Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B
The AirTAC ACQJ40X300-50B is a double-acting, single-rod JIS compact cylinder built for specialized long-stroke applications. Because the 300 mm stroke exceeds the standard 100 mm maximum for this bore, it is provided as a made-to-order variant. It features an external M12x1.25 threaded stop with a lock nut on the extend end, allowing you to shorten the stroke by up to 50 mm. This yields a usable extend range of 250 to 300 mm, while the retract stroke remains unaffected.
Output force is identical to a standard ACQ of the same bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa, because the adjuster only restricts travel length. The unit includes a male M14x1.5 rod-end thread (-B) for direct load coupling, a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, and a PT1/8 port. The body retains sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 – 500 mm/s |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
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 | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B Is Used
Multi-Part Machining Fixtures
Accommodates varying raw material lengths on a single machining center by dialing the extend stop back from 300 mm to 250 mm during product changeovers without swapping hardware.
Packaging Line Diverter
Sets precise package push-off distances on a conveyor; the male M14x1.5 rod end couples directly to the diverter arm while the external stop handles varying box sizes.
Extended-Reach Assembly Press
Trials different end positions for a long-reach pressing operation, using the fixed NBR bumper to absorb kinetic energy at the end of the 300 mm stroke.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B the Right Cylinder?
When sizing this cylinder, consider the 628.3 N push force at 0.5 MPa; if your application requires less force, the adjacent ACQJ32 bore provides 402.1 N, while stepping up to an ACQJ50 yields 981.8 N. If exact 300 mm extend and retract endpoints are already fixed and require no future tweaking, a standard ACQ40X300 cylinder will suffice without the external adjuster hardware. To order this adjustable version correctly, confirm the 40 mm bore, 300 mm full stroke, 50 mm adjustment window, the male M14x1.5 rod thread (-B), and note that no magnet (-S) is included. Keep in mind a plain compact cylinder will drift if air pressure is lost; utilize an external rod lock for fail-safe load holding.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50B FAQ
This 40 mm bore cylinder provides 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 300 mm with a 50 mm adjustment window, giving a usable extend range of 250-300 mm. It uses a PT1/8 port, an M12x1.25 adjuster thread, and an M14x1.5 male rod-end thread.
No, the adjuster only limits how far the rod extends, leaving the retract stroke completely unaffected. Because the piston area remains unchanged, the output force is identical to a standard ACQ cylinder. The unit relies on a fixed elastomer bumper for deceleration rather than an adjustable air cushion.
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Related AirTAC ACQJ Compact Cylinders
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