Widia Gtd
Widia Gtd VTSFT-TC5557 Spiral Flute Tap M8x1 Bottoming 2 Flutes Metric Fine
Creates M8×1 metric-fine threads with a 17.5 mm thread length and 69.1 mm overall length in high-speed steel
- Spiral flutes clear chips efficiently in blind holes
- M8×1 metric fine thread fits precise automotive fasteners
- Bottoming chamfer cuts full threads to the hole bottom
- High-speed steel with black oxide resists wear during repeated use
- 1 mm overall length reaches deep threaded holes
M8×1 Bottoming Tap for Metric Fine Threads
The Widia VTSFT-TC5557 is a high-speed steel spiral-flute tap designed to cut M8×1 metric fine threads in blind holes. Its bottoming chamfer and black oxide finish suit production and maintenance work where full thread depth is required. Machinists and toolroom technicians use it on steel and stainless alloys.
Replaces Worn or Incorrect Taps in Blind-Hole Jobs
Switch to this tap when an existing tool no longer holds size, chips clog the flutes, or a plug chamfer cannot reach the bottom of the hole. The 17.5 mm thread length and D5 limit cover standard 6H class fits. The jump is worth it when thread gauge failures or broken taps slow the cycle.
Straightforward CNC or Hand Rigid Tapping
Clamp the tap in a synchronous holder or rigid collet and run at the recommended speed for high-speed steel. Use a 7.00 mm drill for the 75 percent thread depth and apply cutting fluid to prevent built-up edge. The three flutes evacuate chips upward, but chip packing remains the main failure mode if peck cycles are skipped.
Highlights
- Spiral flutes clear chips efficiently in blind holes
- M8×1 metric fine thread fits precise automotive fasteners
- Bottoming chamfer cuts full threads to the hole bottom
- High-speed steel with black oxide resists wear during repeated use
- 1 mm overall length reaches deep threaded holes
Specifications
| Brand | WIDIA |
|---|
Questions about this item
What drill size is required for the M8x1 thread on the VTSFT-TC5557 tap?
A 7.00 mm drill is specified for 75 percent thread engagement with this M8x1 tap.
How do you correctly start the VTSFT-TC5557 bottoming tap in a blind hole?
Drill the hole to 69.1 mm overall depth, then enter the tap straight with steady pressure; forcing it crooked breaks the 17.5 mm thread length.
When should the VTSFT-TC5557 tap be replaced?
Replace it when the three flutes show worn cutting edges or the black oxide coating has worn off the thread form.
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