Controlled Striking, Marking & Pin Removal

A hammer supplies the force. The punch or chisel decides where that force goes. Starrett punches & chisels give machinists, mechanics, fabricators, maintenance crews & workshop technicians purpose-built tools for marking drill starts, driving pins, aligning holes, transferring hole locations & carrying out controlled striking work.

The difference between punch types matters. A centre punch establishes a drilling point, while a drive pin punch transfers hammer force into a pin. Drift punches help bring holes into alignment, while roll pin punches are designed around the hollow construction of roll pins. Pair them with Hand Tools for everyday striking equipment or explore Car Repair & Maintenance when the job involves mechanical disassembly, pins, shafts & workshop repairs.

Don't choose the punch because it fits in the hole. Choose it because its tip, diameter & purpose match the work.

What Are Starrett Punches & Chisels?

Striking Tools Designed Around the Job at the Tip

Punches concentrate controlled striking force into a specific working area.

Depending on their design, they can establish a drilling point, drive a pin, transfer a hole centre or help bring components into alignment.

Starrett punch types include:

► Centre punches for establishing drilling points
► Automatic centre punches for marking without a separate hammer strike
► Prick punches for fine layout marks
► Drive pin punches for driving suitable solid pins
► Long drive pin punches for deeper or less accessible pin locations
► Roll pin punches for driving hollow roll pins
► Transfer punches for transferring the centre of an existing hole onto another component
► Drift punches for helping align corresponding bolt or rivet holes
► Nail punches for setting suitable finishing nails below a surface

Chisels solve a different striking problem. Rather than locating a point or transferring force into a pin, a suitable chisel concentrates the blow along a cutting edge.

That makes the basic selection question straightforward:

Do you need to mark, drive, align, transfer or cut?

Why Choose Starrett Punches & Chisels?

The Working End Determines the Job

Punches can look deceptively similar in the toolbox.

Their tips aren't interchangeable.

A centre punch uses a pointed end to form an indentation.

A drive pin punch uses a flat-ended cylindrical working section sized around the pin being moved.

A drift punch uses a taper to help align holes.

A roll pin punch incorporates a small projection intended to support the hollow roll pin during driving.

A chisel presents a cutting edge to the work rather than a pin-driving or marking tip.

Using the correct geometry improves control & reduces the chance of damaging the punch, pin, fastener or surrounding component.

Controlled Striking Starts With Correct Sizing

A punch needs enough material behind the working end to withstand the strike while still fitting the application.

Too large & it may not engage the component correctly.

Too small & the force may be concentrated poorly or the punch may become more vulnerable to bending.

Drive pin punches are available across different diameters, with longer versions providing additional reach where the pin sits deeper inside an assembly.

Size should follow the pin — not whichever punch happens to be free.

Striking Tools Need More Than a Hard Tip

Impact tools deal with competing demands.

Their working ends need to perform their intended task while the tool itself must withstand repeated striking.

Correct punch selection, hammer size, work support & striking technique all contribute to how the tool performs.

Even a quality punch can be damaged if a small diameter is subjected to excessive sideways load or an oversized hammer.

Common Applications

Machine Maintenance & Component Disassembly

A seized assembly rarely comes apart as neatly as the drawing suggests.

Pins can be tight.

Corrosion can increase resistance.

Access can be awkward.

A correctly sized drive pin punch directs force into the pin rather than relying on improvised screws, drill bits or other unsuitable objects.

Long drive pin punches become useful when the pin sits farther inside an assembly or surrounding components prevent a standard punch from maintaining useful reach.

Workshop Equipment supports the wider bench, machine-shop & maintenance environment around this work.

Automotive Repair

Pins, retainers & mechanical assemblies make punches useful throughout automotive workshop work.

The key is identifying what you're actually driving.

A solid pin calls for a different approach from a hollow roll pin.

A stubborn component may also need cleaning, penetrant or better support before increasing hammer force.

A Day With An Automotive Mechanic Peninsula looks more broadly at the equipment demands inside an automotive workshop.

Fabrication & Drilling

A drilling error can begin before the drill rotates.

On suitable material, a centre punch creates an indentation that gives the drill point a more positive starting location & helps reduce wandering across the surface.

For finer layout positioning, a prick punch can establish the initial location before that mark is enlarged appropriately for drilling.

Once the drilling point has been established, Metal Cutting & Grinding Tools supports the broader metalworking process.

Hole Pattern Transfer

Duplicating an existing hole pattern by measuring every centre individually creates another opportunity for error.

A transfer punch takes a more direct approach.

The punch body fits the existing hole so its point can mark the corresponding centre onto the mating workpiece.

That makes transfer punches useful for:

► Brackets
► Plates
► Fixtures
► Machine components
► Replacement parts
► Fabricated assemblies

The existing component effectively becomes the template.

Structural Assembly & Hole Alignment

Two fabricated components can be dimensionally correct yet still resist fastener installation because their holes don't line up cleanly.

A drift punch uses its tapered form to help bring corresponding holes into alignment before the fastener is installed.

This is an alignment task — not a pin-removal task.

For assemblies relying on mechanical fixing after alignment, Structural Fasteners & Bolts connects hole alignment with the final fastening stage.

Workshop Chiselling & Material Removal

Chisels concentrate hammer force along a cutting edge.

