The Festo DHRS-25-A-NC is a two-jaw radial gripper from the Festo DHRS series, Festo part number 1310163. Its jaws swing right back through a full 180 degrees and it produces a pneumatic gripping torque at 6 bar of 215 Ncm when closing and 233 Ncm when opening, plus the holding torque of its spring. Repetition accuracy is 0.1 mm, the gripper weighs 277 g and it runs on compressed air from 4 to 8 bar through M5 ports.
At full opening the jaws fold almost flat against the body, so the gripper can be withdrawn straight past the workpiece inside a narrow machine. Lateral gripper jaw support carries high torque loads, and the jaws are positively driven from one piston so they stay synchronised. The housing is hard-anodised wrought aluminium and the jaws are high-alloy steel.
Both sides of the body carry integrated sensor slots, so SMT-8G, SMAT-8M or SDBT-MSX proximity switches can report the open and closed positions to the PLC without adding width to the gripper.
This is the NC version. An integrated compression spring pushes the jaws closed when the gripper is depressurised, so the workpiece stays clamped if the compressed air fails or the machine is switched off. It can also be run single-acting, with air used only to open the jaws. Minimum operating pressure is 4 bar because the air has to work against the spring.
Technical specifications
| Brand | Festo |
|---|---|
| رقم صنف Festo | 1310163 |
| رمز الموديل | DHRS-25-A-NC |
| Series | Festo DHRS |
| GTIN | 4052568229603 |
| Gripper type | Two-jaw radial gripper, self-centring |
| Size | 25 |
| Mode of operation | Double-acting, with spring gripping force retention when closing |
| Opening angle | 180 deg |
| Total gripping torque at 6 bar, closing | 215 Ncm |
| Total gripping torque at 6 bar, opening | 233 Ncm |
| Repetition accuracy | 0.1 mm |
| ضغط التشغيل | 4 to 8 bar |
| Max. operating frequency | 3 Hz |
| Min. opening time at 6 bar | 150 ms |
| Min. closing time at 6 bar | 96 ms |
| Max. static force on gripper jaw Fz | 75 N |
| Max. static torque Mx, My, Mz | 3.2 Nm |
| Mass moment of inertia | 0.71 kgcm2 |
| وصلة الهواء | M5 |
| Ambient temperature | 5 to 60 degrees C |
| Operating medium | Compressed air to ISO 8573-1:2010 [7:4:4] |
| Position sensing | Via proximity switch |
| Mounting | Internal thread with centring sleeve, or through-hole with centring sleeve |
| Housing material | Wrought aluminium alloy, hard-anodised |
| Gripper jaw material | High-alloy steel |
| Corrosion resistance class | CRC 1 |
| Product weight | 277 g |
Dimensions
The dimension drawing for the whole Festo DHRS series, including size 25, is in the image gallery on this page. It is the official Festo drawing with all reference letters, so it can be used directly for designing the mounting interface and the gripper fingers. CAD models for DHRS-25-A-NC are available from Festo, and we can send you the datasheet for part number 1310163 on request.
What the DHRS-25-A-NC is used for
- Loading and unloading machines where the gripper has to be withdrawn past the workpiece
- Handling inside narrow machine enclosures, because the jaws fold back through 180 degrees
- Transfer of shafts, rings, bottles and cylindrical parts between stations
- Feeding parts into lathes, milling machines and assembly fixtures
- Packaging and bottling lines where clearance above the product is limited
Choosing between DHPS, DHWS and DHRS
Festo builds three standard pneumatic gripper families and they are not interchangeable. DHPS parallel grippers slide both jaws in a straight line and hold the tightest repetition accuracy, 0.02 mm, which suits precise assembly. DHWS angle grippers swing each jaw out by 20 degrees so the part is cleared on release, which suits transfer between fixtures. DHRS radial grippers swing the jaws right back through 180 degrees, so the whole gripper can be withdrawn past the workpiece inside a tight machine.
A full side-by-side comparison of every size and every variant is on our Festo gripper selection guide.
Frequently asked questions
What does the type code DHRS-25-A-NC mean?
DHPS is the Festo series for two-jaw parallel grippers, DHWS for angle grippers and DHRS for radial grippers. The number after it is the size, so this is size 25. The A stands for the standard version of the series. NC means normally closed: the built-in spring closes the jaws when there is no air pressure.
What is the difference between the DHRS-25-A and the DHRS-25-A-NC?
