Die Cast Couplers

Our die cast couplers utilize the exact same tooling Sergent Enginnering used for decades. This means that our die cast couplers are 100% identical to a Sergent die cast coupler. You will notice that the castings are very consistant and uniform with little clean up required by the end user for a perfect fit. These couplers also have the same short comings as a original Sergent coupler, notably the alignment pin goes through the shank and can be seen from the top of the coupler. Our investment cast couplers remedy this.

Hybrid Couplers

These couplers are a mix between our die cast couplers and our investment cast couplers. These are primarily offered where a die cast part would be too costly to make. The shanks are all investment cast parts. The knuckle and bottom cover are die cast. These potentially need a small amount of clean up on the shank. This is how Sergent Engineering made their specialty couplers like their SEC87K. We continue this tradition with our hybrid couplers. If you want orginal Sergent style specialty couplers than these are the style for you. These couplers also have the alignment pin going through the shank and viewable from the top of the coupler.

Investment Cast Couplers

Our investment cast couplers use the same techniques used by Sergent Engineering to manufacture their tightlock couplers. We use a investment cast shank and bottom cover with a die cast knuckle to ensure consistant operation. We tried using investment cast knuckles but could not get consistant results that we were happy with. All investment cast couplers boast increased prototypical accuracy by eliminating the alignment pin going through the entire shank. Now this pin only goes half way through the shank. This allows for alignment still but keeps the top smooth and free of any holes that needs filling. You'll notice that the investment castings aren't as clean those that come from the die casting process. What this means in terms of assembling couplers from investment cast parts is that you'll have to pay more attention detail than you do with die cast parts. This isn't a huge deal, but do expect to spend more time assembling and checking these couplers than you do with the EC87KD and EN87KD couplers. Investment casting is a multi-day process and is very labor intensive on me. I have strict times I need to do specific actions for this process. Investment casting also is not cheap. Material gets consumed in the form of our 3D printed resin masters, and the investment powder required to make a mold of the masters. These materials are expensive and if we have a bad run are wasted. Prices reflect what we feel is fair for our time and labor.