Best Round Expansion Reamers in 2026

⭐The reamer set are made of high speed steel, high hardness and good toughness, long service life.

⭐With sharp cutting-edge, the chucking machine reamer set have high cutting ability, high accuracy and clean cutting.

⭐This HSS H8 reamer set can process surface of iron, steel, plastic, wood, copper, aluminum and other metal materials.

Premium material - Made of high quality carbon steel with precision cutting edges.

Function - Suitable for taper holes on top of planks, chamfering, easy screw sinking holes. A drill bit can replace a chamfering knife.

Leverage - The reamer is equipped with a T-handle that provides extra leverage to help keep the hole round and easier to ream.

Specifications: Cutting Dia.: 3/8"; Tool flute length: 23.2mm / 0.91"; Overall length: 105mm / 4.13". High-speed steel tool is good for general purpose applications, with combination of hardness and toughness for wear resistance

Uncoated Tool: Features just the base substrate without any additional treatment or coatings, suitable for wide ranges of applications

Round Shank: Can be used with a wide variety of tool holding systems. Reamers are used for light cut, repair work, removing stock or simply for enlarging holes

High speed steel, good toughness and hardness, long service life

Sharp cutting-edge, high cutting ability, high accuracy and clean cutting

Shank Diameter: 3/4/5/6/7/8/9/10mm

【Material】The Adjustable Reamer is made of premium HSS with good hardness and toughness.

【Square End】Square end allows the user to turn the reamer by hand with an adjustable wrench or straight handle tap wrench.

【How to Adjust】Blades are adjusted by loosening one nut and tightening the other.

29 PC Set: 1/16'' through 1/2'' By 64ths, Fractional size; Tolerance: +0.0002" - 0.0000"

Thru 1/2" diameter +.0002" -.0000"

Above 1/2" to 5/8" +.0003" -.0000"

High Speed Steel

Spiral Flute

Bright Finish

A set of Straight flute adjustable hand reamers, 6 flutes per reamer.

Straight Shank

Included Sizes: 15/32" to 17/32", 17/32" to 19/32", 19/32" to 21/32", 21/32" to 23/32", 23/32" to 25/32", 25/32" to 27/32", 27/32" to 15/16", 15/16" to 1-1/16", 1-1/16" to 1-3/16", 1-3/16" to 1-11/32", 1-11/32" to 1-1/2"

[M2 HSS material]: Compared to other commonly used lower grade HSS, M2 has 50% more Tungsten and 150% more Molybdenum, both of which are key elements in improving the durability.

[Spiral Flutes & Safety stop]: Left Helix/Right Hand Cut sheers chips away from operator. Safety collar stop to prevent over penetration and operator loss of stability.

[Tapered point]: allow entry into overlapping holes.

Specifications: Cutting diameter: 1/8", 3/16", 1/4", 5/16"; accuracy class: H7. The hand reamers ream the cylindrical shape. Good for general purpose applications. Straight round shank provides a stable holding and can be used with a variety of tool holding systems.

Material and Coating: Made of high-speed steel, the reamers have combination of hardness and toughness for wear resistance. The cutter body is sturdy and damage-resistant, with strong heat resistance that stable processing. Features just the base substrate without any coatings, suitable for wide ranges of applications.

Wide Applications: Sharp blade for easy cutting and high efficiency. Used for processing, and bore machining. Suitable for accurate reaming in aluminum, cast iron, copper, plastic, wood, alloy, and other soft materials.

High-speed Steel Tool: Good for general purpose applications, offering combination of hardness and toughness for wear resistance

Uncoated Tool: Features just the base substrate without any additional treatment or coatings, suitable for wide ranges of applications

Hand Reamer: Reamer can be hand operated by use of wrenches and used for light cut, repair work, removing stock or simply for enlarging holes

【Making Material of Machine Reamer】：Material- HSS(H7 High Speed Steel)

【Type】- Straight Flute Chucking Reamer Bits

【Wide Application】： The reamer tool is widely used for bore machining, installed in drilling machine, milling machine, etc

👍 Tapered reamers will help align holes, remove burrs from cut pipe, tubing, and Conduit, and enlarge and Countersink holes in sheet metal, plastic, copper, softwoods and other materials.

👍 The heat treated #45 high carbon steel for longer service life.

👍 T-handle design for easy turning and sure handling.

Specifications: Cutting dia.: 2.5mm / 0.1"; tool flute length: 25mm / 1.0"; overall length: 50mm / 2.0"; accuracy: H7. Tungsten carbide tool is hardened to 50HRC, good for general purpose applications

Uncoated Tool: Features just the base substrate without any additional treatment or coatings. Heat treated and quenched for stable performance, suitable for wide ranges of applications

Round Shank: Can be used with a wide variety of tool holding systems. Good for use in through or blind holes and used for light cut, repair work, removing stock

Specifications: cutting diameter: 3/8"; accuracy class: H8. The hand reamers ream the cylindrical shape. Good for general purpose applications.

