Split gearing, another technique, consists of two equipment halves positioned side-by-side. Half is fixed to a shaft while springs cause the other half to rotate somewhat. This escalates the effective tooth thickness so that it totally fills the tooth space of the mating equipment, thereby getting rid of backlash. In another edition, an assembler bolts the rotated half to the fixed fifty percent after assembly. Split gearing is normally found in light-load, low-speed applications.
The simplest and most common way to lessen backlash in a pair of gears is to shorten the length between their centers. This moves the gears into a tighter mesh with low or even zero clearance between tooth. It eliminates the result of variations in center distance, tooth dimensions, and bearing eccentricities. To shorten the center distance, either change the gears to a set range and lock them in place (with bolts) or spring-load one against the additional therefore they stay tightly meshed.
Fixed assemblies are typically used in heavyload applications where reducers must invert their direction of rotation (bi-directional). Though “fixed,” they may still require readjusting during provider to pay for tooth wear. Bevel, spur, helical, and worm gears lend themselves to set applications. Spring-loaded assemblies, however, maintain 
a continuous zero backlash and are generally used for low-torque applications.
Common design methods include brief center distance, spring-loaded split gears, plastic-type material fillers, tapered gears, preloaded gear trains, and dual path gear trains.
Precision reducers typically limit backlash to about 2 deg and are used in applications such as for example zero backlash gearbox instrumentation. Higher precision systems that obtain near-zero backlash are found in applications such as robotic systems and machine tool spindles.
Gear designs can be modified in a number of ways to cut backlash. Some methods adjust the gears to a set tooth clearance during preliminary assembly. With this approach, backlash eventually increases due to wear, which requires readjustment. Other designs use springs to hold meshing gears at a constant backlash level throughout their program life. They’re generally limited by light load applications, though.
