Reamer Bits

When completing high-performance projects that require the forming of precise holes in or through materials, the sides of the hole may require additional work to ensure they are completely smooth. In this case, reamers are designed to completely smooth the hole to a high degree of accuracy.


Due to the removal of the uneven material, reaming will slightly enlarge the hole you have created, therefore making it advisable to form the initial hole fractionally smaller to allow for the reaming space – this is called the allowance. It is recommended that the drilled hole should not be enlarged by more than 5% of the drilled diameter.


Typically made from carbide or high-speed steel (HSS), these multi-edged rotary cutting tools are used in metalworking for enlarging and finishing holes to a high level of precision and accuracy.


What types of reamer are there?


At RS Components, we have both machine reamer bits and hand reamer bits. The main difference between the two is that hand reamer bits have a longer taper or lead in at the front end of the bit, which compensates for the difficulty of using hand power alone.


Straight reamer bits are used to make only minor enlargements to holes, typically ones used for the force-fitting of location dowel pins or for unthreaded shoulder bolts.


With helical/spiralled reamer bits, a clockwise reamer will pull any debris up and out of a blind hole, whereas an anti-clockwise reamer will push debris forward, which can be helpful when creating a through-hole.


A tapered reamer is used to make a tapered hole for a tapered pin, which is a self-tightening device due to the shallow angle of the taper. They are commonly used in aircraft assembly and may only be re-reamed a small number of times during an aircraft’s career.


Combination reamers have two or more cutting surfaces, cut to resemble the part’s multiple internal diameters. Using combination reamers reduces the number of separate operations as well as precisely creating relative depths and diameters.


Adjustable reamers consist of several blades along a tapered groove that can be adjusted to cover a small range of hole sizes. They are restricted to light usage due to the absence of any spiral in the flute, meaning they will only remove minimal material for each diameter setting, and cannot be used in holes that have an axial split.


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Description Price Shank Type Diameter Overall Length Material
RS庫存編號 394-279
BrandRS PRO
TWD2,808.00
單位
Straight 11.75 → 12.75mm 130 mm HSS
RS庫存編號 394-289
BrandRS PRO
TWD2,966.00
單位
Straight 12.75 → 13.75mm 145 mm HSS
RS庫存編號 394-291
BrandRS PRO
TWD3,529.00
單位
Straight 17 → 19mm 170 mm HSS
RS庫存編號 698-051
製造零件編號B101 3/4
BrandDormer
TWD2,420.00
單位
Morse Taper 3/4in 200 mm HSS
RS庫存編號 224-4454
製造零件編號B901 3.0MM
BrandDormer
TWD1,117.00
單位
Straight 3mm 62 mm HSS
RS庫存編號 698-180
製造零件編號B101 15MM
BrandDormer
TWD1,864.00
單位
Morse Taper 15mm 181 mm HSS
RS庫存編號 394-295
BrandRS PRO
TWD3,319.00
單位
Straight 15.25 → 17mm 165 mm HSS
RS庫存編號 698-124
製造零件編號B101 8MM
BrandDormer
TWD1,237.00
單位
Morse Taper 8mm 138 mm HSS
RS庫存編號 698-102
製造零件編號B101 6MM
BrandDormer
TWD1,190.00
單位
Morse Taper 6mm 125 mm HSS
RS庫存編號 188-2508
BrandRS PRO
TWD1,577.00
單位
Morse Taper 1/2in 5-15/16 in HSS
RS庫存編號 394-241
BrandRS PRO
TWD2,395.00
單位
Straight 8.5 → 9.25mm 105 mm HSS
RS庫存編號 188-2477
BrandRS PRO
TWD3,334.00
整套:1 個
Set(s)
Straight 14 mm, 18 mm, 22 mm 105 mm HSS
RS庫存編號 394-302
BrandRS PRO
TWD4,415.00
單位
Straight 19 → 21mm 180 mm HSS
RS庫存編號 394-251
BrandRS PRO
TWD2,613.00
單位
Straight 9.25 → 10mm 115 mm HSS
RS庫存編號 394-285
BrandRS PRO
TWD3,229.00
單位
Straight 13.75 → 15.25mm 150 mm HSS
RS庫存編號 698-023
製造零件編號B101 1/2
BrandDormer
TWD1,394.00
單位
Morse Taper 1/2in 156 mm HSS
RS庫存編號 224-4448
製造零件編號B901 2.0MM
BrandDormer
TWD1,442.00
單位
Straight 2mm 50 mm HSS
RS庫存編號 394-239
BrandRS PRO
TWD5,999.00
單位
Straight 21 → 23mm 85.72 mm HSS
RS庫存編號 394-245
BrandRS PRO
TWD2,283.00
單位
Straight 7.75 → 8.5mm 100 mm HSS
RS庫存編號 188-2505
BrandRS PRO
TWD2,414.00
單位
Morse Taper 22mm 184 mm HSS