mechanical travel stop that lets you trim the end position within a 0-40 mm window. The adjustable air cushion is a screw-tunable valve that regulates end-of-stroke deceleration speed. Neither holds the load in place; the cylinder requires live air to maintain position.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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