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GL 210 Geared System Apparatus
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Fundamentals of Engineering Design /
This unit consists of a 3-stage spur gear unit with 4 shafts. One and two stage gear units can thus also be realised. Each shaft can be equipped with an additional flywheel mass to increase the angular inertia. The gears are driven using a cable drum and a variable set of weights that are lifted using a removable crank. Unwinding is prevented by a safety catch, a clamping roller freewheeling hub prevents undesired coiling of the cable. The weight is arrested by a receptacle with an impact attenuating insert. A hand brake facilitates gentle braking. The transparent protective cover prevents unintentional contact with the rotating parts. All four shafts are fitted with inductive sensors for measuring the speed. A chart recorder is used to record speed-time diagrams from which the angular acceleration can read.
Learning Objectives / Experiments

- Determination of the angular acceleration of the

  gear unit
- Mass moment of inertia of the gear unit
- Determination of the friction
- Gear efficiency


[1] Laboratory unit for investigating the dynamic behaviour of 1, 2 and 3 stage spur gear units
[2] Transmission ratio per stage i = 4:1
[3] Total transmission ratio i = 64:1
[4] Drive weight 5...50kg
[5] Fall height max. 0.65m
[6] Manual winding using crank
[7] All shafts mounted in ball bearings
[8] Inductive speed sensors on the pinion gears
[9] Chart recorder for speed-time diagrams
[10] Transparent plastic protective cover
[11] Sturdy steel tube support


Technical Data

Number of shafts: 4
Transmission ratio per stage: i = 4:1
Total transmission ratio: i = 64:1
Gear width: 16mm, modulus 2
Drive weight: 5...50kg
Fall height: max. 0.65m
Chart recorder

- chart width: 100mm
- paper feed: 7200mm/h
Speed range: 0...2000rpm
Inductive speed sensors


Dimensions and Weight
l x w x h : 970 x 590 x 1550 mm
Weight : approx. 150 kg
Required for Operation
Chart recorder: 230V , ~50Hz
Scope of Delivery
1 gear system analysis unit, complete
1 instruction manual
Order Details
030.21000  GL 210  Geared System Apparatus