Pointing

Part of Wire Drawing

Tapering the wire end to feed through the die — the essential first step of every drawing pass.

Why This Matters

Every single wire drawing pass begins with pointing — tapering the end of the rod or wire so it can be pushed through the die hole and gripped on the other side with tongs or pliers. Without a proper point, you cannot start drawing. A poor point causes the wire to jam in the die, crack at the shoulder, or break during the first pull.

Pointing seems simple but is actually one of the most common sources of wasted time and material in wire drawing. A point that is too short cannot be gripped. A point that is too long wastes material that must be cut off. A point with cracks or an abrupt shoulder will fracture in the die. A point that is off-center causes the wire to enter the die crooked, producing uneven reduction and curved output.

Mastering the pointing technique saves material, prevents breakage, and keeps production moving. It is a skill worth practicing deliberately rather than treating as a throwaway step.

Pointing Methods

There are four practical methods for creating a point, each suited to different situations.

1. Hammer Pointing (Forging)

The most common method for rod stock and heavy wire above 3 mm diameter.

Procedure:

1. Heat the last 4-6 cm of the rod to forging temperature (bright red to yellow for iron, dull red for copper).
2. Place on the anvil and hammer to a gradual taper, rotating 90 degrees between each series of blows.
3. Work from the rod body toward the tip — do not start at the tip and work back, as this creates a bulge at the transition.
4. The taper should reduce smoothly from full diameter to roughly half the die hole diameter over 3-5 cm.
5. Round the taper by rotating and lightly hammering on all sides. A square taper from flat-anvil work must be rounded.
6. Allow to cool slowly (iron) or quench (copper).

Advantages: Works for any size, produces a strong taper, equipment is basic.

Disadvantages: Requires a forge and anvil, work-hardens the pointed section (anneal if needed), hammer marks can cause cracking.

Smooth Transitions

The most critical feature of a hammer point is the shoulder — the transition from full diameter to the taper. This must be a smooth, gradual curve with no abrupt step. An abrupt shoulder creates a stress concentration where the wire breaks during drawing. Blend the shoulder with light, angled hammer blows.

2. Filing

Best for wire between 1-4 mm diameter that is too small for effective hammer pointing but too large for rolling.

Procedure:

1. Secure the wire in a vise or clamp.
2. File a taper over the last 2-3 cm, rotating the wire frequently to keep the taper centered and round.
3. Use a coarse file for initial shaping, then a finer file to smooth the surface.
4. Check concentricity by rolling the pointed section on a flat surface — it should roll without wobbling.

Advantages: Precise, controlled, no heating required, smooth surface finish.

Disadvantages: Slow for heavy stock, requires a good file, difficult below 1 mm diameter.

3. Rolling Between Plates

Effective for medium wire (1.5-3 mm) and produces an excellent taper with minimal equipment.

Procedure:

1. Place the wire end on a hard, flat surface (stone, iron plate, smooth hardwood).
2. Press a second flat surface (a flat piece of iron or hardwood) on top of the wire end at a slight angle.
3. Roll back and forth while pressing down, applying more pressure toward the tip.
4. The wire end cold-forms into a smooth, round taper.
5. For iron wire, this works best if the wire has been recently annealed — work-hardened iron resists rolling.

Advantages: Fast, no heat needed, produces smooth round taper, minimal equipment.

Disadvantages: Limited to wire soft enough to cold-deform, difficult above 3 mm.

4. Grinding

Used for small wire or as a finishing step after another method.

Procedure:

1. Hold the wire at an angle against a rotating grinding stone or stationary abrasive stone.
2. Rotate the wire continuously while maintaining the angle.
3. Grind until the tip is narrow enough to pass through the die.
4. Finish with a finer abrasive for a smooth surface.

Advantages: Works at any scale, precise control, no heating.

Disadvantages: Slow, wastes material as grindings, can overheat the tip if grinding too aggressively.

Point Geometry

The shape of the point directly affects the success of the drawing pass.

Critical Dimensions

Parameter	Recommended	Too Short	Too Long
Taper length	3-5 cm	Cannot grip with tongs	Wasted material, flexible tip bends
Tip diameter	40-50% of die hole	Jams in die	Insufficient grip surface
Shoulder angle	5-10° half-angle	Abrupt transition, stress fracture	Point too long
Protrusion through die	2-3 cm minimum	Cannot grip	—

Taper Profile

The ideal taper is a smooth, slightly convex curve — slightly fatter at the base, narrowing smoothly to the tip. Avoid:

• Concave tapers — thinnest section is mid-point, creates a hinge that bends and breaks
• Stepped tapers — abrupt diameter changes from flat hammer blows, each step is a potential crack site
• Asymmetric tapers — one side thicker than the other, causes wire to enter die off-center

Concentricity

The point must be centered on the wire axis. An off-center point means the wire enters the die at an angle, which causes:

1. Uneven reduction — one side of the wire is reduced more than the other
2. Curved exit wire — the wire bends toward the thinner side as it exits
3. One-sided cracking — the over-reduced side develops surface cracks
4. Die wear — uneven loading wears one side of the die faster

Test: roll the pointed wire on a flat surface. If the point wobbles or the wire does not roll straight, re-point. A small wobble can be corrected by filing; a large deviation requires remaking the point.