Depending on chisel type, workpiece & application, they can be used for controlled cutting, separation, trimming or material removal where manual striking is appropriate.

The chisel should be selected around:

► Material being worked
► Type of cut or removal required
► Cutting-edge geometry
► Access to the work
► Hammer size
► Condition of the cutting & struck ends

Increasing hammer size won't correct an unsuitable or damaged cutting edge.

Product Selection Guide

Decide What the Strike Needs to Achieve

Centre Punch or Automatic Centre Punch?

A conventional centre punch is positioned at the required location & struck with a suitable hammer.

An automatic centre punch contains an internal striking mechanism. Downward pressure activates the strike without requiring a separate hammer blow.

An automatic format can be useful for repetitive marking, one-handed operation & locations where simultaneously holding a punch & swinging a hammer is inconvenient.

A conventional centre punch remains a straightforward option where the operator wants direct control over the hammer strike.

Centre Punch or Prick Punch?

They're related tools with different jobs.

A prick punch creates a finer mark for accurately locating layout points.

A centre punch creates a more substantial indentation suitable for establishing a drill start.

Where precision layout matters, the finer mark can establish the location before the drilling point is developed.

Drive Pin Punch or Drift Punch?

This distinction prevents a lot of misuse.

A drift isn't simply a tapered drive punch.

If the objective is removing a pin, use the appropriate pin-driving tool.

If the objective is bringing two holes into line, that's drift work.

Standard or Long Drive Pin Punch?

Choose according to access & driving depth.

A standard drive pin punch suits work where the pin remains accessible through its available working length.

A longer punch provides additional reach where the pin sits farther inside an assembly.

Extra length isn't automatically an advantage.

Long, slender punches can be more vulnerable to bending when poorly aligned or overloaded, so use only the reach the application requires.

Why Use a Roll Pin Punch?

Roll pins are hollow.

That changes how the punch should contact them.

A dedicated roll pin punch uses a small central projection to help locate & support the hollow pin during driving.

Using an unsuitable flat-ended punch can damage the roll pin or allow the punch to enter the hollow centre.

If the assembly uses a roll pin, identify it before reaching for the hammer.

Steel or Brass Punch?

Steel punches suit normal driving applications where strength & durability are required.

A brass punch can be useful where a softer punch material helps reduce the likelihood of marking a more delicate component.

The decision depends on the force required, component material & surface you're trying to protect.

Don't choose brass purely because the component looks expensive — make sure the softer punch is suitable for the actual driving load.

Punch or Chisel?

Use a punch when the strike needs to act through a point or relatively small face for marking, pin movement, transfer or alignment.

Use a chisel when the strike needs to act through a cutting edge to remove, separate or shape suitable material.

If the job involves cutting rather than driving, changing hammer size doesn't turn a punch into a chisel.

Expert Tips

Support the Work Before You Strike It

A punch transfers force through the component.

If the workpiece moves or flexes, part of the hammer blow is lost before it reaches the pin.

Support the assembly appropriately & make sure the pin has somewhere to travel.

Don't Start With the Biggest Hammer

More force isn't automatically better.

Smaller-diameter punches can be particularly vulnerable to bending when overloaded or struck off-centre.

Start with controlled blows using a hammer suited to the punch & application.

If nothing moves, find out why before simply hitting harder.

Give Corrosion Time to Release

A rusted pin can resist far more than the original assembly required.

Cleaning exposed contamination & applying a suitable penetrant where appropriate may help before another removal attempt.

Tool Maintenance Kit supports the cleaning & maintenance side of workshop repair work.

For broader care practices, How To Clean Your Gear Without Ruining It covers keeping working equipment serviceable without introducing avoidable damage.

Keep the Punch Square to the Work

Side loading turns a straightforward striking job into a bending load.

Position the punch correctly before striking & recheck alignment as the pin moves deeper into the assembly.

The smaller & longer the punch, the more important that becomes.

Change Punches as the Job Changes

The punch that starts a pin moving isn't necessarily the tool needed throughout the complete removal.

As access, depth or exposed pin length changes, a different punch size or length may become the better choice.

Treat pin removal as a sequence rather than forcing one tool through every stage.

Check Where the Pin Is Going

Before driving a pin, look at the opposite side of the assembly.

Is there enough clearance?

Is another component blocking the exit?

Could the pin fall into machinery or an inaccessible cavity?

A punch can move the pin exactly as intended & still create another problem if nobody checks the exit path.

Preserve the Intended Tip Geometry

Centre punches, prick punches, roll pin punches & chisels rely on different working-end shapes.

If maintenance or dressing is appropriate for the particular tool, preserve the intended geometry rather than grinding every damaged tip into the same point.

Remove Damaged Striking Tools From Service

Inspect the struck end & working tip.

Heavy mushrooming, cracking, bending or other damage should not be ignored simply because the tool still fits in the toolbox.

Repeated impact makes tool condition a safety issue as well as a performance issue.

Protect Eyes & Hands Before the First Blow

Striking work can produce chips or fragments from the tool, workpiece or surrounding material.

Use appropriate PPE & keep hands clear of the expected hammer path.

Work Safety Protections supports the wider protection requirements around workshop & site impact work.

For crews dealing with unexpected mechanical failures, Emergency Worksite Breakdown Support looks at preparing equipment & support before downtime becomes more expensive.