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U| Style | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | For Chain Number | For Chain Pitch | Bore Type | Length Through Bore | Set Screw Size | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 25A18 | 18 | 1.4397" | 1.568" | 25 | 1/4" | Finished Bore | 0.1065" | 1/4"-20 | £22.63 | |
| B | 25A19 | 19 | 1.5189" | 1.648" | 25 | 1/4" | Finished Bore | 0.1065" | 1/4"-20 | £22.85 | |
| C | 25A20 | 20 | 1.5981" | 1.728" | 25 | 1/4" | Finished Bore | 0.1065" | - | £22.85 | |
| D | 25A21 | 21 | 1.6774" | 1.809" | 25 | 1/4" | Finished Bore | 0.1065" | - | £23.07 | |
| E | 25A22 | 22 | 1.7567" | 1.889" | 25 | 1/4" | Finished Bore | 0.1065" | - | £23.27 | |
| F | 25A23 | 23 | 1.836" | 1.969" | 25 | 1/4" | Finished Bore | 0.1065" | - | £23.72 | |
| G | 25A24 | 24 | 1.9153" | 2.049" | 25 | 1/4" | Finished Bore | 0.1065" | - | £23.91 | |
| H | 25A25 | 25 | 1.9947" | 2.129" | 25 | 1/4" | Finished Bore | 0.1065" | - | £24.36 | |
| I | 25A26 | 26 | 2.0741" | 2.209" | 25 | 1/4" | Finished Bore | 0.1065" | - | £25.00 | |
| J | 25A28 | 28 | 2.2329" | 2.369" | 25 | 1/4" | Finished Bore | 0.1065" | - | £25.87 | |
| K | 25A30 | 30 | 2.3917" | 2.529" | 25 | 1/4" | Finished Bore | 0.1065" | - | £25.87 | |
| L | 25A32 | 32 | 2.5506" | 2.688" | 25 | 1/4" | Finished Bore | 0.1065" | - | £30.80 | |
| M | 25A35 | 35 | 2.789" | 2.928" | 25 | 1/4" | Finished Bore | 0.1065" | - | £31.67 | |
| N | 25A36 | 36 | 2.8684" | 3.008" | 25 | 1/4" | Finished Bore | 0.1065" | - | £31.89 | |
| O | 25A40 | 40 | 3.1864" | 3.327" | 25 | 1/4" | Finished Bore | 0.1065" | - | £32.76 | |
| P | 25A42 | 42 | 3.3454" | 3.486" | 25 | 1/4" | Finished Bore | 0.1065" | - | £33.40 | |
| Q | 25A45 | 45 | 3.5839" | 3.725" | 25 | 1/4" | Finished Bore | 0.1065" | - | £33.63 | |
| R | 25A48 | 48 | 3.8224" | 3.964" | 25 | 1/4" | Finished Bore | 0.1065" | - | £34.27 | |
| S | 25A54 | 54 | 4.2996" | 4.442" | 25 | 1/4" | Finished Bore | 0.1065" | - | £35.56 | |
| T | 25A60 | 60 | 4.7768" | 4 23/25" | 25 | 1/4" | Finished Bore | 0.1065" | - | £36.65 | |
| U | 25A72 | 72 | 5.7314" | 5.876" | 25 | 1/4" | Finished Bore | 0.1065" | - | £38.99 |