Contact pin chuck for Delmhorst hammer and two-pin electrodes
The chuck is the body in the electrode head that the pin retainer threads into. It takes the load every time the electrode is driven, and it is a serviceable part — wear here is not a reason to replace the whole electrode.
Fitment
Specifications
| Part number |
631 |
| Function |
Receives the pin retainer in the electrode head |
| Sold as |
Each |
Chuck or retainer?
If the pin will not sit square, or the retainer no longer runs cleanly onto the thread, the chuck is the part to replace. If the pin works loose but the thread is sound, replace the 632 retainer first — it is the cheaper part and the more common failure.
Frequently asked questions
Can I replace this in the field?
Yes. It is a threaded component and needs no special tools, but work on a bench rather than on a job — the parts are small and easy to lose.
Does a worn chuck affect readings?
It can. A pin that is not held square makes intermittent contact under hammer load, which shows up as unstable or low readings.
For every other Delmhorst pin and retainer, see the Delmhorst Contact Pins and Retainers Guide (PDF).
Not sure which part fits your meter or electrode? Send us the model and what you are testing, and we will confirm the correct part before you order.
