Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X100-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X100-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 100mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 80–100mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke100 mm
- Adjustable80–100 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 MBLCJ40X100-20S
The AirTAC MBLCJ40X100-20S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The rear stopper allows you to trim up to 20 mm of travel, creating an 80 to 100 mm usable stroke window for precise end-positioning. The integrated -S magnet enables position feedback via CMSG reed or DMSG/EMSG electronic sensors.
Unlike the fixed rubber bumper found on the base MBLJ series, the screw-tunable air cushion on this 40 mm bore cylinder allows you to dial in end-of-stroke deceleration for heavier moving loads, protecting the end covers from impact. The cylinder features a riveted rolling-packed aluminum barrel and a 20 um hard-chrome plated carbon-steel rod to resist wear. Keep in mind the rear adjuster is a travel stop, not a lock; it sets the end point but does not hold the load in place without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X100-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X100-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Adjustable window | 80–100 mm (trim 20 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 MBLCJ40X100-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ40X100-20S Is Used
PCB Drill Bit Changer
Deploys a tool carousel in CNC PCB drilling spindles. The 628 N push force reliably shifts the heavy magazine rack, while the tunable air cushion prevents tool-jarring impacts at the 80-100 mm stroke window.
Bottle Capper Head
Lowers capping chucks onto plastic beverage bottles. The adjustable stroke lets you fine-tune the exact capping height, and the cushioning ensures the chuck does not slam down and crack the cap.
Woodworking Clamp Press
Applies lateral holding pressure on pine door frames during glue-up. The 40 mm bore provides ample clamping thrust, while the rear adjuster sets the exact clamp width without repositioning the entire fixture.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X100-20S the Right Cylinder?
When sizing this 40 mm bore cylinder, consider stepping down to the 32 mm bore (402 N push at 0.5 MPa) for lighter actuation, or up to the 50 mm bore (981 N push at 0.5 MPa) if you need significantly more thrust. Choose the MBLCJ over the MBLJ when your moving mass requires tunable shock absorption rather than a fixed bumper, or over the MBLC if you need the 20 mm rear stroke adjustment window rather than a fixed travel length.
For replacements, match the 40 mm bore, 100 mm nominal stroke, 20 mm adjust code, G1/4 port, PT thread, and -S magnet. Mounting is limited to Basic, FA flange, or LB foot brackets; there is no SDB pivot or back-cover option. Because neither the rear travel stopper nor the cushion acts as a mechanical lock, use an external guide or locking device if the load must hold position without 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 MBLCJ40X100-20S FAQ
At 0.5 MPa, this 40 mm bore double-acting 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 physically limits the rod's extension, giving you an 80 to 100 mm usable window. The adjustable air cushion is a separate needle valve that regulates exhaust flow to decelerate the piston near the end caps. Neither feature locks or holds the load without continuous air pressure.
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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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