Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-30S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 10–40mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke40 mm
- Adjustable10–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- 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 MBLCJ20X40-30S
The AirTAC MBLCJ20X40-30S is a compact double-acting mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. It delivers 157 N of push force at 0.5 MPa. The 30 mm rear trimmer sets a usable travel window of 10 to 40 mm, allowing precise end-positioning without machining new mounts.
Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable cushioning here decelerates the Ø8 mm rod at stroke ends, absorbing kinetic energy to protect the end covers. The riveted aluminum barrel and grease-retaining piston seal ensure consistent low-friction movement. This -S variant includes a built-in magnet for position feedback.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 10–40 mm (trim 30 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X40-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×40 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ20X40-30S Is Used
PCB Pick-and-Place
Handling delicate printed circuit boards requires gentle end-of-stroke deceleration; the 157 N push force securely moves light assemblies while the air cushion prevents impact damage.
Textile Loom Weft Insertion
Fast cycling in textile machinery benefits from the 30-800 mm/s speed range, with the 10-40 mm stroke window allowing rapid fine-tuning of the insertion depth.
Micro-Dispenser Dosing
A 10-40 mm adjustable stroke window lets operators dial in exact fluid dispense volumes, while the DMSG electronic sensor confirms the exact shot completion.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X40-30S the Right Cylinder?
Stepping down to the 12 mm bore reduces the push force to roughly 90 N, while moving up to the 25 mm bore increases it to 245 N at 0.5 MPa. Choose this 20 mm size when your payload sits in the 15 kg force range and requires precise positioning. The rear adjuster acts purely as a mechanical travel stop; it cannot hold the load in place. For position holding, use an external lock or guide. Mounting is limited to Basic, FA, or LB styles, as no back-cover or SDB pivot is available. To replace this unit, match the 20 mm bore, 40 mm stroke, 30 mm adjust code, G1/8 PT port, and the -S magnet.
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 MBLCJ20X40-30S FAQ
At 0.5 MPa, it provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push increases to 220 N. The theoretical maximum force is 32 kgf at 1.0 MPa.
The rear 30 mm adjuster physically stops the piston to set your 10-40 mm travel window, but it does not lock the load. The adjustable air cushion only regulates end-of-stroke deceleration to prevent hard impacts; it also does not hold 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.
Related AirTAC Adjustable-Stroke Cylinders
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