AirTAC TWQ40 Stopper Cylinder, Double Acting, Ø40 Bore
Every stocked AirTAC TWQ40 stopper cylinder on one page: 30 order codes from $53.73. Pick the stroke, stopper type and magnet to see the exact order code and price.
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- 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 TWQ40
The AirTAC TWQ40 is a fixed-height stopper cylinder with a Ø40 mm bore and 20-30 mm stroke, mounted by through holes or the tapped holes at both ends, used to stop pallets, boxes and workpieces on conveyors. It is double acting: air raises and lowers the stopper. The thicker piston rod resists impact better.
The rod end comes as a round rod, flat rod or roller, or as a lever roller with an adjustable oil shock absorber for a softer stop. The self-lock option (F) stops the lever from springing back and pushing the stopped load backwards. It follows JIS standards and needs no lubrication; the body has sensor grooves on two sides.
TWQ40 Technical Specifications
| Model | TWQ40 |
|---|---|
| Action | Double acting |
| Mounting | Through holes, tapped both ends |
| Bore | Ø40 mm |
| Strokes | 20, 25, 30 mm (+1.0/0) |
| Port | PT1/8 |
| Stopper types | Round rod, Flat rod, Roller, Lever roller, adjustable oil cushion |
| Fluid | Air (filtered by 40 µm element) |
|---|---|
| Operating pressure | 0.15-1.0 MPa |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to +70 °C |
| Cushion | Bumper |
| Lubrication | Not required |
Source: AirTAC Products Catalog 2026A (PDF01-P0760..P0761), TWQ series specifications and ordering code.
How the TWQ40 Order Code Is Built
| TWQ / TTQ | Double acting / single acting pull-in |
|---|---|
| 40 | Bore (mm) |
| ×20 / 25 / 30 | Stroke (mm) |
| S | Magnet (blank = none) |
| C / B / R / K | Stopper: round rod, flat rod, roller, lever roller, adjustable oil cushion |
| F | Self-lock, lever roller only (blank = none) |
All AirTAC TWQ40 Order Codes (30)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Stroke | Stopper | Magnet | Price | Select |
|---|---|---|---|---|---|
| TWQ40X20C | 20 mm | Round rod | No magnet | $53.73 | |
| TWQ40X20SC | 20 mm | Round rod | Magnet | $57.65 | |
| TWQ40X20-B | 20 mm | Flat rod | No magnet | $59.67 | |
| TWQ40X20SB | 20 mm | Flat rod | Magnet | $63.70 | |
| TWQ40X20R | 20 mm | Roller | No magnet | $69.54 | |
| TWQ40X20SR | 20 mm | Roller | Magnet | $73.47 | |
| TWQ40X20K | 20 mm | Lever roller, adjustable oil cushion | No magnet | $109.10 | |
| TWQ40X20SK | 20 mm | Lever roller, adjustable oil cushion | Magnet | $113.03 | |
| TWQ40X20KF | 20 mm | Lever roller, adjustable oil cushion, self-lock | No magnet | $109.10 | |
| TWQ40X20SKF | 20 mm | Lever roller, adjustable oil cushion, self-lock | Magnet | $113.03 | |
| TWQ40X25C | 25 mm | Round rod | No magnet | $55.80 | |
| TWQ40X25SC | 25 mm | Round rod | Magnet | $59.78 | |
| TWQ40X25-B | 25 mm | Flat rod | No magnet | $61.74 | |
| TWQ40X25SB | 25 mm | Flat rod | Magnet | $65.56 | |
| TWQ40X25R | 25 mm | Roller | No magnet | $71.61 | |
| TWQ40X25SR | 25 mm | Roller | Magnet | $75.59 | |
| TWQ40X25K | 25 mm | Lever roller, adjustable oil cushion | No magnet | $111.16 | |
| TWQ40X25SK | 25 mm | Lever roller, adjustable oil cushion | Magnet | $115.14 | |
| TWQ40X25KF | 25 mm | Lever roller, adjustable oil cushion, self-lock | No magnet | $111.16 | |
| TWQ40X25SKF | 25 mm | Lever roller, adjustable oil cushion, self-lock | Magnet | $115.14 | |
| TWQ40X30C | 30 mm | Round rod | No magnet | $57.65 | |
| TWQ40X30SC | 30 mm | Round rod | Magnet | $61.63 | |
| TWQ40X30-B | 30 mm | Flat rod | No magnet | $63.81 | |
| TWQ40X30SB | 30 mm | Flat rod | Magnet | $67.69 | |
| TWQ40X30R | 30 mm | Roller | No magnet | $73.47 | |
| TWQ40X30SR | 30 mm | Roller | Magnet | $77.45 | |
| TWQ40X30K | 30 mm | Lever roller, adjustable oil cushion | No magnet | $113.03 | |
| TWQ40X30SK | 30 mm | Lever roller, adjustable oil cushion | Magnet | $117.01 | |
| TWQ40X30KF | 30 mm | Lever roller, adjustable oil cushion, self-lock | No magnet | $113.03 | |
| TWQ40X30SKF | 30 mm | Lever roller, adjustable oil cushion, self-lock | Magnet | $117.01 |
Need a combination that is not listed? Request a quote.
Where the TWQ40 Is Used
Conveyor stops
Stops pallets and cartons at a work station or buffer.
Pallet indexing
Holds loads in a queue and releases them one by one.
Assembly lines
Positions workpiece carriers for an operation.
Choosing the Right TWQ40 Configuration
Choose the stroke: 20, 25, 30 mm on Ø40, tolerance +1.0/0 mm. Size the bore with the impact load and speed charts in the catalog.
Then the stopper: C round rod; B flat rod; R roller; K lever roller, adjustable oil cushion. F adds the self-lock to the lever.
S adds a magnet for position sensors.
AirTAC TWQ40 FAQ
The round rod, flat rod and roller share one impact load chart in the catalog; the lever roller has an oil shock absorber that takes up the impact for a softer stop and has its own chart. Check your load and conveyor speed against the charts.
The F self-lock device stops the lever from springing back and pushing the stopped load backwards. It is available on the lever roller types.
TWQ is double acting; TTQ is single acting, pull-in type: the spring raises the stopper when air is cut.
0.15-1.0 MPa, proof pressure 1.5 MPa, -20 to +70 °C, on air filtered to 40 µm. No lubrication.
No. You can order a single piece. Orders are processed and handed to the carrier within 3-5 business days.
Buying the TWQ40 from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-03.
Request a Quote for the TWQ40
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.