Expansion Sealing Plugs from Automotion
Our large range of mechanical components offers solutions to everyday machine and tooling assemblies. The range includes: captive screws and shoulder screws of every head and size, special sealing screws, nuts and washers, dowel pins, levelling feet and lifting bolts.
As specialists in mechanical components our knowledgeable technical support team can assist with your project, whether you need help picking the right corrosion resistant screws for marine applications or calculating the precise sealing plugs needed for your hydraulic systems.
Make sure you also request a free Mechanical Components Handbook here and utilise our freely available CAD files to save time planning your projects.
Expander sealing plugs for plugging hydraulic and pneumatic bores. Metric standard versions. Stainless steel.
Expander sealing plugs for plugging hydraulic and pneumatic bores. Inch, short versions. Stainless steel.
Expander sealing plugs for plugging hydraulic and pneumatic bores. Inch, standard versions. Stainless steel.
Expander sealing plugs for plugging hydraulic and pneumatic bores. Pull version for secure fastening.
Pull plug restrictors. With through bore to reduce flow rates. Steel, case-hardened.
Expansion plugs with through bore to reduce flow rates. Stainless steel.
Installation
Hole Preparation
Refer to the data sheet for the correct hole size to drill for the counterbored and drilled holesize and tolerance. Hole concentricity must be held within 0,05mm.
Bore roughness muct be between Rz (RMS) 10-30µ (especially for hard materials).
Avoid spiral or longitudinal grooves as these may affect plug performace. Ensure the holes are clean and dirt free.
Installation
Insert the plug into the counterbored hole with the ball facing outwards, seared against the counterbore shoulder.
Press the ball into the sleeve so that the top of the ball is slightly below the top of the sleeve (note approimate values for x and s in table below):
Use the correct installation tool for each plug size. The plugs can be installed using a hammer and the installation tool. An air hammer with the correct air installation tool can also be used.
| d1 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 18 | 20 | 22 |
| Stoke - S | 1,2 | 1,5 | 2,0 | 2,5 | 3,0 | 3,5 | 4,0 | 4,5 | 5,5 | 6,35 | 7,0 | 8,0 | 9,0 | 10,0 |
| Top of ball relative to top of sleeve - x ±0.2 | 0,4 | 0,2 | 0,4 | 0,4 | 0,4 | 0,3 | 0,4 | 0,4 | 0,4 | 0,4 | 0,6 | 0,6 | 0,8 | 0,8 |
Applications
Some of the typical applications for our sealing screws include:
- Pneumatics
- Hydraulics
- Fluid Power
- Automation
- Industrial
- Aerospace
- Valves
- Regulators
- Cylinders
"Standard" Expansion sealing plugs - push the ball which expands the sleeve and seals the channel
"Pull" Expansionsealing plugs. Pulling on the mandrel expands the sleeve, sealingthe channel. At a predetermined force the mandrel breaks off.
