- Product category：Conventional PDC Bits
- Name：12-1/4"ST635RS
- Product Type：12727
- Hits：1381
Introduction
12-1/4" ST635RS/ M223
Recommended Operating Parameters
| Blade Count | 5 Sprail Blades |
| Primary Cutter Size | Ф16 mm |
| Face Cutters（Count） | Ф16 mm ( 24 ) |
| Cone Cutters（Count） | Ф16 mm ( 9 ) |
| Gauge Cutters（Count） | Ф16 mm ( 8 ) |
| Back-Up Cutters（Count） | Ф16 mm ( 25 ) |
| Nozzles | 7 Standard Series (SP) |
| Gauge Length | 3", Options available |
| Junk Slot Area | 39 in2 |
| Bit Connection | 6-5/8" API REG |
| Bit Length | Make-Up: 14" Overall: 19" |
| Fishing Neck | Diameter: 8" Length: 5.2" |
Recommended Operating Parameters
| Flow Rate | 38~62 LPS |
| Rotary Speed | 60~300 RPM |
| Weight-on-Bit | 20~160 KN |
| Max. Weight-on-Bit | 180 KN |
| Make-Up Torque | 49.6~51.4KN.m |