Split gearing, another method, 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 completely fills the tooth space of the mating gear, thereby getting rid of backlash. In another edition, an assembler bolts the rotated half to the fixed half after assembly. Split gearing is generally 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 right into a tighter mesh with low or even zero clearance between tooth. It eliminates the result of variations in middle distance, tooth measurements, and bearing eccentricities. To shorten the center distance, either adjust the gears to a set range and lock them set up (with bolts) or spring-load one against the other therefore they stay tightly meshed.
Fixed assemblies are typically found in heavyload zero backlash gearbox china applications where reducers must reverse their direction of rotation (bi-directional). Though “fixed,” they could still need readjusting during program to compensate for tooth wear. Bevel, spur, helical, and worm gears lend themselves to fixed applications. Spring-loaded assemblies, on the other hand, maintain a constant zero backlash and are generally used for low-torque applications.

Common design methods include brief 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 instrumentation. Higher precision models that obtain near-zero backlash are used in applications such as robotic systems and machine device spindles.
Gear designs can be modified in several ways to cut backlash. Some methods adjust the gears to a set tooth clearance during preliminary assembly. With this process, backlash eventually increases because of wear, which needs readjustment. Other designs make use of springs to carry meshing gears at a constant backlash level throughout their service life. They’re generally limited to light load applications, though.