Griot’s Garage G9, 1000 W, 9 mm (0.35 in) throw review

What you are getting

A 1000 W random orbital polisher with a 9 mm (0.35 in) orbit throw, a 6-inch (152 mm) vented backing plate, six variable speeds from 2000 to 6400 OPM, a fan-cooled counterbalance, constant speed control stated to prevent bogging down under pressure, a double-shot rubber grip, a 10-foot quick-connect power cord and rest pads. Convertible to a 5-inch pad system with an optional plate. 2,381 g (84 oz), 371 × 191 × 160 mm (14.6 × 7.52 × 6.30 in). $176.99.

It is the only machine here that publishes all five of this shelf’s criteria

The introduction: “We compare throw, drive type, plate size, stated power and speed range.”

	G9	BATOCA 15 mm (0.59 in)	BATOCA S3	Chemical Guys	RUPES iBrid	RUPES Mille
Throw	9 mm (0.35 in)	15 mm (0.59 in)	5 mm (0.20 in)	—	12 mm (0.47 in) (HLR75)	—
Drive	random orbital	random orbital	random orbital	random orbital	random orbital	gear-driven
Plate	152 mm (5.98 in)	—	—	—	75 mm (2.95 in)	150 + 125 mm (4.92 in)
Power	1000 W	—	—	—	—	—
Speed	2000–6400 OPM	2500–5500	2500–5000	—	—	—

Five for five. The published Menzerna machine manages four of five (720 W, 15 mm (0.59 in), 125 mm (4.92 in), 6 speeds) and the published Einhell three.

And it leads on two of them: 1000 W is the highest stated power on this shelf, and 2000–6400 OPM is the widest speed range.

The low end of that range is the half that matters

The introduction asks for “a speed range wide enough to finish as well as cut.”

2000 OPM is the lowest figure on this shelf — against 2500 on both BATOCA machines. That bottom end is the finishing and wax speed: fast enough to spread, slow enough not to sling product off the pad or heat a sealant.

6400 OPM at the top is also the highest here. So the range is wider at both ends, which is what makes one machine do the whole job rather than two.

Note the unit. Griot’s publishes OPM — orbits per minute — which is what a random orbital actually does. Both BATOCA machines on this shelf publish RPM for the same dial, on tools whose plate has no driven rotation at all. Same setting, two units, and only one of them describes the machine.

Nine millimeters is the forgiving throw, deliberately

The introduction’s scale: “around 8 mm (0.31 in) is precise and slow to correct, 15 mm (0.59 in) covers panels quickly, 21 mm (0.83 in) is for large flat surfaces.”

Nine millimeters sits at the precise end. On a 152 mm plate that is a machine that corrects steadily rather than quickly and is hard to get wrong — which matches the shelf’s own line, “random orbit forgives a beginner”.

The trade is time. The BATOCA 15 mm (0.59 in) machine and the published Menzerna will cross a bonnet in fewer passes; this will take longer and leave less to fix. The need card on this shelf puts it as a safety margin: “A wide orbit cuts fast and heats the paint of a thin panel. The stated orbit throw, in millimeters, decides the margin of error left to a beginner.”

And the plate is vented, which is what keeps the pad turning

A vented plate lets air through and breaks the suction between a flat pad and a flat panel. On a free-spinning DA that suction is what stops the pad rotating — and a pad that has stopped rotating polishes nothing while still making heat.

Constant speed control is the electronic half of the same problem: “prevents bogging down under pressure”. A machine that holds its speed as you lean on it is a machine that keeps cutting where a cheaper one slows.

Together they are the free-spinning answer to what the RUPES Mille on this shelf solves with gears. They reduce the stall; they do not remove it.

Six inches is the largest plate on this shelf bar the RUPES Mille’s 150 mm, and the need card ranks on plate size: “the difference is counted in tens of minutes” on a bonnet.

The cord is ten feet, and that is a deliberate choice

“built with a 10-foot quick-connect power cord.”

Ten feet is 3 meters (10 ft), against the published Menzerna machine’s 8 m (26 ft). On its own that would be a limitation; quick-connect is why it is not. The lead detaches at the tool, so it is replaced when it is damaged — which on a cable dragged across wet, gritty panels is a question of when — and extended with whatever length the job needs.

The rest pads are the other small thing: flats molded into the body so the machine sits on a panel or a bench without the plate touching anything. The RUPES Mille here publishes the same idea as “two rubber supports”.

Fan-cooled counterbalance, and what that is for

“Equipped with a fan-cooled counterbalance and premium bearing construction.”

A random orbital’s counterweight offsets the eccentric mass of the plate; it is the part that gets hot and the part whose bearing fails. Cooling it is a durability claim rather than a performance one, and it is the only statement about internal construction on this shelf other than BATOCA’s carbon brush note and RUPES’s brushless claims.

What Griot’s does not state is whether the G9 is brushless. The published Einhell machine and the RUPES iBrid kit both do; the BATOCA 15 mm (0.59 in) machine states the opposite.

What is not published

No weight from the maker — the 2,381 g above is the shipping record, and the published Menzerna states 2.8 kg. No brushless claim. No plate thread, where this site’s polishing pads shelf notes the Griot’s conversion kit uses 5/16-24. No pads or compounds included, where the Chemical Guys and RUPES kits on this shelf are sold with them. No noise or vibration figure. No warranty term.

At $176.99 it publishes everything this shelf measures, leads on power and speed range, and is slower to correct than the cheaper machine beside it.

Availability

On sale at around $177 on the American Amazon store at the time of checking.

Prices and availability are what Keepa reported on the date this page was updated; both move.