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Choosing the right Wedge Locking Washer
Choosing the right Wedge Locking washer is critical for your application. In most cases you will know the bolt diameter that the washer is to be used with but if you have not yet decided then this it is something you will need to know.
We can provide guidance on this but you would need to have this checked by a Design Engineer to confirm it is the right size and grade for your application.
Once you have this information it is as simple as the below steps:
Step 1 – Select the Wedge Locking Washer inside diameter
What Bolt Diameter is the Wedge Locking washer to be used with? e.g. M12 Bolt diameter would be a M12 Wedge Locking Washer (These have slightly larger holes than the 12mm diameter to allow the bolt to pass through)
Step 2 – Select the material finish
If using mild steel bolts with grades such as 4.6, 4.8, 5.8, 8.8, 10.9, 12.9 then you would select our Delta Protekt Wedge locking washers. If you are using common Stainless Steel Bolts such as A1,A2,A3,A4,A5 grade and strength class 50,70 or 80 you would use our Stainless Steel Grade 316 Wedge Locking washers.
If you are unsure or need a special material then please call us for advice.
Mild Steel - Delta Protekt Finish
Stainless Steel – Grade 316
Step 3 – Select the outer diameter – Standard or Large
The last option is to select the outer diameter of the washer. Standard as the name describes is the most common and can be used for most applications where a standard clearance hole has been used for the bolt to pass through.
The large diameter version is used where the bolt hole maybe slotted so there is more contact surface at the sides of the slot and also on materials where the load needs to be spread more over a larger surface area.
Standard Diameter
Large Diameter
Wedge Lock washers need to be used where there is something that can potentially wind loose. If you have a blind bolted connection; for example the only way that it could come loose is by winding the bolt out of the blind hole in one direction then only one pair of Wedge Locking washers would be required under the bolt head.
Where you have a through bolted joint with a bolt head at one side and a nut at the other then the connection could wind loose in both directions. In this case a pair of Wedge Locking washers are required underneath the bolt head as well as the nut. Download our brochure for examples of this.
If you need any assistance with choosing the right washer or your application in general then please contact us on 0333 242 5136 or email us at info@wedgewasher.co.uk