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Products  |  Engineering Mechanics and Machine Elements  |  Fundamentals of Engineering Design  |  GL 430
GL 430 Gear Assembly Unit: Step and Shift Gears Show data sheet (pdf file) Print page
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 set-up 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 housing 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 set-up of various drives, linked to simple

  configuration and alignment exercises
- Reading and understanding engineering drawings,

  familiarisation with technical terminology


* Flexible and robust assembly system for mechanical

  drive systems1
* Practical orientation based on use of standard

* Quick and easy assembly with no jigs and fixtures,

   just simple tools1
* Safe drive with hand crank1
* Comprehensive well-structured instructional


Alternative products
GL 105 -- Gear Trains Model
GL 200 -- Demonstrator for Lathe Gearing Layout
GL 410 -- Gear Assembly Unit: Simple Drives
GL 420 -- Gear Assembly Unit: Combined Drives
MT 110 -- Assembly Station: Spur Wheel / Worm Gear Mechanism
MT 110.02 -- Assembly Exercise: Spur Wheel / Worm Gear Mechanism

[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

l x w x h: 1000x500x500mm (assembled frame)
Weight: approx. 80kg

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
1 storage case
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


Order Details

030.43000  GL 430  Gear Assembly Unit:

                                 Step and Shift Gears

© 2005 G.U.N.T. Gerätebau GmbH