Sutton 1/8 in #3/0 Taper Pin Reamer 1:48 - HSS
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The Sutton R105 is a taper pin reamer: a hand reamer for opening out parallel holes to suit 1:48 taper pins. It is used by hand with a suitable wrench, in HSS with a bright finish (uncoated and polished) and 7° left-hand flutes.
The range has 16 sizes, each identified by BS size from 3/32 in to 7/8 in and by taper pin series from #5/0 to #11. Choose the reamer by matching the size or series of the taper pin you are fitting. Smaller sizes have 4 flutes (3/32 in to 9/64 in) and the rest have 6. The taper is 1:48: the small-end diameter (d1), the large-end diameter (d3) and the flute length (l2) are given for every size, and the figures check out at 1 in 48 across the whole range (derived from the catalogue dimensions, within rounding).
Where this product is used
- Opening out a drilled parallel hole to suit a 1:48 taper pin.
- Toolroom and workshop assembly and repair work done by hand with a suitable wrench.
Choosing the right size
Match the BS size or series number on your taper pin to the first two columns. The d1 and d3 diameters show the size of the taper the reamer cuts, from the small end to the large end of the flutes.
| BS size | Series | d1 small end (mm) | d3 large end (mm) | d2 shank (mm) | l1 overall (mm) | l2 flute (mm) | Flutes (z) | Sutton item |
|---|---|---|---|---|---|---|---|---|
| 3/32 in | #5/0 | 1.75 | 2.41 | 3 | 57 | 32 | 4 | R105 0238 |
| 7/64 in | #4/0 | 2.23 | 2.89 | 3 | 57 | 32 | 4 | R105 0278 |
| 1/8 in | #3/0 | 2.56 | 3.29 | 3.5 | 62 | 35 | 4 | R105 0318 |
| 9/64 in | #2/0 | 2.89 | 3.68 | 4 | 70 | 38 | 4 | R105 0357 |
| 5/32 in | #0 | 3.22 | 4.1 | 4.5 | 70 | 42 | 6 | R105 0397 |
| 11/64 in | #1 | 3.7 | 4.64 | 5 | 75 | 45 | 6 | R105 0437 |
| 3/16 in | #2 | 4.11 | 5.19 | 5.5 | 82 | 52 | 6 | R105 0476 |
| 7/32 in | #3 | 4.64 | 5.85 | 6 | 90 | 58 | 6 | R105 0556 |
| 1/4 in | #4 | 5.28 | 6.63 | 6.5 | 105 | 65 | 6 | R105 0635 |
| 9/32 in | #5 | 6.09 | 7.72 | 6.5 | 115 | 78 | 6 | R105 0714 |
| 11/32 in | #6 | 7.08 | 9 | 7.5 | 130 | 92 | 6 | R105 0873 |
| 13/32 in | #7 | 8.4 | 10.8 | 9 | 155 | 115 | 6 | R105 1032 |
| 1/2 in | #8 | 10.11 | 12.92 | 11 | 175 | 135 | 6 | R105 1270 |
| 9/16 in | #9 | 12.24 | 15.47 | 14.5 | 205 | 155 | 6 | R105 1429 |
| 3/4 in | #10 | 14.75 | 18.5 | 16 | 230 | 180 | 6 | R105 1905 |
| 7/8 in | #11 | 17.93 | 22.31 | 19 | 285 | 210 | 6 | R105 2223 |
Getting a clean taper hole
- Lubricate generously. A lack of lubricant causes tool wear and a poor finish, and the fix is to increase the supply. Straight cutting oil is the usual choice in reaming, because the aim is finish rather than cooling.
- Start with a good hole. A badly drilled hole is listed against all four problems (breakage, wear, chatter and poor finish) and the fix is to replace the drill.
- Keep it aligned and rigid. Misalignment causes breakage and wear (fix: align the holes) and lack of rigidity causes breakage and chatter (fix: improve rigidity).
- Don't force it. Entering the work too fast is listed against breakage and chatter, and the fix is a slower approach feed.
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | R105 |
| Type | Taper pin reamer, hand use |
| Taper | 1:48 (taper pins) |
| Material | High Speed Steel (HSS) |
| Finish | Bright (uncoated, polished) |
| Flute geometry | 7° left helix (L7) |
| Sizes in this range | 16 sizes, BS 3/32 in to 7/8 in (series #5/0 to #11) |
| Flutes (z) | 4 on the smallest four sizes, 6 on the rest |
| Designation | N |
Related reaming tools
Our reamer collection covers the full reamer family, including the R100 hand reamers for parallel holes to size and the R109 adjustable hand reamer for a size range from one tool.
Having reaming problems? Our Cutting Tool Troubleshooting Guide covers reamers alongside drills and taps.
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Sutton Tools R105 Taper Pin Reamer - High Speed Steel HSS: 1/8
SKU: A0012299 | Model: R1050318
Reamer Size (inch) 1/8. Descriptions
Sutton R105 hand-operated taper pin reamer in HSS for opening out parallel holes to suit 1:48 taper pins.
16 sizes, BS 3/32 in to 7/8 in (series #5/0 to #11), with 7° left-hand flutes.