20B-1 (31,75 x 19,56 mm) simplex

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Article	z	De	Dp	d	H	Chain (code)	Designation	P (pitch)	W (internal width)	d (roller)	r	C	h1	L	h2	h3	for Bush
GS 13038	* 38	399.6	384.5	160	51	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	3020
GS 13045	* 45	470.3	455.2	160	51	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	3020
GS 13057	* 57	591.5	576.4	160	51	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	3020
GS 13076	* 76	783.5	768.3	160	51	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	3020
GS 13095	* 95	975.2	960.3	160	76	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	3030
GS 13114	* 114	1167.4	1152.3	240	102	20B-1 (31,75 x 19,56 mm)	1_1/4 x 3/4	31.750	19.56	19.05	32	3.5	18.5	18.2	-	-	4040