Flat Wire Conveyor Belt Sprockets: S-Series

Keystone can bore and key your sprockets to YOUR specifications. Our precision production equipment will ensure accuracy and provide you with a quality, hassle-free product.

Fully machined Flangeless sprockets are available for standard duty belts.

Special requirements? Our machine shop can provide special orders upon request. Metric bore sizes are available on all Keystone sprockets.

NOMINAL
DIAMETER NUMBER
OF TEETH SPROCKET
NUMBER MATERIAL PITCH
DIA.(IN)* FLANGE
WIDTH(IN) OVERALL
WIDTH(IN) HUB DIA.(IN) STOCK
BORE** BORE
MIN(IN) BORE
MAX(IN) APPROX.
WT. (LBS)

4 13 13S Cast Iron 4.35 1 1/2 2 1/8 2 1/2 NB 0.75 1.9375 4 1/2

4 13 13SP Plastic 4.35 1 3/4 1 3/4 None MPB 0.75 2.50 3/4

4 13 13S-SS Stainless 4.35 1 3/4 1 3/4 None NB 0.75 2.50 6 1/4

4 13 13M*** Cast Iron 4.35 1 3/4 1 3/4 None NB 0.75 2.00 5 1/2

6 18 18S Cast Iron 6.16 1 1/2 2 1/8 3 3/4 NB 0.75 2.75 10

6 18 18S-LH Cast Iron 6.16 1 1/2 2 1/8 5 CB 2.75 3.50 11

6 18 18SP Plastic 6.16 1 3/8 2 4 MPB 0.75 2.50 1 1/2

6 18 18S-SS Stainless 6.16 1 1/4 1 7/8 3 1/2 NB 0.75 3.00 8 1/2

6 18 18M*** Cast Iron 6.16 1 1/2 2 1/8 3 1/2 NB 0.75 2.50 8 3/4

8 23 23S Cast Iron 7.87 1 1/2 2 1/8 4 NB 0.75 3.50 13 1/2

8 23 23S-LH Cast Iron 7.87 1 1/2 2 1/8 5 1/2 CB 3.50 4.50 15 1/2

8 23 23SP Plastic 7.87 1 3/8 2 5 MPB 1.00 3.00 2 1/4

8 23 23S-SS Stainless 7.87 1 1/2 2 1/8 4 NB 0.75 3.50 14

10 31 31S Cast Iron 10.65 1 1/2 2 1/8 4 1/2 CB 1.25 3.00 18

10 31 31S-LH Cast Iron 10.65 1 1/2 2 1/8 5 1/2 CB 3.00 4.50 20 1/2

12 37 37S Cast Iron 12.68 1 1/2 2 1/8 5 CB 1.4375 3.50 23

12 37 37S-LH Cast Iron 12.68 1 1/2 2 1/8 6 CB 3.4370 4.50 27

* Add 0.375 inches to the Pitch Diameter to get the Overall Sprocket Diameter.
Subtract 0.375 inches from the Pitch Diameter to get the Flange Diameter.
** Stock Bore Notation: NB = No Bore; CB = Core Bore; MPB = Minimum Plain Bore
*** For use with 1/2" x 1" Modified (S6) Belts. Other sizes can be furnished on special order.

13S Sprocket 23SP Sprocket

S-Series Sprockets | T-Series Machined Sprockets
H-Series Sprockets | FL-Series Flangeless Sprockets

P.O. Box 270 - 668 Cleveland Street - Rochester, Pennsylvania 15074-0270
800-446-7205 - (724) 775-2227 - Fax: (724) 775-2739 - sales@keystonemfg.com

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