We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
PrimoChill RFB finishing bit for 12mm OD rigid tubing

PrimoChill

PrimoChill RFB Rigid Finishing Bit 12mm OD DIY Cooling

SKU CH-ECBD-KDTG1

A drill-bit accessory reams, deburrs and trims 12 mm OD rigid tubing for clean custom-loop fits

  • Product typeCPU Block

Model 8mm ID X 12mm OD

  • Drill-bit design fits standard chucks for quick setup
  • Sealed bearings spin without scuffing the tube finish
  • Reams, deburrs and trims 12 mm OD tubing in one tool
  • Adjustable RPM lets you rough-cut then fine-tune length
  • Compatible with PETG and PMMA rigid tubing materials

Essential Tool for Custom Hardline Loops

The PrimoChill RFB Rigid Finishing Bit is a dedicated drill-bit accessory for 12mm OD tubing. It reams, deburrs and trims PETG or PMMA hardline in a single step. Builders creating a custom watercooling loop use it to turn rough-cut tube ends into clean, precise mating surfaces without hand filing.

Consistent Material Removal at Low Speed

Sealed bearings let the bit spin freely in a standard drill chuck at mid to low RPM, producing a smooth, scuff-free finish on every pass. Increasing the RPM lets you fine-tune tube length quickly, so a rough cut can be trimmed to exact size without changing tools. Copper tubing is not recommended because it dulls the cutting edges rapidly.

Low Heat and Vibration in Normal Use

The bearing design minimises friction, keeping the bit and tube cool during extended trimming sessions. Vibration stays low, reducing the chance of micro-cracks in acrylic or PETG. Power draw is limited to whatever the host drill supplies, so no external supply or adapter is required.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 73% of the 609 comparable items (median $15.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Product typeCPU Block

Other versions of this model

5 more in the same range

Questions about this item

How much noise and heat does the Rigid Finishing Bit generate when used continuously in a drill?

The sealed bearings run smoothly at mid-to-low RPM, keeping vibration and heat low during extended reaming or trimming sessions.

What drill or tool must I already own to use the 12 mm OD finishing bit?

Any standard drill that accepts a standard-size bit shank will drive the RFB; no specialised chuck or adapter is required.

Will the bit work cleanly on older PETG or PMMA tubing I already have in stock?

Yes — the bit is designed for PETG and PMMA rigid tubing, so your existing material will finish cleanly; copper tubing is not recommended.

More in Heatsinks & Water Blocks

Similar items