Both are the same gripper body with the same pneumatic gripping torque. The A version is double-acting with no spring and works from 2 bar. The NC version has an integrated compression spring that closes the jaws when the gripper is depressurised, so the workpiece is still held if the air supply or the machine power fails, and it can also be driven single-acting. The NC version needs at least 4 bar because the air works against the spring. The DHRS series has no NO version.
How much gripping torque does the DHRS-25-A-NC give at 4 bar instead of 6 bar?
The gripping torque of a Festo gripper follows the operating pressure almost linearly, so at 4 bar you can expect roughly 143 Ncm closing instead of 215 Ncm at 6 bar. Festo publishes exact force curves for each size in the DHRS catalogue, and the curves also depend on the lever arm of your gripper fingers.
Which position sensors fit the DHRS-25-A-NC?
The body has integrated sensor slots on both sides. The usual choices are the SMT-8G, the SMAT-8M analogue sensor and the SDBT-MSX. Two sensors are normally fitted, one for the open position and one for the closed position.
How long can the gripper fingers be on the DHRS-25-A-NC?
The limit is not the length itself but the load it puts on the jaws. This size takes a maximum static force of 75 N on a gripper jaw and a maximum static torque of 3.2 Nm in Mx, My and Mz. Longer fingers increase the torque and reduce the usable gripping torque, so the finger length has to be checked against those figures.
How far do the jaws of the DHRS-25-A-NC open?
The jaws swing through a full 180 degrees, which folds them back almost flat against the gripper body. That is the point of a radial gripper: it can be pulled straight out past the workpiece in a machine where a parallel gripper would not clear it.
Is this a genuine Festo part?
Yes. RendatSP supplies new original Festo parts in factory packaging. This item is Festo part number 1310163, type code DHRS-25-A-NC, GTIN 4052568229603. We do not sell copies or refurbished units.
Do you ship the DHRS-25-A-NC to Iraq, Saudi Arabia and other Arab markets?
Yes. We ship worldwide from our warehouses and we have local agents in 11 countries, including Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan. Send us the part number and quantity and we will quote delivery to your city.
All Festo DHRS models we supply
| Model | رقم صنف Festo | Size | Opening angle | Gripping torque at 6 bar, closing | Version |
|---|---|---|---|---|---|
| DHRS-10-A | 1310159 | 10 | 180 deg | 15 Ncm | Double-acting |
| DHRS-16-A | 1310160 | 16 | 180 deg | 55 Ncm | Double-acting |
| DHRS-16-A-NC | 1310161 | 16 | 180 deg | 55 Ncm | Spring closing (NC) |
| DHRS-25-A | 1310162 | 25 | 180 deg | 215 Ncm | Double-acting |
| DHRS-25-A-NC (this page) | 1310163 | 25 | 180 deg | 215 Ncm | Spring closing (NC) |
| DHRS-32-A | 1310164 | 32 | 180 deg | 390 Ncm | Double-acting |
| DHRS-32-A-NC | 1310165 | 32 | 180 deg | 390 Ncm | Spring closing (NC) |
| DHRS-40-A | 1310166 | 40 | 180 deg | 660 Ncm | Double-acting |
| DHRS-40-A-NC | 1310167 | 40 | 180 deg | 660 Ncm | Spring closing (NC) |
Sensors and accessories
The parts most often ordered together with a Festo gripper are listed below. Send us the gripper part number and we will quote the matching items in the same offer.
- Proximity switches SMT-8G, SMAT-8M and SDBT-MSX for the integrated sensor slots, and the SMH-S1 Hall sensor for the smallest sizes
- Connecting cables of the NEBU and NEBA families
- Centring sleeves ZBH for accurate mounting of the gripper and of the gripper fingers
- Adapter kits DHAA and HAPG for mounting the gripper on rotary drives, linear axes and robot flanges
- Proportional pressure regulator VPPM, where the gripping force has to be set for delicate workpieces
- Air preparation and fittings, so the gripper receives compressed air to ISO 8573-1:2010 [7:4:4]
Ordering and delivery
RendatSP supplies genuine Festo DHRS-25-A-NC grippers, Festo part number 1310163, new and in original packaging. Prices are quoted on request because they depend on quantity and destination. Send us the part number and the quantity through the order form on this page, by email to info@rendatsp.com, or on WhatsApp at +86 181 5871 1787, and we normally reply with a price and a delivery time within 24 hours.
We hold more than 100,000 industrial spare parts on request, serve over 500 factories, and ship worldwide with local agents in Saudi Arabia, Iraq, the United Arab Emirates, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan. If you are not sure which gripper size your machine uses, send a photo of the part or of the machine label and our engineers will identify it for you.
