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 slightly. This escalates the effective tooth thickness to ensure that it totally fills the tooth space of the mating gear, thereby eliminating backlash. In another edition, an assembler bolts the rotated fifty percent to the fixed half after assembly. Split gearing is normally used 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 actually zero clearance between tooth. It eliminates the zero backlash gearbox result of variations in center distance, tooth measurements, and bearing eccentricities. To shorten the guts distance, either modify the gears to a set distance and lock them in place (with bolts) or spring-load one against the various other therefore they stay tightly meshed.
Fixed assemblies are usually used in heavyload applications where reducers must reverse their direction of rotation (bi-directional). Though “set,” they could still need readjusting during program to pay for tooth wear. Bevel, spur, helical, and worm gears lend themselves to set applications. Spring-loaded assemblies, on the other hand, maintain a continuous zero backlash and tend to be used for low-torque applications.
Common design methods include short center distance, spring-loaded split gears, plastic material 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 units that obtain near-zero backlash are used in applications such as for example robotic systems and machine tool spindles.
Gear designs can be modified in many methods to cut backlash. Some strategies change the gears to a set tooth clearance during initial assembly. With this approach, backlash eventually increases due to wear, which requires readjustment. Other designs make use of springs to hold meshing gears at a continuous backlash level throughout their service lifestyle. They’re generally limited to light load applications, though.