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.

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Displaying 1 - 30 of 203 products

Part no. Ød1 ØD1 SL L1  
4.5 12.5 4.4 5 Get a quote 4506701
5 12 5.5 6.5 Get a quote 4508601
6 13 8 9 Get a quote 4460300
10 18 6 6.6 Get a quote 4299900
10 20 8 9 Get a quote 4600000
12 18 6 7 Get a quote 4621300
12 20 4.4 5 Get a quote 4182501
12 25 8 9 Get a quote 4600100
14 22 4.4 5 Get a quote 4182601
14 22 5 5.7 Get a quote 4604000
14 24 8 9 Get a quote 4600200
15 25 8 9 Get a quote 4600300
16 24 4.4 5 Get a quote 4182701
16 24 5 5.7 Get a quote 4604100
16 26 8 9 Get a quote 4600400
18 26 4.4 5 Get a quote 4182901
18 26 5 5.7 Get a quote 4604200
18 28 7.3 8 Get a quote 4547900
18 28 8 9 Get a quote 4600500
20 28 4.4 5 Get a quote 4183001
20 28 5 5.7 Get a quote 4604300
20 30 8 9 Get a quote 4600600
20 40 12 13 Get a quote 4621900
22 30 4.4 5 Get a quote 4183101
22 35 10 11 Get a quote 4600700
22 40 10 11 Get a quote 4572900
22.4 30 5 5.7 Get a quote 4604400
22.4 32.4 8 9 Get a quote 4600800
23.5 31.5 5 5.7 Get a quote 4621500
25 33 4.4 5 Get a quote 4183301