Gear Box

Gearbox [GB]

One turn of the central gear drives the four compression screws of the cell at once, for a homogeneous mechanical closure.

Mechanical pressure on four screws

BETSA® offers the membrane as the standard pressure maker for its M-DACs. Pressure can also be built up with four compression screws, either by hand or with a gearbox.

The gearboxes are made for users who chose a diamond anvil cell with the clamp screw option. A single rotation on the central gear distributes the movement over the four compression screws of the DAC, so the closure stays homogeneous on all four at the same time — unlike a manual closure, which has to be done crosswise.

To know the closing distance, the upper part of the gearbox is graduated: it controls the degree of central rotation that is transferred to the external gears.

The four compression screws can be supplied with four right-hand threads, four left-hand threads, or two right-hand and two left-hand threads mounted in opposition, depending on the cell.

BETSA® Gearbox [GB] mounted on a diamond anvil cell
4 screwsDriven at once, right or left-hand thread
1 rotationSingle central action
GraduatedClosing distance readable
Clamp screwRequired cell option
BETSA® Gearbox GB-BHP 140 270: graduated upper part, central drive, four hexagonal outputs, thrust washer and clamp screw bits
Gearbox GB-BHP 140 270 — the graduated upper part, the central drive and the four hexagonal outputs, with the thrust washer and the clamp screw bits.