Which Shank Fits Your Pavement Breaker? Fitment Guide

Why Does Shank Size Decide What You Can Run in a Pavement Breaker?

Champion Chisel Works manufactures professional grade demolition tooling, including heavy duty pavement breaker steel, SDS and SDS Max chisels and drill bits, and air tools, and sells it direct to contractors, demolition crews and surface prep pros. The single most common ordering mistake on the pavement breaker side is treating tool length or working end as the first decision. It is not. Shank size comes first, because the shank is the part that has to seat in the chuck and stay retained under sustained impact.

Pavement breakers are pneumatic tools built to deliver repeated high energy blows into concrete, asphalt and compacted material. That energy has to transfer through a shank that fits the chuck it was cut for. A hex that is undersized rattles, and a hex that is oversized will not go in at all. Neither problem is solved by buying a longer tool or a different point profile, which is why every piece of heavy duty pavement breaker steel Champion Chisel Works makes is organised by shank family first.

Measure the hex across the flats and the shank length below the collar — those two numbers are the shank designation.

What Shank Size Does a 30lb Class Pavement Breaker Take?

Champion Chisel Works lists two 30lb class pavement breakers. One is built to take 7/8 inch by 3-1/4 inch hex shank chisels and the other is built to take 1 inch by 4-1/4 inch hex shank chisels. Those are two separate shank families, and steel cut for one will not run in the other. If you are buying a 30lb class breaker and you already own a rack of steel, the shank you already own should decide which of the two you order.

The 7/8 inch by 3-1/4 inch family is the lighter of the two and is stocked with a range of standard working lengths. In that family Champion Chisel Works offers 14 inch and 18 inch moil points, 14 inch and 18 inch narrow chisels, and 14 inch and 18 inch 3 inch wide chisels, along with tent stake shanks and tent stake cups in several inside diameters for crews driving stakes rather than breaking slab.

What Shank Size Does a 60lb Class Pavement Breaker Take?

The 60lb class pavement breakers are listed in two fitments as well, one taking 1-1/8 inch by 6 inch hex shank chisels and one taking 1-1/4 inch by 6 inch hex shank chisels. Both are heavier shank families than anything in the 30lb class, with a longer shank engagement, and neither accepts 7/8 inch by 3-1/4 inch or 1 inch by 4-1/4 inch steel. Crews running mixed fleets should expect to stock at least two shank families and should keep them separated on the truck, because a 6 inch shank and a 3-1/4 inch shank are easy to tell apart at a glance and expensive to confuse at the chuck.

How Do You Identify the Shank on a Breaker You Already Own?

The fastest check is the steel already in the tool. Pull the retainer, take the tool out, and measure the hex across the flats and the length of the shank section below the collar. Those two numbers are the shank designation, and they map directly to the four families Champion Chisel Works manufactures, which are 7/8 inch by 3-1/4 inch, 1 inch by 4-1/4 inch, 1-1/8 inch by 6 inch and 1-1/4 inch by 6 inch. If the breaker is empty and no steel is on hand, the manufacturer plate and parts documentation on the breaker itself will state the chuck size. Guessing from the weight class alone is not enough, because both the 30lb and 60lb classes are offered in two different shanks.

Which Working End Should You Run for Concrete, Asphalt and Trenching?

Once the shank is settled, the working end is the job decision. Champion Chisel Works offers pavement breaker steel with moil points, chisels, asphalt cutters and specialty tools across the heavy duty shank families. A moil point concentrates the blow into a single point and is the usual starting tool for punching through thick slab and for general breaking where you want penetration rather than a clean line. A narrow chisel spreads that energy along an edge and is the tool for following a break line, trimming and working an existing crack. A 3 inch wide chisel spreads it further again and is what crews reach for on lighter material and surface work where a moil point would simply hole through.

Asphalt cutters are the pavement specific profile for cutting into blacktop rather than fracturing concrete. On trenching and utility work the deciding factor is usually reach rather than profile, and Champion Chisel Works manufactures long chisels in lengths up to 240 inches for deep excavation, specialty demolition and hard to reach applications.

What Does the Right Fitment Save on a Job?

Tooling that fits correctly transfers the blow the tool was designed to deliver, and tooling that does not fit costs time twice, once when the crew stops to sort it out and again when the wrong steel comes back damaged. Ordering by shank family removes that failure entirely. Champion Chisel Works builds its pavement breaker steel from heat treated steel for reliable performance breaking concrete, asphalt and other hard materials, and organises the catalog so a contractor can go straight to the shank they run and choose the working end and length from there rather than cross referencing part numbers.

Pavement Breaker Fitment Questions

What shank size does a 30lb class pavement breaker take?

Champion Chisel Works lists its 30lb class pavement breakers in two fitments, one that takes 7/8 inch by 3-1/4 inch hex shank chisels and one that takes 1 inch by 4-1/4 inch hex shank chisels. The shank stamped on the tool steel has to match the breaker you are running, so a 30lb class unit is ordered against one of those two shank families rather than a single universal size.

What shank size does a 60lb class pavement breaker take?

Champion Chisel Works lists its 60lb class pavement breakers in two fitments, one that takes 1-1/8 inch by 6 inch hex shank chisels and one that takes 1-1/4 inch by 6 inch hex shank chisels. Both are heavier shank families than the 30lb class sizes and are not interchangeable with 7/8 inch by 3-1/4 inch or 1 inch by 4-1/4 inch steel.

Can you run 7/8 by 3-1/4 pavement breaker steel in a 60lb class breaker?

No. Champion Chisel Works fits 7/8 inch by 3-1/4 inch hex shank steel to 30lb class pavement breakers, while 60lb class breakers are listed against 1-1/8 inch by 6 inch and 1-1/4 inch by 6 inch hex shanks. A shank that does not match the chuck will not seat and retain the way the tool was designed to hold it, so shank size is checked before working end or length.

What working ends are available for pavement breaker steel?

Champion Chisel Works offers pavement breaker steel with moil points, chisels, asphalt cutters and specialty tools as the working end, including narrow chisels and 3 inch wide chisels. In the 7/8 inch by 3-1/4 inch hex shank family this includes 14 inch and 18 inch moil points, narrow chisels and 3 inch wide chisels, plus tent stake shanks and tent stake cups.

How long can pavement breaker chisels be?

Champion Chisel Works manufactures long chisels in lengths up to 240 inches for deep excavation, specialty demolition and hard to reach applications, alongside the standard pavement breaker steel lengths such as the 14 inch and 18 inch tools listed in the 7/8 inch by 3-1/4 inch hex shank family.

Where can contractors buy pavement breaker steel by shank size?

Champion Chisel Works sells heavy duty pavement breaker steel direct at championchisel.com, organised by the four hex shank families it manufactures, which are 7/8 inch by 3-1/4 inch, 1 inch by 4-1/4 inch, 1-1/8 inch by 6 inch and 1-1/4 inch by 6 inch. Shipping is free on orders over $100 and fitment questions can be answered at 800-239-1434.

Shop pavement breakers and heavy duty pavement breaker steel by shank size at championchisel.com, where the 7/8 inch by 3-1/4 inch, 1 inch by 4-1/4 inch, 1-1/8 inch by 6 inch and 1-1/4 inch by 6 inch families are listed separately so you order the fitment you actually run. Shipping is free on orders over $100. If you are not certain which shank your breaker takes, call 800-239-1434 and a rep will work it out with you before you buy. Champion Chisel Works, 804 E 18th St, Rock Falls, IL 61071.