Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-30S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 175mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 145–175mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke175 mm
- Adjustable145–175 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 MBLCJ20X175-30S
The AirTAC MBLCJ20X175-30S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The 30mm rear trimmer provides a usable end-position window of 145 to 175 mm. Driven by an 8mm carbon-steel rod with a 20um hard-chrome plating, it delivers 157 N of push force and 132 N of pull force at 0.5 MPa. This unit includes a built-in magnet (-S) for position sensing.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable pneumatic cushioning to decelerate the rod near each stroke end, absorbing kinetic energy to protect the end covers. The riveted rolling-packed barrel and heterogeneous two-way grease-retaining piston seal keep the 30-800 mm/s speed range stable. Remember the rear stopper sets the travel end; it does not lock or hold the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 175 mm |
| Adjustable window | 145–175 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 MBLCJ20X175-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×175 | 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 MBLCJ20X175-30S Is Used
PCB Pick & Place
Drives a light pick-and-place head moving electronic components across a 145-175mm travel window, using the tunable air cushion to stop smoothly without shocking the delicate vacuum grippers.
Label Applicator
Actuates a labeling wand in a packaging line, relying on the 157 N push force at 0.5 MPa to press labels flatly while trimming the rear stroke by 30mm to hit the exact container height.
Reed Sensor Positioning
Uses the built-in magnet with a CMSG reed switch to confirm retraction in a textile loom thread-cutting mechanism, where the adjustable cushion prevents snapping the 8mm rod at high speeds.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-30S the Right Cylinder?
At 0.5 MPa, this 20mm bore yields 157 N push and 132 N pull. If you need less force, step down to the 12mm bore (offering roughly 57 N); if your payload is heavier, step up to the 25mm bore (providing 245 N push). Choose the MBLCJ over the MBLJ when your moving mass requires tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC if you need on-the-fly stroke trimming. For exact replacements, match the 20mm bore, 175mm stroke, 30mm adjust code, G1/8 PT port, Basic mounting, and the -S magnet. Because the overall length equals A + 2 x 175 mm + 30 mm, use an external guide to prevent the 8mm rod from bending under side-loads.
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 MBLCJ20X175-30S FAQ
At 0.5 MPa, the 20mm bore provides 157 N push and 132 N pull. At 0.7 MPa, the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa.
The 30mm rear adjuster is a mechanical travel stop that shifts your usable stroke window between 145 and 175 mm; it does not lock the load. The adjustable air cushion is a separate screw-tunable pneumatic feature that decelerates the piston near the end covers to absorb kinetic energy. Neither holds position without live air.
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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