AirTAC PTBR8 Single-Acting Pull Front-Mount Pen Cylinder, 8 mm Bore
Every AirTAC PTBR8 configuration on one page: 16 stock order codes with strokes from 10 to 60 mm and 1 cover/mounting combination, from $25.76. Pick a stroke, cover and mounting and version to see the exact order code and price.
R axial-port cover
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 PTBR8
The AirTAC PTBR8 is a single-acting, spring-return front-mount pen cylinder (pull type) with an 8 mm bore and a 4 mm piston rod. Compressed air retracts the rod and a built-in spring extends it when the air is released, so the rod rests extended; only one port takes air. Catalog output with the spring force already deducted is 12.4 N pull at 0.5 MPa and 19.9 N at 0.7 MPa. The spring stroke has no air behind it, so it must not carry a load.
All PTBR8 versions share M5×0.8 air ports, an M4×0.7 rod thread and rubber bumpers at both ends. The cylinder runs on filtered air between 0.2 and 0.7 MPa (proof 1.2 MPa), from -20 to +70 °C, at 50 to 800 mm/s. This page lists 16 stock order codes with strokes from 10 to 60 mm; the catalog maximum stroke is 60 mm.
PTBR8 Technical Specifications
| Bore size | Ø8 mm |
|---|---|
| Stock strokes | 10 – 60 mm |
| Catalog maximum stroke | 60 mm (longer on request) |
| Acting type | Single acting, spring return (pull) |
| Port size | M5×0.8 |
| Piston rod / rod thread | Ø4 mm / M4×0.7 |
| Fluid | Air (filtered by 40 µm element) |
|---|---|
| Operating pressure | 0.2 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Rubber bumper at both ends |
Source: AirTAC Products Catalog 2026A (PDF01-P0439/P0440), PBR series (PTBR) ordering code and specifications.
Catalog output force (Ø8 mm)
| Pressure | Pull (spring deducted) |
|---|---|
| 0.5 MPa | 12.4 N |
| 0.7 MPa | 19.9 N |
AirTAC catalog values for the single-acting pull type: air force on the bore minus the Ø4 mm rod less the return-spring force. The spring stroke delivers no rated force.
How the PTBR8 Order Code Is Built
| PTBR8 | Series and bore (8 mm) |
|---|---|
| X100 | Stroke in mm |
| S | Built-in magnet for position sensors (blank = none) |
| R | Back cover: R axial-port cover |
All AirTAC PTBR8 Order Codes (16)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Stroke (mm) | Back cover · Mounting | Magnet | Price | Select |
|---|---|---|---|---|---|
| PTBR8X10R | 10 mm | R axial-port cover | - | $25.76 | |
| PTBR8X10SR | 10 mm | R axial-port cover | S | $26.88 | |
| PTBR8X15R | 15 mm | R axial-port cover | - | $25.76 | |
| PTBR8X15SR | 15 mm | R axial-port cover | S | $26.88 | |
| PTBR8X20R | 20 mm | R axial-port cover | - | $26.44 | |
| PTBR8X20SR | 20 mm | R axial-port cover | S | $27.51 | |
| PTBR8X25R | 25 mm | R axial-port cover | - | $26.88 | |
| PTBR8X25SR | 25 mm | R axial-port cover | S | $27.94 | |
| PTBR8X30R | 30 mm | R axial-port cover | - | $26.88 | |
| PTBR8X30SR | 30 mm | R axial-port cover | S | $27.94 | |
| PTBR8X40R | 40 mm | R axial-port cover | - | $27.51 | |
| PTBR8X40SR | 40 mm | R axial-port cover | S | $28.62 | |
| PTBR8X50R | 50 mm | R axial-port cover | - | $28.38 | |
| PTBR8X50SR | 50 mm | R axial-port cover | S | $29.49 | |
| PTBR8X60R | 60 mm | R axial-port cover | - | $28.81 | |
| PTBR8X60SR | 60 mm | R axial-port cover | S | $29.93 |
Need a combination that is not listed? Request a quote.
Where the PTBR8 Is Used
Small pushers and stoppers
About 12.4 N at 0.5 MPa suits light pushers, stoppers, gates and ejectors.
Packaging and assembly
Compact strokes for feeders, diverters and assembly stations.
Sensed positioning
Magnet versions report stroke ends to the PLC through cylinder sensors.
Choosing the Right PTBR8 Configuration
Start with the stroke. Pick the exact travel your machine needs; a longer stroke adds length, weight and air consumption without adding force. If your length is not listed, request a quote and we will confirm whether it can be built.
Then choose the back cover and mounting. The back cover sets how the rear of the cylinder is fixed or where its air enters (R axial-port cover). The front cover is fixed with hex socket screws, either from the top down or from the base up. Ø6 is built with the R axial-port cover only.
Finally pick the version: S adds a magnet for position sensors.
AirTAC PTBR8 FAQ
Air retracts the rod with about 12.4 N at 0.5 MPa (catalog value, spring force deducted); the internal spring extends it when the port is vented. The force does not depend on the stroke code.
No. The return stroke is driven only by the internal spring, and AirTAC specifies that single-acting cylinders must not be loaded on it. Use a double-acting model if both directions must do work.
M5×0.8 ports.
Back covers: R axial-port cover. Pick a pivoting cover or bracket when the load moves in an arc, a rigid one for straight-line loads.
Usually yes. Request a quote with the stroke, mounting and version and we will confirm whether it can be built, plus price and lead time.
0.2 to 0.7 MPa operating pressure (proof 1.2 MPa) and -20 to +70 °C on filtered air.
No. You can order a single PTBR8. Orders are processed and handed to the carrier within 3-5 business days.
Buying the PTBR8 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 2026-11-09.
Request a Quote for the PTBR8
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.