A modular manifold system that allows multiple nozzles to be fitted to a single NPT port, with rotation clamping. The manifolds allow the Nozzle Tube System, Generic Nozzles and the Grind-Loc System to be grouped in front of the grinding wheel. The Donuts are slid over a cross-drilled ported tube of the desired length. 3/8” system donuts fit over 3/8” NPT ported tubes, 1/2” system donuts fit over 1/2” NPT ported tubes, and 3/4” system donuts fit over 3/4” NPT ported tubes. When fitting NPT male threads into the outlet of Active Donuts a locknut should be used to prevent excessive thread engagement from blocking the internal flow path. The Active Donut female thread is one size smaller than the ported tube diameter that it slides over.
How it works
After taking approximate measurements of where the nozzles should be located on your machine, you can decided how many ports & nozzles are required. When assembling the donut manifold, simply attach the female coupling then slide on the donuts with the o-ring facing in. We have active donuts and blank donuts to accommodate the ideal nozzle position. The active donuts have a relief groove on the inside, to allow coolant flow in any angular orientation. Therefore, the nozzle doesn't need to be aligned with the port. After the donuts are installed, thread on the knurled knob and it is ready for your machine. The distance between the ports for each system are as follows: 3/8" system is 7/8" apart, 1/2" system is 1" apart & 3/4 system is 1 1/4" apart.
Once you have attached the manifold to your machine, it is time to thread your desired nozzle onto each donut. The donut manifold is compatible with all Cool-Grind NPT nozzles. The NPT for the 3 systems are as follows: 3/8" uses 1/4" NPT. 1/2" uses 3/8" NPT & 3/4" uses 1/2" NPT.