Description
Quick Change Tool Posts, Two Styles – Piston and Wedge
- Both are precision engineered to assure repetitive accuracy.
- Advanced design provides built-in quick tool changing versatility with positive rigidity to meet the most exacting tolerances.
- Quickly and easily installed on an engine, bench, or turret lathe for a wide range of operations, from fine precise work to heavy-duty cutting.
- Piston type posts are economical, while the Wedge type posts are clearly ultra-precise. Both accept the tool holders and interchange with Aloris,
Dorian, and DTM Tooling. - Made of Steel
Piston Style
| Item | Model | A | B | C | D | E | H | R | Swing | Code | L | W | H1 | M |
| 0250-0100 | AXA | 2-1/2″ | 3-7/8″ | 2-1/4″ | 9/16″ | 1-7/16″ | 4-11/16″ | 5-3/4″ | 6-12″ | I | 1.850″ | 2.362″ | 0.472″ | M14x1.5 |
| 0250-0200 | BXA | 3″ | 4-5/8″ | 2-3/4″ | 5/8″ | 1-5/8″ | 5-9/16″ | 7-5/16″ | 10-15″ | I | 2.756″ | 2.500″ | 0.630″ | M16x1.5 |
| 0250-0300 | CXA | 3-3/8″ | 5-1/8″ | 3″ | 3/4″ | 1-7/8″ | 6-1/8″ | 7-7/8″ | 13-18″ | I | 2.992″ | 2.992″ | 0.748″ | M20x2 |
| 0250-0400 | CA | 4″ | 6-1/4″ | 3-5/8″ | 7/8″ | 2-1/8″ | 7″ | 9″ | 14-20″ | I | 3.937″ | 2.992″ | 0.984″ | M22x2 |
Wedge Style
| Item | Model | A | B | C | D | E | H | R | Swing | Code | L | W | H1 | M |
| 0250-0111 | AXA | 2-1/2″ | 3-7/8″ | 2-1/4″ | 9/16″ | 1-3/8″ | 4-11/16″ | 5-3/4″ | 6-12″ | I | 2.500″ | 2.244″ | 0.500″ | 9/16″-18UNF |
| 0250-0222 | BXA | 3″ | 4-5/8″ | 2-3/4″ | 5/8″ | 1-9/16″ | 5-9/16″ | 7-5/16″ | 10-15″ | I | 2.992″ | 2.756″ | 0.630″ | 5/8″-18UNF |
| 0250-0333 | CXA | 3-1/2″ | 5-1/8″ | 3″ | 3/4″ | 1-29/32″ | 6-1/8″ | 7-7/8″ | 13-18″ | I | 3.504″ | 2.992″ | 0.748″ | 3/4″-16UNF |
| 0250-0444 | CA | 4″ | 6-1/4″ | 3-5/8″ | 7/8″ | 2-1/8″ | 7″ | 9″ | 14-20″ | I | 3.937″ | 3.622″ | 0.984″ | 7/8″-14UNF |
The difference between wedge style and piston style quick change tool posts lies in their mechanism for holding and locking tools into place on a lathe. Both types are designed to change tools on a lathe quickly and easily without the need to re-zero the tool position each time. Here are the key differences:
Wedge Style QCTP
- Mechanism: Utilizes a wedge mechanism that, when tightened, forces a wedge upward, creating a very tight and secure fit between the tool post and the tool holder.
- Precision and Rigidity: Generally provides superior clamping force and rigidity, leading to better machining accuracy and the ability to handle heavier cuts.
- Cost: Typically more expensive than piston style due to its precision and the quality of machining it can handle.
Piston Style QCTP
- Mechanism: Uses a piston mechanism where a piston expands outward to lock the tool holder in place when the handle is tightened.
- Flexibility and Ease of Use: Often considered easier to use for quick changes, but may not provide as tight a grip as the wedge style, making it less suitable for very heavy or high-precision machining.
- Cost: Generally less expensive than the wedge style, making it a popular choice for hobbyists or operations where extreme precision is not as critical.
The choice between a Wedge and Piston style tool post depends on your specific needs:
- If you require high precision and are working with heavy cuts, a Wedge style may be more suitable.
- If cost is a more significant concern and you’re looking for ease of use for more general machining tasks, a piston style might be the better choice.
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