CNC Reaming

Explore VT machining's CNC Reaming capability. Reaming finishes drilled holes to a precise diameter and smooth surface in a single controlled pass.

Reaming finishes drilled holes to a precise diameter and smooth surface in a single controlled pass. Because the same engineers handle quoting, programming and inspection, nothing is lost between your drawing and the finished part.

Typical tolerance±0.01 mm
Surface finishRa 0.4–1.6 µm
Quantities1 prototype → 100k+
Quote turnaroundUsually < 1 business day
CNC Reaming at VT machining — CNC precision machining services
CNC Reaming — in-house at VT machining

CNC Reaming Capability at a Glance

  • H7 hole tolerance typical
  • Ra to 0.4 µm bore finish
  • Carbide and HSS reamers
  • Pilot-guided accuracy
100% Free tool · No sign-up · Instant 3D

Design your CNC Reaming part online — free 3D + 2D drawing builder

No CAD licence, no sign-up, no cost. Set your metal, dimensions and features in the browser, see the part update live in 3D, switch to 2D to add dimensions and tolerances, then send the drawing straight to our cnc reaming team for a quotation.

  • Live 3D preview — rotate, zoom and explode the model as you type
  • Built-in 2D drawing sheet with dimensions, tolerances and notes
  • Download the preview or send it with your RFQ in one click
  • Free to use, unlimited revisions, nothing to install
VT CNC Machining 3D
CNC Drilling & Tapping Builder Configure drilled, reamed, tapped and counterbored hole patterns in metal plates: single holes, linear arrays, matrix grids or custom coordinates. Every builder includes the Freeform Corner & Region Editor: cut or add material of any shape directly on the 3D model, then submit an RFQ. This tool is for visual configuration only. Final dimensions, tolerances, materials, coatings, and manufacturability will be reviewed from your drawing or specification.
3D PART PREVIEW Visual Specification

CNC Drilling & Tapping Builder

Interactive visual preview for custom CNC machining configuration.

SP SPEC SUMMARY:
Import Code (One-Click Recall)

Save this code before you leave — it is the only way to recall this exact model. If you lose it, your configuration cannot be restored.

SUBMIT RFQ — ENGINEERING REVIEW Your current 3D configuration and specification summary are attached automatically. Attach a drawing if you have one.
Arithmetic verification image

FREQUENTLY ASKED QUESTIONS
What hole patterns can be drilled or tapped?

Single holes, linear arrays, matrix grids or custom coordinates, as through, blind or counterbored holes. Holes can be drilled, drilled and reamed, or drilled and tapped with metric (M2-M10) or UNC/UNF threads.

How accurate are hole positions?

Hole position tolerance is captured as an engineering requirement and confirmed at review; positional tolerances in the +/- 0.02 to 0.05 mm range are routine for CNC drilling.

Prefer the full-screen version, or need a different process? Open the full Free 3D + 2D Builder

What Is CNC Reaming?

CNC Reaming is a subtractive process in which a rotating multi-flute cutter removes material from a fixed workpiece to create flat faces, pockets, slots, bosses, holes and free-form 3D surfaces. Because the tool can approach from several directions on 3-, 4- and 5-axis machines, complex prismatic parts are produced in very few setups.

VT machining runs CNC Reaming in-house, so scheduling, quality and revisions stay under one roof. Reaming finishes drilled holes to a precise diameter and smooth surface in a single controlled pass — and the parameters are set from your material and geometry, not a default recipe. Send a CAD model or a 2D print and we will confirm feasibility, tolerances and lead time before you commit.

How CNC Reaming Works at VT machining

Rotating multi-flute cutters remove material as the metal workpiece is driven through programmed tool paths on 3-, 4- or 5-axis machining centres. Climb milling, step-over and depth-of-cut are set so chip load stays in the ideal band for the alloy.

Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.

  1. 1

    Send your drawing

    CAD model, PDF print — or a drawing you build free on this page. We reply with feasibility, price and lead time.

  2. 2

    CAM programming & work-holding

    Tool paths, fixturing and cutting strategy are planned around the critical features.

  3. 3

    CNC Reaming run

    First article is verified against the print before the balance of the batch is released.

  4. 4

    Inspection & dispatch

    In-process checks plus final inspection, with CMM reports, mill certs and FAIR on request.

CNC Reaming Tolerances & Surface Finish

For CNC Reaming, dimensional and positional tolerances around ±0.01 mm are routine, tightening toward ±0.005 mm on precision setups. Surface finish on machined faces typically falls in the Ra 0.4–1.6 µm range depending on tooling and pass strategy.

Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.

CNC Reaming — capability summary
Max part envelopeUp to 1000 × 600 × 500 mm
Axes3-axis, 4-axis indexed, simultaneous 5-axis
Linear tolerance±0.01 mm standard, ±0.005 mm precision
Surface finishRa 0.4–1.6 µm as machined
Wall thicknessDown to 0.5 mm (alloy dependent)
Lead timePrototypes 5–10 days · production 10–20 days
DocumentationDimensional report, material certificate, FAIR on request

Figures are typical in-house capability. Send your drawing and we will confirm what is achievable for your specific part.

CNC Reaming by Metal — Choose Your Material

Choose a metal below for grade-level detail, achievable tolerances and typical parts in that material.

Design Tips for CNC Reaming

Small design adjustments often cut cost and lead time. Generous internal radii, sensible pocket depth-to-width ratios and avoiding very thin unsupported walls all reduce cost and improve accuracy in metal. If you send your model early, we will return practical DFM feedback before you commit to production.

Secondary Operations & Finishing

Most metal parts need some finishing, which we manage in-house or through vetted partners. Options include deburring and edge-breaking, heat treatment, surface grinding, polishing, and plating or anodising for corrosion resistance and appearance. Give us the finished-part requirement and we will sequence every operation correctly.

CNC Reaming Quality & Inspection

Quality is built in, not inspected on. We monitor key features during the run and confirm them at final inspection, with CMM verification available for tight tolerances. We provide the inspection and traceability records your quality system requires.

Industries That Order CNC Reaming

CNC Reaming parts made by VT machining go into the sectors below. Each page lists the typical components, preferred alloys and the tolerance expectations for that industry.

CNC Reaming in the Shop

Related Milling Processes

Other CNC Services

How to Order CNC Reaming

Ordering metal parts is straightforward. Provide the drawing, material, quantity and any certification needs. Our engineers reply — in English — with feasibility, pricing and a realistic lead time, usually within one business day.

Have a drawing ready? Send it with your quantity and material for a quotation, usually within one business day.

Request a Quote

Frequently Asked Questions

Does CNC Reaming require dedicated tooling?

Most CNC Reaming work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.

What surface finish is achievable on with CNC Reaming?

Surface finish on the part is controlled to your specification; we confirm the achievable Ra against your callout.

Can VT machining make custom parts to my drawing?

Yes. CNC Reaming is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.

What is CNC Reaming and how is it done?

CNC Reaming refers to reaming finishes drilled holes to a precise diameter and smooth surface in a single controlled pass. VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.