BOGIES AND SUSPENSION - South Central Railway

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CHAPTER 6 – BOGIES AND SUSPENSION 601 B. CONSTRUCTIONAL DETAILS WAGON MAINTENANCE MANUAL Page 2 of 121 The bogie comprises of two cast steel frames and a floating bolster. The bolster is supported on the side frame through two nests of springs. This also provides a friction damping proportional to load. A fabricated mild steel spring plank connects the side frames. 1000 DIA. ON TREAD 2000 + 5 WHEEL BASE FIG. 6.1 BOGIE GENERAL ARRANGEMENT CASNUB-22W BOGIE 1600 BETWEEN WHEEL FLANGE 2260 JOURNAL CENTRES
CHAPTER 6 – BOGIES AND SUSPENSION The salient features of CASNUB bogie are given below. WAGON MAINTENANCE MANUAL Page 3 of 121 Sr. No Features Description 1. Gauge 1676 mm 2. Axle load 20.3 t, However all bogies except CASNUB 22 HS can be upgraded up to 22.9 t. 3. Wheel diameter 1000 mm (New) 956 mm (New) for Retrofitted CASNUB 22 W 4. Wheel base 2000 mm 5. Type of Axle bearing CASNUB 22W & 22W(M) (i) Cylindrical Roller Bearing Axle Box in a limited number of CASNUB 22W Bogies only. (ii) Standard AAR Tapered Cartridge Bearing Class E suitable for 144.5 x 277.8 mm wide jaws. CASNUB 22NL, 22NLB & 22HS (i) Standard AAR Tapered Cartridge Bearing Class E suitable for 144.5 x 277.8 mm narrow jaw 6. Distance between 2260 mm journal centres 7. Distance between 1474 mm side bearers 8. Type of side bearers CASNUB 22W Roller Type (Clearance Type) Retrofitted CASNUB 22W, CASNUB 22W(M), 22NL, 22NLB Constant contact type (Metal bonded rubber pad, housed inside side bearer housing) CASNUB 22HS Spring loaded constant contact type side bearer. 9. Type of pivot CASNUB 22W IRS Type TOP Pivot- RDSO Drg. No. W/BE-601 Bottom Pivot – RDSO Drg. No. W/BE-602 or similar mating profile integrally cast with bolster. CASNUB 22W(M), 22NL, 22NLB, 22 HS Spherical Type RDSO Drg. No. WD-85079-S/2 10. Anti rotation features Anti rotation lugs have been provided between bogie bolster and side frame 11. Type of brake beam CASNUB 22W, 22NL, 22NLB, 22 HS : Unit type fabricated brake beam supported and guided in the brake beam pockets. CASNUB 22W(M) : Unit Type Cast Steel brake Beam suspended by hangers from side frame brackets. 12. Suspension details Long travel helical spring 13. Elastomeric pads On all types of bogies except CASNUB 22 W.
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