Split gearing, another technique, consists of two equipment halves positioned side-by-side. Half is fixed to a shaft while springs cause the spouse to rotate slightly. This increases the effective tooth thickness to ensure that it totally fills the tooth space of the mating equipment, thereby getting rid of backlash. In another edition, an assembler bolts the rotated fifty percent to the fixed half after assembly. Split gearing is normally found in light-load, low-speed applications.
The simplest and most common way to reduce backlash in a set of gears is to shorten the distance between their centers. This moves the gears into a tighter mesh with low or also zero clearance between tooth. It eliminates the effect of variations in center distance, tooth sizes, and bearing eccentricities. To shorten the center distance, either change the gears to a set distance and lock them set up (with bolts) or spring-load one against the additional therefore they stay tightly meshed.
Fixed assemblies are typically found in heavyload applications where reducers must invert their direction of rotation (bi-directional). Though "fixed," they could still require readjusting during assistance to pay for tooth wear. Bevel, spur, helical, and worm gears lend themselves to fixed 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 fillers, tapered gears, preloaded gear trains, and dual path gear trains.
Precision reducers typically limit backlash to about 2 
deg and so are used in applications such as for example instrumentation. Higher precision models that zero backlash gearbox obtain near-zero backlash are found in applications such as robotic systems and machine tool spindles.
Gear designs could be modified in many ways to cut backlash. Some methods adapt the gears to a set tooth clearance during initial assembly. With this process, backlash eventually increases due to wear, which needs readjustment. Other designs use springs to carry meshing gears at a constant backlash level throughout their program lifestyle. They're generally limited by light load applications, though.