DW SM991 Single Tom Clamp with Memory Lock
The SM991 tom clamp lets you mount a tom where there is no holder for it: on the column of a cymbal stand, on a rack tube, on any rod from 1/2 in to 1.25 in. Its V-clamp closes in one motion, and its L-arm pivots on a 12.7 mm knurled ball.
What sets it apart
- Quick-release V-clamp, for rods and tubes from 1/2 in to 1.25 in
- 1/2 in L-arm to hold the tom
- 12.7 mm knurled ball in its socket: the angle is set freely
- One V memory lock included
- Mounts a tom without adding a stand on the floor
- Also works for accessories and effects pieces
Mounting a tom when there is no floor space left
An extra tom almost always joins a setup that is already full. The floor is taken by stand legs, the bass drum and the throne. Adding another stand means moving something else.
The clamp solves the problem by taking height where it already exists: on the column of a cymbal stand or on a rack tube. The tom ends up suspended in mid-air, between two elements, without removing anything.
The knurled ball, and why it does not slip
A tom hanging on an arm takes two things: its own weight, and the hits. A smooth joint eventually turns under that load, and the angle slowly drops during the gig.
The 12.7 mm ball is knurled, meaning grooved. When the socket closes, those grooves mesh instead of simply rubbing. The joint stays free to adjust at setup and becomes firm once tightened — two contradictory demands that no smooth surface can meet at the same time.
Weight, the real question before buying
The clamp holds what you ask of it; the stand carrying it is what decides. A 10 in tom hanging on a light cymbal stand shifts the centre of gravity forward, and the whole assembly becomes sensitive to hits.
The fix is the same as for a distant cymbal: turn the base so that one leg sits under the tom. Drummers have always passed that tip on to each other for this setup, and it is worth more than any extra tightening.
Specifications
| Clamp type | Quick-release V-clamp |
|---|---|
| Clamp range | rods and tubes from 1/2 in to 1.25 in |
| Joint | 12.7 mm knurled ball in a socket |
| Arm | 1/2 in L-arm |
| Lock included | One V memory lock |
What it is for
- Mounting an extra tom on the column of a cymbal stand
- Hanging a tom from a rack tube
- Mounting an effects piece within reach
- Adding a drum without putting a stand on the floor
- Giving a home to an orphan tom whose original holder has disappeared
Compare with other manufacturers
Nearly every manufacturer offers a tom clamp; they differ in the joint and the clamping range:
| Manufacturer | Their equivalent | Where they differ |
|---|---|---|
| Yamaha | CL940B single tom holder | Designed around the brand's own diameters |
| Gibraltar | L-rod tom mounts | Key-tightened screw clamping on several lines |
| Tama | Tom clamps from its multi-clamps | Toothed joint rather than a ball on some lines |
| Pearl | Stand-mounted tom adapters | Arm systems specific to the brand |
Frequently asked questions
- Can you really mount a tom on a cymbal stand?
- Yes, and it is a common setup. The question is not the clamp but the balance: you need one leg of the base under the tom, and a stand heavy enough for the added load.
- What diameters does the clamp accept?
- From 1/2 in to 1.25 in. That covers most stand columns and accessory rods, but not the large 1.5 in rack tubes.
- Does the L-arm fit every tom?
- It fits toms whose mount takes a 1/2 in rod. A drum designed for a thinner rod needs an arm of the matching diameter.
- What is the included memory lock for?
- It marks the clamp's position on the rod. Once the height is set, the lock keeps the assembly from sliding down and serves as a reference at the next setup.
Avis clients
An extra tom still looking for a spot?
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