G-747 is a silicone thermal grease from Shin-Etsu, rated 0.90 W/m·K. Typical uses: Semiconductors, heat sinks, resin-encapsulated power transistors. Short answer: we dispense it with a PCP progressive cavity pump.
Material at a glance
| Manufacturer | Shin-Etsu |
|---|---|
| Type | Thermal grease |
| Chemistry | Silicone |
| Thermal conductivity | 0.90 W/m·K |
| Viscosity | 50 Pa·s |
| Cure | non-curing (grease) |
From the manufacturer's published data (source). Always work from the current technical data sheet.
How we dispense it
For a single-component thermal compound we start with a PCP progressive cavity pump, fed from a cartridge for lab and low volume, or from a pail with a follower-plate pail pump for production. A progressive cavity pump meters by volume, so dot and bead size stay consistent. Pump size depends on your dot or bead size and cycle time.
- Abrasion: the ceramic filler that carries the heat wears pumps out. We use tungsten carbide rotors and wear-resistant stators and run the pump slowly, at 8 to 12 rpm, for long wear life.
- Feed: thick pastes don't flow to a pump on their own. Above cartridge volumes, a follower plate pushes the material out of the pail and keeps air out.
- Non-curing: there's nothing to purge, so the job is accurate, repeatable metering.
See our PCP progressive cavity pumps, or use the pump configurator.
Frequently asked questions
What pump should I use to dispense G-747?
For a single-component thermal compound we start with a PCP progressive cavity pump, fed from a cartridge for lab and low volume, or from a pail with a follower-plate pail pump for production. Pump size depends on your shot or bead size and cycle time; send us those and we will size it.
Can G-747 be fed from pails instead of cartridges?
Cartridges suit lab and low volume. Above that, a follower-plate pail pump feeds the metering pump directly, which cuts container changes and waste.
Does G-747 need mixing?
No. It is a single-component material, so there is no mixer and no ratio to hold. The job is accurate, repeatable volumetric metering, which is what a progressive cavity pump does.
Will G-747 wear out the pump?
Thermally conductive fillers are abrasive. With tungsten carbide rotors, wear-resistant stators and pump speeds of 8 to 12 rpm, stators typically last 6 to 12 months and rotors up to 24 months, and a pump rebuild takes under an hour.
Talk it through with us
Running G-747, or about to? Send us the technical data sheet, your bead or shot size and your cycle time, and we'll recommend a pump and feed system. We can run an application test on your material before you buy. Contact us
Related materials
- X-23-8052 · Shin-Etsu, thermal grease
- G-751 · Shin-Etsu, thermal grease
- G-775 · Shin-Etsu, thermal grease
- G-777 · Shin-Etsu, thermal grease
- G-779 · Shin-Etsu, thermal grease
- G-776 · Shin-Etsu, thermal grease
All thermal interface materials · Materials we've dispensed
G-747 is a trademark of Shin-Etsu or its affiliates. Dispense Robotics is not affiliated with the manufacturer; the name is used to describe the material our equipment dispenses.