Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 30mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 0–30mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke30 mm
- Adjustable0–30 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 MBLCJ20X30-30S
The AirTAC MBLCJ20X30-30S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The 30mm adjustment code lets you trim the full 30mm of rear travel, creating a highly versatile 0-30mm usable stroke window. Delivering 157N of push force at 0.5 MPa, it is tailored for precise, light-duty tasks. The riveted rolling-packed aluminum barrel keeps the body minimal for tight machine spaces, while the 20um hard-chrome plated carbon-steel rod resists wear. The -S code means a built-in magnet is fitted, allowing CMSG, DMSG, or EMSG sensor switches to track rod position. Unlike the base MBLJ with its fixed rubber bumper, this model uses screw-tunable air cushions to decelerate the load near each end cap, protecting the end covers from impact damage during faster cycles.
It is critical to distinguish the two adjustment mechanisms: the rear stopper physically sets the travel end position, whereas the cushion only regulates deceleration speed. Neither component locks the load in place; a plain pneumatic cylinder will drift without live air pressure, so external locking mechanisms are required for strict position holding. The standard PT threaded port is G1/8, matching the 8mm rod and M8x1.25 rod-end thread. Mounting is strictly limited to Basic, FA flange, or LB foot configurations, as this series omits the SDB pivot and back-cover options.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 30 mm |
| Adjustable window | 0–30 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 MBLCJ20X30-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 MBLCJ20X30-30S Is Used
PCB Pick-and-Place
The 157N push force and 0-30mm adjustable stroke window are ideal for fine-tuning the exact insertion depth of electronic components onto printed circuit boards without crushing delicate sockets.
Lab Dispense Valve
Tuning the rear stopper sets the precise open position of a fluid dispense valve, while the adjustable air cushion ensures the 8mm rod retracts smoothly to prevent liquid splashing.
Small Parts Ejection
The 132N pull force at 0.5 MPa provides enough power to retract a small ejection fork in a packaging machine, with the cushion absorbing the deceleration of the lightweight 8mm rod.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30S the Right Cylinder?
Stepping down is not an option as the 20mm bore is the smallest available in this series. If your application requires more force, the next size up is the 25mm bore, which provides 245N of push force at 0.5 MPa. Choose this MBLCJ variant over the MBLJ when your cycle speeds demand tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC when you need the rear travel stopper to fine-tune the end position. Remember that the rear adjuster is a travel stop, not a lock; the cylinder cannot hold a load position without continuous air pressure. For a direct replacement, match the 20mm bore, 30mm stroke, 30mm adjust code, G1/8 PT port, Basic mounting, and the -S magnet. Because the stroke is under 300mm, side-load rod bending is less of a concern, but the 8mm rod still requires an external guide for lateral stability.
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 MBLCJ20X30-30S FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N of push force and 132N of pull force. At 0.7 MPa, the push force increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The rear adjustable stroke acts as a mechanical travel stop, allowing you to trim the end position within the 0-30mm usable window. The adjustable air cushion uses a screw to tune the end-of-stroke deceleration rate. Neither mechanism locks the load; the cylinder requires live air to 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.
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