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I3SR21
Perfect for chain drives which require a tensioning sprocket, and where fixed idlers are preferred. These Idler Sprockets are supplied complete with built-in fully shielded and greased for life ball bearings. These provide lifetime maintenance-free operation and are are offered in two standards; an economy bearing for light duty applications, and a European bearing for higher loads and speeds.
Manufactured from medium carbon steel and secured to the outer race of the bearing by press fit, the extended width inner race also enables correct mounting on the shaft without the need for spacers.
Idler Sprockets can also be manufactured to order to suit other sizes of BS Chains and ANSI Series, in both Simplex and Multistrand construction, and with alternate numbers of teeth.
For specials please ask for a quote;
STK = Stock sizes
SD = Available on short delivery
|
No. teeth |
Pitch |
de |
dp |
A |
Di |
F |
B |
H |
Economy bearing |
INA bearing |
|---|---|---|---|---|---|---|---|---|---|---|
| 23* | 8mm x 3mm | 62.15 | 58.75 | 2.8 | 16 | 40 | 12 | 18.3 | SD | SD |
| 21* | 3/8″ x 7/32″ | 68.00 | 63.90 | 5.3 | 16 | 40 | 12 | 18.3 | STK | STK |
| 22* | 3/8″ x 7/32″ | 71.00 | 66.93 | 5.3 | 16 | 40 | 12 | 18.3 | STK | STK |
| 18* | 1/2″ x 1/8″ | 78.90 | 73.14 | 3.0 | 16 | 40 | 12 | 18.3 | STK | STK |
| 16* | 1/2″ x 3/16″ | 70.90 | 65.10 | 4.5 | 16 | 40 | 12 | 18.3 | STK | SD |
| 18* | 1/2″ x 3/16″ | 78.90 | 73.13 | 4.5 | 16 | 40 | 12 | 18.3 | STK | STK |
| 16* | 1/2″ x 5/16″ | 69.50 | 65.10 | 7.2 | 16 | 40 | 12 | 18.3 | STK | STK |
| 18* | 1/2″ x 5/16″ | 77.80 | 73.14 | 7.2 | 16 | 40 | 12 | 18.3 | STK | STK |
| 14* | 5/8″ x 3/8″ | 78.00 | 71.34 | 9.1 | 16 | 40 | 12 | 18.3 | STK | STK |
| 15* | 5/8″ x 3/8″ | 83.00 | 76.36 | 9.1 | 16 | 40 | 12 | 18.3 | STK | STK |
| 17* | 5/8″ x 3/8″ | 93.00 | 86.39 | 9.1 | 16 | 40 | 12 | 18.3 | STK | STK |
| 13* | 3/4″ x 7/16″ | 87.50 | 79.59 | 11.1 | 16 | 40 | 12 | 18.3 | STK | STK |
| 15* | 3/4″ x 7/16″ | 99.80 | 91.63 | 11.1 | 16 | 40 | 12 | 18.3 | STK | STK |
| 12** | 1″ x 17.02 | 109.00 | 98.14 | 16.2 | 20 | 47 | 14 | 17.7 | STK | STK |
| 13** | 1 1/4″ x 3/4″ | 147.80 | 132.65 | 18.5 | 25 | 52 | 15 | 21.0 | STK | STK |
Bore tolerance: *+0.26/+0.13 **+0/+0.1
All dimensions in mm. Intermediate sizes & special sprockets to drawing up to 1000mm diameter.
Standard: to ISO/R 606 – ANSI B29.1