DW SM912S Short Cymbal Boom Arm, 9 in
The SM912S is a short cymbal boom arm: 9 in long, with a 1/2 in knurled rod. You choose it when the goal is not to reach far but to shift slightly — setting a splash next to a crash, sliding a china into a 15 cm gap, without the arm getting in the way of your right hand.
What sets it apart
- 9 in: a short offset, not a long reach
- 1/2 in knurled rod, the same as the longer arms in the line
- Toothless tilter, free angle
- Memory lock included
- Little overhang, so little strain on the base
- Fits a boom tilter, a DogBone or a Mega Clamp eyebolt
The problem with small offsets
A 10 in splash, a 14 in china, a light accessory: these pieces rarely go at the end of a long arm. They need to land right next to something else, often less than 20 cm away. With an 18 or 22 in arm, you end up sliding the rod almost all the way into the tilter, which leaves useless length sticking out the back and throws the adjustment off balance.
Nine inches solves this cleanly. The arm is extended almost to its full length, the tilter works in its normal range, and nothing sticks out the other side to knock into a drum or a knee.
What the short length gains you on stage
A tight setup does not forgive rods that stick out. On a shared stage, in a pit, in a rehearsal room, every centimetre of protruding metal ends up snagging a cable, a bag or a musician's arm.
The short arm removes that wasted length. It also reduces leverage: the cymbal stays close to the column, so the stand moves less under the hits, and you can mount a small cymbal on a light stand without turning it into a pendulum.
Two lengths, one way of adjusting
The short arm shares the toothless tilter and memory lock of the long arms. Adjusting is therefore identical from one piece to the other: find the angle, tighten, slide the memory lock down against the stop.
For a drummer who sets up and tears down often, that consistency is worth as much as the length itself. Same motion, whichever arm you pick up.
Specifications
| Usable length | 9 in |
|---|---|
| Rod diameter | 1/2 in, knurled |
| Tilter type | Toothless |
| Included accessory | Memory lock |
| Mounting compatibility | Boom tilter, DogBone, Mega Clamp with eyebolt |
What it is for
- Setting a splash right next to an existing crash
- Sliding a china into a tight space
- Mounting an effects cymbal on a stand that is already loaded
- Keeping a rod from sticking out in a tight setup
- Completing a DogBone without adding useless length
Compare with other manufacturers
Other manufacturers also make short arms, but not always with the same choices:
| Manufacturer | Equivalent part | What changes |
|---|---|---|
| Gibraltar | Short arm from its cymbal attachments | Often sold with the clamp, rarely on its own |
| Tama | Add-on arm from its cymbal attachments | Ratchet tilt on several lines |
| Mapex | Accessory arm from its cymbal clamps | Rod diameters specific to the brand, depending on the line |
Frequently asked questions
- How is it different from the 18 in boom arm?
- Only the length, and therefore the use. The 9 in arm is for short offsets; the 18 in arm is for clearing an obstacle. The rod, tilter and memory lock are built the same way.
- Will it hold a heavy cymbal?
- A ride at the end of a short arm puts little leverage on it, so mechanically it is more favourable than a long arm. The real limit is still the stand carrying the whole assembly, not the arm.
- Can I mount it on another brand's stand?
- If the receiver accepts a 1/2 in rod, yes. Tilters designed for another diameter need an intermediate clamp.
- Can it be mounted upside down, pointing down?
- Nothing prevents it mechanically, and some drummers mount an inverted china this way. The angle locks in both directions since the tilter does not work in notches.
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