Mechanical Model Kits
The proven way to grasp even the most
complex mechanical motion principles.
 GEARED RECIPROCATOR DRIVE
4Z4-013
Type: Gear Drive
Drive illustrates conversion of rotational motion into variable-speed reciprocation
using gearing and slotted-link connection between crank-operated input shaft and
oscillating out-put motion. Indicators useful in studying speeds and phase relationships
involved. Price: $97.24
 PLANETARY GEAR DRIVE
4Z4-014 Type:
Gear Drive
Drive illustrates principles of planetary gear systems. 108-tooth internal gear engages
30-tooth planetary gears, which mesh with 48-tooth gear on shaft concentric with input;
arm holds planetary gears. Arrangements for holding different members fixed. Illustrates
speed ratios, directional relationships and principles of construction in drives involving
gears on moving centers. Price: $188.19
 CYCLOIDAL CRANK
4Z4-015 Type: Gear Drive
Drive illustrates conversion of a uniform rotation into a unidirectional,
variable-speed rotation. Arm drives planetary pinion riding inside stationary, internal
(sun) gear. Pin on planet pinion engages slotted link on output member, imparting variable
speed. Center distance between shafts variable. Useful in studying speed variation and
motion characteristics of a non-uniform motion drive. Price: $94.09
 EPICYCLIC GEAR DRIVE
4Z4-017 Type: Gear Drive
Drive illustrates motion of a gear train consisting of a 60-tooth sun gear and arm
(input) carrying a 24-tooth planet gear riding externally on the sun gear. Planetary
(epicyclic) motion shown by following the path traced on a fixed end plate by a scribing
point attached to the planet gear. Useful in illustrating characteristics of an important
class of compound motions. Price: $57.51
 SLIDER-CRANK
MECHANISM
4Z4-018 Type: Combined
Drives
Drive illustrates basic method of converting rotation into reciprocation.
Crank-operated drive shaft pin-connected to connecting rod, which drives slider. Study of
displacements in mechanism facilitated by angular and linear scales mounted on unit.
Price: $41.82
 DOUBLE-ACTING TAPERED CLUTCH
4Z4-019
Type: Clutches
Device illustrates principle of clutching and declutching in machine drives. Cone-type
friction clutch with two-cone construction couples driving and driven shafts in either of
two positions, thus varying speed ratio. Indicators on shafts useful in studying speeds
and basic motion relationships in clutch drives. Price: $103.51
 DRAG LINKAGE
4Z4-020 Type: Lever Mechanism
Mechanism illustrates conversion of continuous rotation into continuous, non-uniform
rotation by means of a four-bar linkage. Center distance and length of coupler link
adjustable. Unit useful in studying speed relationships and method of construction
permitting unobstructed movement of linkage. Price: $38.68
 OSCILLATING TURNING-BLOCK LINKAGE
4Z4-021
Type: Lever Machanism
Drive illustrates conversion of rotation into oscillation by means of a crank driving
an eccentric, slotted link. Eccentricity is adjustable. Device useful in studying speed
variation and effect of eccentricity on motion characteristics of drive. Price: $43.89
 MECHANICAL
DIFFERENTIAL
4Z4-023 Type:
Comined Drives
Device illustrates action of a bevel-gear differential. Input crank drives arm on
intermediate member (spider) engaging two output members, the average of the speeds of
which is controlled. Useful in demonstrating principles of differential action, such as
occurs in automobile differentials. Price: $151.58
 LATHE
DRIVE WITH LEAD SCREW
4Z4-024
Type: Combined Drives
Drive illustrates principle of the drive of a metal-cutting lathe. Included are change
gears, lead screw, cylindrical work piece and pointer on compound rest simulating cutting
tool. Useful in studying relative motions and mechanical arrangements of a basic
metal-cutting machine. Price: $119.20
 SHAPER MECHANISM
4Z4-025 Type: Comined Drive
Drive illustrates quick-return motion and work-feed arrangement used in shapers. Crank
drives eccentric, slotted link connected to reciprocating output motion (of shaping tool).
Second drive involves crank-and-rocker, ratchet clutch and lead screw in controlling
advance of work piece. Useful in studying basic arrangements and speed-relationships in
shaper drives. Price: $145.00
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