Re-Pointing Between Passes

Every time the wire goes through a new die, it needs a new point — the old point is now a different diameter than the new wire body, and the transition creates a weak spot.

When to Re-Point

• Always before the first pass of a new die size
• After a break — the broken end is irregular and must be pointed
• After annealing — if the pointed section has softened, verify it is still the right shape. Heat can distort thin tapers.

Efficient Re-Pointing

For wire already drawn to moderate gauges (2-4 mm), re-pointing is faster than initial pointing:

1. Flatten and taper — two or three firm hammer blows on the last 2 cm while rotating the wire is usually sufficient.
2. File to clean up — a few strokes to round and smooth the taper.
3. Total time — 30-60 seconds for an experienced worker. This adds up: 12 passes means 12 re-pointing operations, or 6-12 minutes per wire length.

Batch Re-Pointing

Point all your wires for the next die size before starting to draw. This keeps your workflow uninterrupted — point 10 wires, then draw 10 wires, rather than alternating between pointing and drawing for each piece.

Common Pointing Problems

Point Breaks Off During Drawing

Cause: Abrupt shoulder, crack at the transition, or point too thin at the shoulder.

Fix: Re-examine your shoulder technique. The taper must transition smoothly from full wire diameter with no abrupt step. If using a hammer, use lighter blows at the shoulder transition and blend carefully.

Wire Jams in the Die

Cause: Point is too thick — it wedges in the die entrance without passing through.

Fix: File or grind the point thinner. The tip should slide through the die with light finger pressure. If you have to force it, it is too thick.

Point Bends When Gripped by Tongs

Cause: Point is too long and thin, creating a flexible section that bends rather than transmitting pulling force.

Fix: Shorten the taper. The point only needs to protrude 2-3 cm past the die — just enough to grip firmly. Excess length is wasted and creates a weak hinge point.

Wire Exits Curved

Cause: Asymmetric point or off-center entry. The wire was not aligned with the die axis when drawing started.

Fix: Check concentricity by rolling on a flat surface. Ensure the draw plate is perpendicular to the pulling direction. Align the wire by hand before starting to pull.

Surface Cracks at the Shoulder

Cause: The hammered shoulder was not annealed after forging, and the work-hardened zone cracked during drawing.

Fix: After hammer-pointing iron wire, briefly anneal just the pointed section by heating to cherry red and cooling slowly. This softens the forging damage without requiring a full coil anneal. Hold the wire with tongs so only the pointed end is in the fire.

Pointing Fine Wire

Wire below 1.5 mm diameter presents special pointing challenges — it is too thin to hammer effectively and too flexible to file easily.

Techniques for Fine Wire

1. Chemical pointing — dip the wire end in acid (vinegar or dilute mineral acid) to dissolve metal from the tip. The acid attacks the smaller cross-section faster, creating a natural taper. Slow but effective for very fine gauges.

2. Abrasive cord — wrap a piece of cord coated in fine abrasive (sand glued with pine resin) around the wire end and pull back and forth while rotating the wire. This hand-laps a taper onto wire as fine as 0.5 mm.

3. Rolling between smooth stones — place the wire tip between two smooth, flat stones and roll with light pressure. The wire cold-forms to a taper.

4. Twisting and pulling — for very soft metals (copper, gold), grip the last centimeter of wire with pliers and twist while pulling gently. The wire necks down to a taper at the stressed point. Not suitable for iron.

Fine Wire Fragility

Fine wire points are extremely fragile. Once pointed, handle with care — do not bend, kink, or stress the pointed end before drawing. Even setting the wire down carelessly can damage a fine point. Feed directly into the die and begin drawing immediately after pointing.

Tool Requirements

Minimum Pointing Kit

Tool	Purpose	Substitute
Small anvil or flat iron	Hammer pointing surface	Flat stone, steel plate
Light hammer (200-500g)	Forging the taper	Any small hammer
Flat file (coarse + fine)	Shaping and smoothing	Sandstone, abrasive stone
Wire vise or clamp	Holding wire for filing	Wooden jaws in bench vise
Calipers or gauge plate	Checking diameter	Pre-measured holes in hardwood

Forge Setup for Pointing

You do not need a full blacksmith forge just for pointing. A small charcoal fire in a clay-lined pit with hand bellows is sufficient. You only need to heat the last few centimeters of the rod — the rest stays cold. A torch made from twisted grass or a tallow-soaked rag wrapped on a stick can heat the tip of smaller wire without any fixed forge at all.

Pointing Efficiency

An experienced wire drawer spends roughly 5-10% of total production time on pointing. If pointing is taking significantly longer, evaluate whether you are using the right method for your wire gauge, and consider building a dedicated pointing jig — a V-groove in hardwood that holds the wire at the correct angle for filing and ensures consistent taper geometry every time.