Drop spindle rotor question

[corn]

how can you tell if a set of drop spindles are for 1" or 1 1/4" rotors? Im sure its a spindle diameter measurment but dont know what the differences are. Any help?

[GREASEMONKEY72]

the only way i can think of is to measure it by hand but somebody will enlighten us all soon

[corn]

Was planning on using my caliper but...

[68shortfleet]

IIRC those two different rotors use different bearing I.D. so the spindle would also reflect that.

Jason

[corn]

I appreciate the help here & not trying to sound mean, but I already said everything in my first post that was responded here. I need the measurements of the 2 sizes. Thank you...

[FLEET72]

Originally Posted by cornfed63

I appreciate the help here & not trying to sound mean, but I already said everything in my first post that was responded here. I need the measurements of the 2 sizes. Thank you...

After doing a little research I found out that "light duty brakes" equipped trucks use BR6 inner bearings and "heavy duty brakes" use BR5 inner bearings. Both use BR3 outer bearings.

From the SKF online catalog:

BR5
CAT-MSG TAPERED ROLLER BEARING-SET
CONE-LGTH 0.7200
CONST CUP&CNE
CUP-LGTH 0.5500
CUP-RAD 0.0500
GEN-MSG1 LM48548/LM48510
ID 1.3750
OD 2.5630
PRI A
PRI-PRNT Y
RAMS 4110
SMAC 5003
STANDOUT 0.1600
WEIGHT 0.5800
WIDTH 0.7100


BR6
CAT-MSG TAPERED ROLLER BEARING-SET
CONE-LGTH 0.6600
CONST CUP&CNE
CUP-LGTH 0.4650
CUP-RAD 0.0500
GEN-MSG1 LM67048/LM67010
GEN-MSG2 COMPONENT OF KIT 23
ID 1.2500
OD 2.3280
PRI A
PRI-PRNT Y
RAMS 4110
SMAC 5003
STANDOUT 0.1600
WEIGHT 0.4200
WIDTH 0.6250

Sources and search criteria:
Parts America
SKF on-line catalog
1972 C10 2WD 402ci 4sp manual

[corn]

FLEET72, you are the man! Thank you...corn