► Starrett | Bore Rods

Accurate Internal Measurement for Work That Demands Tight Tolerances Internal dimensions don’t forgive mistakes, which is why bore measurement has to be spot on. Starrett Bore Rods give machinists, fitters & inspectors the accuracy needed for deep bores, long cavities & internal runs where other tools can’t reach cleanly. When...

Accurate Internal Measurement for Work That Demands Tight Tolerances

Internal dimensions don’t forgive mistakes, which is why bore measurement has to be spot on. Starrett Bore Rods give machinists, fitters & inspectors the accuracy needed for deep bores, long cavities & internal runs where other tools can’t reach cleanly. When the job depends on consistent spacing, controlled depth or precise inside diameter checks, these rods bring stability to the measurement you rely on.

Most machinists have dealt with tools that flex, stick or drift when extended into deep bores. Starrett avoids those problems with rods that keep straightness, maintain feel & transfer measurement cleanly back to the gauge or micrometer. When you’re inside a bore that already fights back with heat, expansion or tight walls, you want a rod that won’t add its own problems.

Shops that already use Cylindrical Roller Bearings, Machine Screws, or Punch & Chisel Sets will appreciate how these rods support tight mechanical fits. They help confirm bore size before assembly, check wear during rebuilds & support QC inspections where accuracy is the only acceptable outcome.

Workbenches that stay organized often store these rods inside Foam Tool Inserts, place them near Lockable Security Chests, or keep them alongside Hydraulic Equipment to avoid damage. Clean storage prevents tiny dents or marks that could throw readings off.

What’s in This Collection:

► Starrett Bore Measuring Rods
‣ Suited for checking internal diameters, long-depth measurement & precision bore work.

► Starrett Extension Rod Sets
‣ Designed to increase reach while maintaining straightness & consistent measuring feel.

► Starrett Replacement Bore Rods
‣ Used as swap-in components for worn or damaged rods needing restoration of accuracy.

► Starrett Rod Accessories
‣ Helpful for securing rods to micrometers, indicators or multi-part bore gauges.

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Precision Inside the Bore When Access Gets Tight

Internal measurement is rarely convenient. You’re reaching into narrow cavities, working around edges you can’t see clearly, feeling for contact points that must stay consistent & reading tools that respond to the slightest change in pressure. Starrett Bore Rods make that challenge manageable with stable contact points, strong rigidity & a feel that doesn’t change mid-measurement.

Once these rods become part of your measuring routine, internal checks move faster. You stop hunting for the right feel. You stop wondering whether the rod flexed. You stop second-guessing the reading because the tool finally behaves consistently. That confidence matters when tolerances close in, materials resist machining or the part runs deep enough that visual cues disappear.

To complete a bore inspection setup, machinists often pair these rods with Measuring & Leveling Tools, Grinding & Cut-Off Wheels for cleanup work, Precision Straight Edges, or Scriber Tools for layout reference. That combination builds a workflow that captures, verifies & confirms internal dimensions efficiently.

Support stays available when equipment needs adjustment. Trade support Solutions helps match rod sets to gauge systems, while On-site & workshop Services assist when measurement stations require calibration or rebuild attention.

► Strong rigidity that prevents flex in deep cavities
► Reliable feel for consistent internal diameter checking
► Stable connection with gauges & micrometers
► Built for tough workshop conditions & demanding accuracy

Inside Measurements Need Tools That Won’t Lie

When the bore goes deep or the tolerance gets tight, Starrett Bore Rods keep the measurement straight, clean & dependable from first contact to final reading.

Frequently Asked Questions

Yes. Their rigidity holds up well when handled correctly.

Not when they’re matched to the correct bore size & locked properly.

Only if buildup is left on the rod. A quick wipe keeps readings clean.

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Starrett

Starrett