When high precision isn’t critical, choose these V-blocks to hold and position round workpieces. Made from cast iron, they’re a solid, stable choice in high vibration areas. They’re made in pairs to ensure their height, faces, and grooves match, so your workpiece sits level and parallel across both. However, they’re not machined to the same tight tolerances as steel and granite V-blocks. They’re also not as strong as steel under heavy loads, so they may deform or crack over time.

V-blocks with 4 vees have different-sized grooves on each side to support a range of diameters.

Place into larger V-blocks to hold small shafts and cylinders. Set includes two clamps that fit different workpiece diameters.

To hold and support large or small round or cylindrical workpieces, position these two-piece V-blocks to accommodate any diameter. They are a good choice when frequently changing workpiece sizes.

Use this block to hold workpieces at precise angles. Adjust the block to the desired angle, then tighten the set screw on the bottom of the block to lock it in place.

Magnetic surfaces on the bottom, back, and one V face of these blocks eliminate the need for mounting clamps and bolts. Turn the lever to switch the magnetic force on and off.

With vees in three different sizes, these blocks can support rods and shafts in a wide range of diameters. They’re precision ground in pairs to tight tolerances, so their heights, faces, and grooves are perfectly matched. When you rest your workpiece across two blocks, they’ll keep the centerline level. Made of hardened steel, they resist wear, so they’ll stay precise even with heavy use.

Set these V-blocks onto a magnetic chuck or plate to lock metal workpieces in place—no fussing with clamps or bolts. Made of alternating layers of iron and stainless steel, these blocks conduct the magnetic field through their body and channel it straight into your workpiece. They’re often used to cradle rods, shafts, and irregularly shaped parts during grinding and inspecting. Each layer is entirely fused together with copper brazing, so you can machine these blocks without the layers separating. Compared to blocks made from aluminum or brass, these blocks are harder and more dent-resistant, so they hold their shape over time.

Matched pair blocks are ground together, so their heights, faces, and grooves are identical. When you rest your workpiece across the two blocks, they keep the centerline level.

Made in pairs, these V-blocks are precision ground to tight tolerances for straight sides, square corners, and centered grooves. Since their top surfaces are perfectly matched, they keep the centerline of your workpiece level and parallel. These blocks are often used to precisely align round workpieces for measuring or inspecting. They come with a certificate traceable to NIST confirming their accuracy. Unlike metal blocks, these black granite blocks don’t rust or warp from temperature changes. They’re also nonmagnetic, so they won’t interfere with sensitive electronic equipment.

Inspection Grade A blocks are used for general inspections and quality-control work. They’re slightly less precise than Grade AA blocks.

Laboratory Grade AA blocks have the tightest tolerance for the highest level of accuracy. They’re best for inspections and quality-control work in calibration labs.