Characteristics and performance
The Hallite 720 solves difficult assembly problems and can be a cost-effective alternative to the traditional piston assembly which has a separately fitted seal and bearing(s).
This seal improves stability and has smaller extrusion gaps that extend the life of the piston seal. Moulding the bearing material over the outer diameter gives an extremely tight fit between the piston and the cylinder bore. The piston diameter is tightly controlled which reduces the tolerance build up and results in increased performance.
The Hallite 720 unitized piston is constructed using five components:
- High strength steel body
- Non-metallic bearing
- Rubber energiser
- Filled PTFE seal ring for inch sizes
- Polyurethane seal ring for metric sizes
Product details
The steel piston body is machined to exact dimensions. The non-metallic bearing material is moulded to the piston using a special proprietary process. It is then machined to the final precise outer diameter dimension to suit the cylinder bore and the seal is fitted. It is supplied ready to be attached to the piston rod for use in a cylinder.
In many cases the Hallite 720 is also supplied with an internal static sealing O-ring to provide a positive seal between the piston and the rod. Those marked with an asterisk in the part number range on the following pages do not have this internal seal.
The materials used in the standard unitised piston are selected to handle a broad range of application parameters. Contact your local Hallite technical team to decide which is best for your application.
Ask an expertDisplaying 1 - 30 of 203 products
Part no. | Ød1 | ØD1 | SL | L1 | |
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4.5 | 12.5 | 4.4 | 5 | Get a quote 4506701 |
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5 | 12 | 5.5 | 6.5 | Get a quote 4508601 |
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6 | 13 | 8 | 9 | Get a quote 4460300 |
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10 | 18 | 6 | 6.6 | Get a quote 4299900 |
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10 | 20 | 8 | 9 | Get a quote 4600000 |
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12 | 18 | 6 | 7 | Get a quote 4621300 |
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12 | 20 | 4.4 | 5 | Get a quote 4182501 |
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12 | 25 | 8 | 9 | Get a quote 4600100 |
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14 | 22 | 4.4 | 5 | Get a quote 4182601 |
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14 | 22 | 5 | 5.7 | Get a quote 4604000 |
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14 | 24 | 8 | 9 | Get a quote 4600200 |
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15 | 25 | 8 | 9 | Get a quote 4600300 |
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16 | 24 | 4.4 | 5 | Get a quote 4182701 |
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16 | 24 | 5 | 5.7 | Get a quote 4604100 |
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16 | 26 | 8 | 9 | Get a quote 4600400 |
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18 | 26 | 4.4 | 5 | Get a quote 4182901 |
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18 | 26 | 5 | 5.7 | Get a quote 4604200 |
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18 | 28 | 7.3 | 8 | Get a quote 4547900 |
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18 | 28 | 8 | 9 | Get a quote 4600500 |
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20 | 28 | 4.4 | 5 | Get a quote 4183001 |
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20 | 28 | 5 | 5.7 | Get a quote 4604300 |
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20 | 30 | 8 | 9 | Get a quote 4600600 |
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20 | 40 | 12 | 13 | Get a quote 4621900 |
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22 | 30 | 4.4 | 5 | Get a quote 4183101 |
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22 | 35 | 10 | 11 | Get a quote 4600700 |
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22 | 40 | 10 | 11 | Get a quote 4572900 |
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22.4 | 30 | 5 | 5.7 | Get a quote 4604400 |
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22.4 | 32.4 | 8 | 9 | Get a quote 4600800 |
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23.5 | 31.5 | 5 | 5.7 | Get a quote 4621500 |
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25 | 33 | 4.4 | 5 | Get a quote 4183301 |