Here’s a step-by-step breakdown of the process shown:
- Grinding the Bolt Head (0:00-0:02): A standard hex-head bolt is taken, and its head is slightly ground down using a grinding wheel. This initial grinding might be to flatten the surface or prepare it for subsequent modifications.
- Cutting a Longitudinal Groove (0:02-0:04): The bolt is secured in a vise. A cutting tool (likely a Dremel with a cutting disc or a similar rotary tool) is then used to cut a deep, narrow groove along one side of the bolt’s threaded shaft, extending from just below the head to near the tip.
- Modifying the Bolt Head (0:04-0:08):
- Slotting the Head: A slot is cut across the center of the bolt’s head, perpendicular to the axis of the bolt. This creates a channel.
- Drilling a Pilot Hole: A small hole is drilled through the center of the bolt’s head, intersecting the previously cut slot.
- Preparing the Hose (0:08-0:10): A blue hose is shown connected to a metal fitting. A piece of metal wire is wrapped tightly around the hose, forming a loop. The two free ends of the wire are bent upwards.
- Assembling the Clamp (0:10-0:12):
- The modified bolt is placed over the wrapped wire on the hose.
- The two upward-pointing ends of the wire are inserted into the small drilled hole in the bolt’s head, and then guided into the slot cut across the head.
- Tightening the Clamp (0:12-0:16):
- Two hexagonal nuts are threaded onto the bolt, one above and one below the wire ends that are secured in the bolt head.
- Using two wrenches, the nuts are tightened against each other and the bolt head. As the nuts are tightened, the bolt is pulled upwards, which in turn pulls the wire ends, causing the wire loop around the hose to constrict and create a secure, custom clamp.
This technique effectively transforms a standard bolt into a specialized tool for tightening a wire-based hose clamp, which can be useful in situations where conventional clamps are unavailable or unsuitable.