Material and Coating: Made of alloy tool steel, the reamers have high hardness, durability, and provide finish cuts. Features just the base substrate without any coatings, suitable for wide ranges of applications.

Wide Applications: Used for processing, handicraft processing, and bore machining. Suitable for accurate reaming in aluminum, cast iron, copper, plastic, wood, and other soft materials.

Size: 10pcs, the precision is H8, the diameter of the shank is 3/4/5/6/7/8/9/10/11/12mm (0.12/0.16/0.20/0.24/0.28/0.31/0.35/0.39/0.43/0.47 inch), no additional coating required

Unique Design: The straight flute design allows the chips generated after cutting to collect in the flute, suitable for most applications in shallow cutting. Universal chamfered round shank design, practical and wide-ranging, clamping and tightening, can be used with a variety of tool shank systems

High-Quality Material: The product is made of high-quality high-speed steel, which has higher hardness, heat resistance and wear resistance than ordinary materials, effectively prolonging the use time of the milling machine cutter

The reamer range is 11.75 mm - 29.5 mm (15/32 inch to 1-5/32 inch)

Product includes 9pcs high speed adjustable hand reamers

The adjustable reamer is made of HSS(high speed steel) with good hardness and toughness

???【High quality】 Made from high speed steel, these reamer cutters have high hardness

???【Durable】 Sharp cutting-edge, high cutting ability, high accuracy, long service life

???【Function】 Applicable for reaming to mold processing and handicraft processing

The reamer range is 15/32 inch to 1-1/2 inch.

Product includes 11Pcs high speed adjustable hand reamers H4-H14.

The adjustable reamer is made of HSS(high speed steel) with good hardness and toughness.

High-speed Steel Reamers: Accuracy: H8; Adjustment Range: 11.75mm - 12.75mm (Cutting Diameter); Tool Flute Length: 45mm / 1.77"; Square Shank Size: 6.1mm / 0.24"; Overall Length: 136mm / 5.35". Provides durability, high hardness, good toughness, wear resistance, high temperature resistance, the ability to maintain sharpness over time.

Wide Applications: The reamer is designed to accurately enlarge, smooth or finish holes in stainless steel, cast iron, aluminum, non-ferrous metals, plastic, and wood, widely used in hole repair work, pipe and fittings, woodworking applications.

Hand Reamer: The reamer drill bit can be hand operated by use of a wrench, T-handle wrench, extension rod, drill chuck. Used for light cut, repair work, removing stock or simply for enlarging holes.

Package includes: 1 x Tapered Reamer

Material: High carbon steel, bearing steel

Expanding holes: Ideal for drills to break sheet metal, aluminum plate, plastic and other materials effortlessly.

Specification: Shank Diameter - 3/4/5/6/7/8/9/10mm( 0.12/0.16/0.20/0.24/0.28/0.31/0.35/0.39 inch), Precision - H8

Material: This reamer cutter is made of high-quality high speed steel( HSS ), with high hardness, heat resistance and wear resistance

Straight Flute: Allows chips to collect in the flutes when cutting, well suited for most applications in shallow cuts

Specification: Shank Diameter - 3/4/5/6/7/8/9/10/11/12mm( 0.12/0.16/0.20/0.24/0.28/0.31/0.35/0.39/0.43/0.47 inch), Precision - H7

Material: This reamer cutter is made of high-quality high speed steel( HSS ), with high hardness, heat resistance and wear resistance

Straight Flute: Allows chips to collect in the flutes when cutting, well suited for most applications in shallow cuts

Safety Collar Prevents Over-Penetration and Ensures Safe Operation

30Degree Left Hand Helix Shears Chips Safely Away from Operator

Deburs Welded and Punched Holes

Size Range: 3 Piece Set Includes 5/16" - 9/16", 9/16" - 13/16", 13/16" - 1-1/16"

90° Notch Point starts holes easily

5 hole enlargement steps

【SIZE】Cutting Dia.: 3-4-5-6-7-8-9-10mm, Square shank side:2-3-4-5-6-6-7-9mm.Package include 8 pieces.

【MATERIAL】Made by high speed steel, combination of hardness and toughness for wear resistance.

【CHAMFERED ANGLE DESIGN】Chamfered Angle in the bottem provide orienting effects, ensure axis position and roundness.

★ Chucking Reamer Size --- Cutting diameter: 6mm / 0.236"; shank diameter: 6mm / 0.24"; tool flute length: 25mm / 0.98"; total length: 130mm / 5.12"; accuracy: D4; tool flute type: straight; flutes quantity: 6 flutes

★ Wide Applications --- Widely used for light cuts, repair work, stock removal or just to enlarge holes. Cut or remove the thin layer of metal on the surface of processed holes, mainly to improve the accuracy of the hole and reduce the surface roughness.

★ Straight Flutes --- Straight flute tools allow chips to collect in the flutes. The universal straight and round shank can be used in a variety of tool holding systems. Should be secured in a quality tool holder to prevent the reamer from slipping.