The document describes the design features of a FIAT bogie used in trains. It includes descriptions of the bogie frame, wheelset, primary and secondary suspensions, brake systems, and other components. The bogie is designed to support coaches at speeds up to 160kph, using components like nested coil springs, dampers, and an anti-roll bar to provide stability and ride comfort during operation. Material specifications and dimensions are provided for key parts.

2. DESIGN FEATURES:

3. FIAT BOGIE
SUB-SYSTEMS

4. BOGIE FRAME
 Y-FRAME -STEEL SHEETS(St-52)
 TWO SIDE FRAMES CONNECTED BY TWO CROSS BEAMS
-SUPPORT BRAKE UNITS.
 BOGIE FRAME ON THE PRIMARY SPRINGS AND SUPPORTS
VEHICLE BODY THROUGH BOLSTER.
 BOLSTER-BOGIE FRAME THROUGH SECONDARY
SUSPENSION.

5. BOGIE FRAME

6. BOGIE FRAME

7. Primary Damper
Primary Spring assly
(Bogie frame lifted)

8. MATERIAL PROPERTIES:
S355J2G3;
EN10025
GS20Mn5V;
DINl:17182
SG400/18;
IS:1865
SG400/15;
IS:1865
UTS IN Mpa 490-630 500 – 650 400 400
YIELD
STRENGTH
Mpa
355 360 250 250
ELONGATI
ON %AGE
22 24 18 15
IMPACT 27J AT -20
0
C
70 J -- --
CHEMICAL
%AGE:
C 0.23, Mn
1.7, Si 0.6, S
&P 0.045
C 0.17 to
0.23, Si 0.60,
Mn 1.00 to
1.50, S≤
0.020,
P≤0.015, Cr ≤
0.30, Mo ≤
0.15, Ni
≤0.40
---- ---

9.  Primary suspension
 Four nos each per bogie -nested coil springs, primary
vertical dampers, control arm, elastic joints-connecting the
bearing on wheelset to bogie frame.
 Flexible guidance.

10. Rubber Pad
Spring Guide
Outer Spring
Inner Spring
Bump StopLower Spring Guide
(Primary exploded)

11. (Wheel set with Primary suspension)
Control Arm
Bearing Assly
with earthing
eq./speed sensor

12. C
Primary Damper
(Wheel set with Primary springs removed)
Control Arm

13. WHEELSET
 Two brake disks (4), diameter
640 mm and width 110 mm.
 Two wheel discs of dia 915
(New), 845 (worn).

14. Wheel & Axle Assly
Brake Disc

15. DIMENSIONS OF WHEEL SET:

16. Wheel Disc:

17. WHEEL RE-PROFILING AND
BALANCING:
 DYNAMIC BALANCING 320RPM
 LESS THAT/EQUAL TO 50GM.M
 GLUE THE NEEDED WEIGHTS.

18. DETAIL OF ADDED WEIGHTS:

19. AXLE BEARINGS
 CARTRIDGE TAPER
ROLLER BEARING
 PRE-ASSEMBLED UNIT.
 MAINTENANCE FREE-
OVERHAUL 1.2 MILLION
KM.

20. CTRB

21. BRAKE CALLIPER UNITS
 AXLE MOUNTED DISC BRAKE
 INBUILT SLACK ADJUSTER IN BRAKE
CYLINDERS
 CALLIPER RATIO 1:2.17 FOR ALL
COACHES EXCEPT ACCN/SG & POWER
CAR WHICH IS 1:2.48
 35mm BRAKE PADS
 JURID 877/BECORIT984 KB & SABWABCO.

23. BRAKE CALLIPER UNIT

24. SECONDARY SUSPENSION
 NEST OF FLEXI-COIL SPRINGS INNER AND OUTER,
RUBBER SPRING AND SECONDARY PAD
 VERTICAL DAMPERS
 LATERAL DAMPERS
 YAW DAMPERS
 ANTI-ROLL BAR
 ANCHOR LINKS

25. SECONDARY SUSPENSION

26. (With Bolster Lifted)
Bogie Bolster
Nested
Secondary
Spring
Assembly
Yaw Damper
Sec. Vertical
Damper
Cross Section

27. (With Secondary Spring System Exploded)
Bogie
Bolster
Miner Pad
Spring Guide
Outer Spring
Inner Spring
Rubber Spring

28. SECONDARY SUSPENSION

30. Lateral Damper
Lateral Bumpstop
Longitudinal Bumpstop
(Bolster removed)

31. Anti Roll Assly
Traction Lever Traction Center
Curve Roll
(X-section lifted)

32. ANTI-ROLL BAR:
 A TORSION BAR WITH TWO FORKS- BETWEEN
BOGIE FRAME & BOLSTER,CONNECTED BY
ROLL LINKS.
 RESISTS ROLLING MOTION OF COACH.
 AS PER UIC515-1 TILTING CO-EFFICIENT <0.4.

33. ANTI-ROLL BAR:

34. A
Anti-roll assly

35. ANTI ROLL BAR

36. BUFFER HEIGHT ADJUSTMENT
 Shims at body/bogie connection.
 Shims NOT added/removed in Primary and
Secondary Suspension for wheel wear compensation
or buffer height adjustment.

37. BOGIE BODY CONNECTION:

38. BODY BOGIE CONNECTION

39. PRINCIPLES OF FORCE TRANSMISSION
 Vertical forces:
 BODY-BOLSTER-MINER PAD-SEC.SUSPENSION-
BOGIE FRAME-PRIMARY SPRINGS/BALL JOINT
CONTROL ARM-AXLES.

40. LATERAL FORCES:
 BODY-BOLSTER-MINER
PAD/SEC.SPRINGS/LATERAL BUMP STOP-BOGIE
FRAME-BALL JOINT CONTROL ARM-AXLES.

41. TRACTION AND BRAKING FORCES:
 BODY-TRACTION
CENTRE-TRACTION
LEVER/LONGITUDINAL
BUMP STOP-BOGIE
FRAME-CONTROL ARM-
AXLES.

42. A
Traction Center

43. CURVE NEGOTIATION:
 CONTROL ARM (SGCI TO IS:1865) CONNECTING
AXLE BEARING AND SIDE FRAME THROUGH
ELASTIC CONNECTION.
 FLEXIBILE GUIDANCE TO WHEELSET.

44. SUSPENSIONS OF VARIANTS
 THE COMMON SUSPENSION GROUPS ARE:
 GS,SCN,SLR
 CC,EC,CB,FAC/EOG,ACCW/EOG.
 ACCN/EOG,FAC/SG,ACCW/SG
 ACCN/SG,WLRRM SIDE 2.
 WLRRM SIDE 1.
 SLR UNDERSLUNG.

45. MAIN DATA:

46. SPEED LIMIT
 Cleared upto 160KMPH.
 upto 200KMPH with magnetic brakes/sintered brake
pads.

47. RIDE INDEX
 CHAIR CAR:
 VERTICAL 2.75
 LATERAL 2.5

48. SELF-GENERATING BOGIE WITH V-
BELT:

50. CARDAN SHAFT ARRGT. FOR
25KW ALTERNATOR

53. THANK
YOU