IBLS Wheel Standard

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1981 Version

From the "IBLS Wheel Standards" published in the October 1981 issue of Live Steam Magazine.

IBLS Wheel Standard 1981.jpg



Finger Lakes Live Steamers, Inc.

Wheel Standards

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KEY TO DIAGRAM

TG
(Track Gauge)

T
(Tire Width)

W
(Flange Width)

F
(Flange Depth)

R
(Fillet Radius)

B
(Back to Back)

G
(Wheel Gauge)

H*
(Coupler Height)

PROTOTYPE

56.500

5.500

1.156

1.125

0.688

53.380

55.692

?

1:32 Scaled Prototype

1.766

0.172

0.036

0.035

0.022

1.668

1.740

 

Gauge No. 1 Standard

45mm
+0/-0.5

6mm
+0/-0.5

1.5mm
+0/0.5

2mm
MAX.

0.5mm
MIN.

40mm
+0.5/-0

43mm
Ref.

34mm
British

Gauge No. 1 Standard

1.772
+0/-.020

0.236
+0/-.020

.060
+0/-.020

0.079
MAX.

.020
MIN.

1.574
+.020/-0

1.694
Ref.

1.125
Kadee 

1:16 Scaled Prototype

3.531

0.344

0.072

0.070

0.043

3.336

3.481

 

3/4 Inch Scale Standard

3.500
MIN.

0.406
MIN.

0.094
MAX.

0.094
MAX.

0.047
+/-.008

3.281
+.020/-0

3.470
+0/-.020

2.250

1:12 Scaled Prototype

4.708

0.458

0.096

0.094

0.057

4.448

4.641

 

1 Inch Scale Standard

4.750
MIN.

0.505
MIN.

0.125
MAX.

0.140
MAX.

0.062
+/-.010

4.437
+.020/-0

4.690
+0/-.020

2.875

1:8 Scaled Prototype

7.062

0.688

0.144

0.141

0.086

6.672

6.962

 

1-1/2 Inch Scale Standard
 North East.

7.250
MIN.

0.750
MIN.

0.156
MAX.

0.187
MAX.

0.094
+/-.015

6.870
+.020/-0

7.190
+0/-.020

4.4375

1-1/2 Inch Scale Standard
West & South. 

7.500
MIN.

0.750
MIN.

0.156
MAX.

0.187
MAX.

0.094
+/-.015

7.120
+.020/-0

7.440
+0/-.020

4.4375

Notes:

All Dimensions are in Inches, unless otherwise noted.

H* - Top of Rail to Center-Line of Coupler.

Background

In 1978-1979 there was a "Blue-Ribbon" committee formed of SIX (6) individuals who were asked to meet and put together a defined list of "BLS WHEEL STANDARDS". These individuals, known to many in our Fraternity, were as follows:

The efforts of this group resulted in the BLS Standards, They were presented with the "10th Annual Live Steam Magazine Award" on December 1, 1979 by the late William C. Fitt, then-Editor of Live Steam Magazine.

These "Interim IBLS Standards" have been widely adopted and have become the accepted wheel standards for the hobby.

Endorsements

The following organizations use, recommend or endorse the IBLS Wheel Standard.

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