DESCRIPTION
Technical Description
Journal bearings execute a sliding motion between a bearing journal and a bearing shell. This sliding motion is usually lubricated by an intermediate medium. The damping effect of the lubricant in the bearing gap means journal bearings run particularly smoothly and quietly. Vibration and shock impact from gear wheels or crank drives are also damped by journal bearings. They are widely used in piston engines, punches and presses as they are insensitive to high shock loads.
The journal bearings in MT 170 are grease-lubricated. Grease lubrication allows for a simple bearing construction. MT 170 consists of a ground steel shaft and two horizontally split pedestal bearings. The upper bearing shell includes a lubrication fitting with a female thread to which a Stauffer lubricator can be screw-fitted by way of an intermediate pipe to supply the bearing with lubricant. The face of the upper bearing shell, which is not subjected to load, contains a flat lubricating slot. This distributes the grease over the full width of the bearing. The grease serves not only as a lubricant but also seals the bearing against external dirt and foreign bodies.
The practice kit MT 170 forms part of the GUNT assembly, maintenance and repair practice line designed for training at technical colleges and in company training centres. A close link between theory and practice is key to the learning content.
MT 170 enables a simple journal bearing to be assembled and disassembled. Students become familiar with all the components and their modes of operation. The parts are clearly laid out and well protected in a tool box. The accompanying material details the individual steps involved in assembly, and provides additional information on the areas of application, mode of operation and design of the journal bearings.
Learning Objectives / Experiments
- design and function of a simple journal bearing
- assembly and disassembly, including for the purposes of maintenance and repair
- measuring the bearing play
- checking the alignment
- reading and understanding engineering drawings and operating instructions
- investigating the running properties of the journal bearing (together with MT 172)
FEATURES
Specification
[1] learning concept for assembly exercises on a shaft with journal bearings
[2] horizontally split pedestal bearing according to DIN 505, grease lubricated
[3] steel shaft, hardened and ground
[4] 2 pedestal bearings with split shells
[5] set of plastic strips to measure bearing play
[6] checking bearing alignment using touch-up paste
[7] complete assembly tool kit
[8] journal bearing parts and tools housed in a sheet-steel tool box
[9] The kit forms part of the GUNT assembly, maintenance and repair practice line
Technical Data
Shaft
D=25mm, shaft journal for coupling: D=16mm
Materials
- pedestal bearings, bearing covers: grey cast iron
- bearing shells: gunmetal brass according to
DIN 8.221
- shaft: hardened, ground steel
- stauffer lubricator: steel
Dimensions and Weight
LxWxH: 640x230x230mm (box)
Weight: approx. 45kg
Scope of Delivery
1 complete set of journal bearing parts
1 metal bellows coupling to join to MT 172
1 base plate
1 set of tools, consisting of
- 1 set of plastic strips to measure bearing play, 0,10...0,25mm
- 1 soft-faced hammer
- 2 open-end wrenches: size 17, 19
1 set of bolts and washers
1 tube of touch-up paste
1 tube of multi-purpose grease
1 rectangular box for small parts
1 sheet-steel tool box 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 and disassembly processes, also in relation to repair operations
