Home / Knowledge / Guhring RT 100 FB vs Allied Machine Opening Drill
Guhring RT 100 FB vs Allied Machine Opening Drill
Guhring RT 100 FB and Allied Machine Opening Drill are documented holemaking systems with different product architecture and application priorities. Guhring RT 100 FB Series 6596 is a two-flute, coolant-through flat-bottom carbide drill. Opening Drill is an Allied Machine adjustable indexable system for enlarging existing holes without a sequence of boring passes.
Side-by-side comparison
| Category | Guhring RT 100 FB | Allied Machine Opening Drill |
|---|---|---|
| System architecture | Series 6596 is approximately 3xD with a 180-degree point. | Diameter range: 50.80-142.75 mm (2.000-5.620 in). |
| Documented application focus | Flat-bottom holes and low-burr exits. | Enlarging existing holes where eliminating multiple boring passes can reduce cycle time. |
| Technical selection detail | It uses carbide, nano-FIREX coating, internal coolant, and an HA shank. | Four body series divide the diameter range from OP1 through OP4. |
| Primary documented constraint | Series 6596 and micro Series 6496 are not interchangeable. | Opening Drill enlarges a pre-existing hole and is not a substitute for drilling from solid. |
| Manufacturer-guided selection | Store series, EDP, code, diameter, L/D, point, shank, coating, coolant, and catalog revision. | Use Opening Drill when a prepared hole already exists and adjustable large-diameter enlargement is more efficient than repeated boring passes. |
Best fit by application
Guhring RT 100 FB
- Flat-bottom holes and low-burr exits.
- Store series, EDP, code, diameter, L/D, point, shank, coating, coolant, and catalog revision.
Allied Machine Opening Drill
- Enlarging existing holes where eliminating multiple boring passes can reduce cycle time.
- Use Opening Drill when a prepared hole already exists and adjustable large-diameter enlargement is more efficient than repeated boring passes.
Selection notes
Use RT 100 FB when its documented application focus and technical configuration match the operation more closely; use Opening Drill when its documented architecture and constraints provide the better fit.
Compare complete configured assemblies and current manufacturer data rather than treating either family name as one universal item.
Variables to validate
- RT 100 FB: Series 6596 and micro Series 6496 are not interchangeable.
- Opening Drill: Opening Drill enlarges a pre-existing hole and is not a substitute for drilling from solid.
- Normalize diameter or cutter size, reach, interface, work material, machine conditions, coolant, and acceptance criteria before comparing performance or cost.
Official product references
We work to keep this information reliable, but specifications and availability can change. Verify critical details with the manufacturer through the official resources above.