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GL 430 Assembly control gear



  • Flexible and robust assembly system for mechanical drive systems
  • Practical orientation based on use of standard components
  • Quick and easy assembly with no jigs and fixtures, just simple tools
  • Safe drive with hand crank
  • Comprehensive well-structured instructional material


Technical Description

This laboratory system is used to familiarise students with the design and correct assembly of step and shift gears. The programme of exercises enables familiarisation with six different drive implementation and analysis methods: understanding the brief and the drawing, assembly, setting, adjusting, testing, and making calculations.

The flexibility of the setup and the modularity of the components simplifies experimentation and implementation of the students' own ideas.

A robust tubular steel frame with a square profile and bearing elements provide the accuracy for the setting of precise gearing. All the system components are kept ready to hand and well protected in a storage system.

The multi-step and shift gears in GL 430 are based on those of a conventional lathe. The step gear unit is very similar to the primary drive on a pillar drill. 

GUNT offers three kits in this product series, each focussing on different aspects: GL 410, GL 420 and GL 430. Each kit is used entirely independently of the other kits within the series.

Learning Objectives / Experiments

- familiarisation with key components and types of mechanical drive systems
  * cone pulley drive
  * sliding gear unit
  * quick change gear unit
  * tumbler gear unit
  * change gear train
  * cam box (drop worm)
- calculations on mechanical drives
- practical setup of various drives, linked to simple configuration and alignment exercises
- reading and understanding engineering drawings, familiarisation with technical terminology


[1] demonstration and experimental kit for laying out and assembling 6 different step and shift gear units
[2] cone pulley drive
[3] sliding gear drive
[4] quick change gear
[5] tumbler gear
[6] change gear train
[7] cam box (drop worm)
[8] hand operation with crank
[9] usage of standard industrial parts
[10] solid universal frame manufactured from square steel tube

Technical Data
Spur gears
- z=24, 30, 36, 40, 45, 50, 60, 76, 80, 95
- m=2mm
Worm drive
- worm: z=6
- worm gear wheel:  z=62, m=3,15mm

Dimensions and Weight
LxWxH: 1000x500x500mm (assembled frame)
Weight: approx. 80kg
LxWxH: 600x400x120mm (storage system)
LxWxH: 600x400x170mm (storage system)

Scope of Delivery
1 base frame
1 crossbar 
8x bearing block, single, 1x bearing block, double
 1x pendulum ball bearing, 1x drop worm 
1 set of drive elements, consisting of
- 6 V-belt pulleys, 1 V-belt
- worm gear, bored worm
- 10 gear wheels
- swing lever, reversing lever, gear change  
- 3x bearing flange
- change gear axle
- 3x shaft
- 2 shafts with square shaft end
- hand crank, 4 handles
- set of small items (bolts, nuts, washers, spacer bushes, clamp rings, reducer bushes, featherkeys, pressure springs, ball bearings, pins etc.)
1 set of assembly tools
2 storage systems with foam inlay 
1 set of instructional material, consisting of 
  technical description of system, complete set of drawings with individual parts and parts list, description of assembly processes, specimen calculations

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