Rack and Pinion Linear Module

Rack

Usually a long straight tooth structure, fixed on a base or guide rail, serving as a "track" for linear motion. The material is mostly high-strength steel (such as 45 steel, alloy steel), and the surface is quenched to improve wear resistance.

Pinion

A small gear that meshes with a rack and is driven to rotate by a motor (such as a servo motor or stepper motor). The gear teeth need to match the rack (usually straight or helical, with helical teeth reducing impact and noise).

Guiding mechanism

In conjunction with gear rack movement, it ensures the smoothness of linear motion, usually using linear guide rails (such as ball guides, slider combinations) to avoid motion deviation.

Drive unit

Includes a motor and a reducer (optional for adjusting torque and speed), some modules are equipped with encoders to achieve position feedback, forming a closed-loop control.

Module body

A frame connecting various components, mostly made of aluminum alloy or steel, balancing lightweight and structural rigidity.

Comparison dimensions

Rack&Pinion

Ball Screw

Timing Belt

Travel

Extra long (can infinitely splice racks)

Limited (limited by screw length)

Long (belt length is limited and needs to be tensioned)

Speed

High (1-5 m/s)

Medium (0.5-2 m/s)

High (2-10 m/s)

Positioning accuracy

Medium (± 0.1- ± 0.5mm)

High (± 0.001- ± 0.05mm)

Low (± 0.1- ± 1mm)

Load capacity

Medium high (suitable for radial loads)

High (suitable for axial loads)

Low (mainly for light loads)

Maintenance cost

Medium (requires regular lubrication of gears and racks)

High (requires anti contamination of lead screws)

Low (belts are prone to wear and easy to replace)

Model No

TMG135CM

tMG135CR

TMG170CM

TMG170CR

TMG220CM

TMG220CR

Motor Power (W)

400

750

750

1500

Repeatability (mm)

±0.01/±0.02

±0.01/±0.02

±0.01/±0.02

Gear Teeth

22

32

30

Gear Pitch

5

5

6.666

Reduction Ratio

1:5

1:5

1:10

1:5

1:10

Lead (mm)

22

32

16

40/20

40/20

Max Speed(mm/s)

1100

1600

800

2000/1000

2000/1000

Motor Speed 3000(rpm/min)

Max

Load

Acceleration Deceleration

Horizontal

0.3G

25

30

90

25/60

60/120

Vertical

0.3G

5

5

15

5/10

10/22

Rated Thrust

56

98

490

60/120

120/240

Linear guide (mm)

15*12.5-2

15*12.5-2

23*18-2

Origin Sensor

Out plug

EE-SX672(NPN-SX672P(PNP)

EE-SX672(NPN-SX672P(PNP)

EE-SX672(NPN-SX672P(PNP)

Inside

E2S-W13

EE-SX674(NPN-SX674P(PNP)

EE-SX674(NPN-SX674P(PNP)

Closed type

Open

Fully-closed

Open

Fully-closed

Open

Fully-closed

Automobile manufacturing

As a mobile track for welding robots and glue coating robots, it realizes long-distance translation of robots on both sides of the vehicle body or between production lines, completing automated welding, assembly and other processes; On the component conveyor line, drive the transplanting mechanism to adjust the material position and match the rhythm of different workstations.

Logistics and warehousing

In an automated three-dimensional warehouse, the horizontal walking mechanism of the stacker crane relies on gear rack modules to achieve high-speed and long-distance movement, improving the efficiency of goods storage and retrieval; The driving system of AGV (Automated Guided Vehicle) achieves precise positioning and rapid transportation through gear rack transmission.

Electronic Manufacturing

On the transportation line of large workpieces such as PCB boards and display screens, the carrier is driven to complete horizontal transfer, and automated production is achieved with the help of loading and unloading robotic arms.

Metal Processing

The worktable feed system of gantry milling machines, large boring machines and other equipment utilizes the ultra long stroke characteristics of gear and rack modules to meet the machining needs of large workpieces; In laser cutting/welding equipment, the laser head is driven to move along a large format worktable to achieve high-precision cutting path control.

Stone and Wood Processing

The crossbeam moving mechanism of marble cutting machines and woodworking carving machines achieves high-speed and stable linear motion through gear and rack transmission, ensuring the continuity of cutting or carving.

Stage and amusement equipment

The lighting frame and set translation system of a large stage use gear rack modules to achieve silent and smooth long-distance movement, which is coordinated with the switching of performance scenes; The track drive part of roller coasters and large amusement facilities utilizes its high load capacity to ensure safe operation.

Medical equipment

The patient bed translation mechanism of large CT and MRI equipment achieves precise positioning through gear and rack transmission, ensuring the stability of the examination process; The walking assistance track of the rehabilitation robot helps patients complete linear rehabilitation training.

Photovoltaic and Wind Power

In the photovoltaic panel production line, the moving track of the silicon wafer handling robotic arm requires a long stroke and high speed to match the pace of the assembly line; The blade detection equipment of the wind farm is driven by a gear rack module to move along the length direction of the blades, completing non-destructive testing.

Metallurgy and Heavy Machinery

The steel tank handling track in the steelmaking workshop and the feeding mechanism of the rolling mill utilize the high load characteristics of gears and racks to adapt to harsh working conditions such as high temperature and heavy load.

Automated parking garage

The vehicle carrying plate translation system of the three-dimensional parking garage achieves rapid transfer of vehicles between different floors or parking spaces through gear and rack transmission, improving space utilization.

Gate and hoist

The gate opening and closing mechanism in hydraulic engineering utilizes the high torque output of gears and racks to achieve smooth lifting or translation of the gate and control the water flow rate.