#95 drill size
A #95 number (wire-gauge) drill is 0.0067 in (0.170 mm).
- Decimal inch
- 0.0067
- Millimeters
- 0.170
- Nearest 1/64
- 1/64" (-0.0089)
- Type
- number (wire-gauge) drill
Nearest equivalents in other systems
| System | Drill | Inch | mm | Difference |
|---|---|---|---|---|
| Fractional | 1/64" | 0.0156 | 0.397 | +0.0089 in |
| Metric | 0.15 mm | 0.0059 | 0.150 | -0.0008 in |
Speeds and feeds: in mild steel an HSS drill starts at about 51,310 RPM and 0.0007 in/rev (35.9 IPM); in 6061 aluminum about 142,530 RPM.
#95 drill speeds and feeds by material
Jobber-length twist drill, D = 0.0067 in. RPM = 3.82 × SFM ÷ D, rounded to 10. Feed per rev scales with diameter and material; IPM = RPM × IPR.
| Material | HSS SFM | HSS RPM | Carbide SFM | Carbide RPM | Feed (in/rev) | HSS IPM | Carbide IPM |
|---|---|---|---|---|---|---|---|
| Aluminum (6061) | 250 | 142,530 | 600 | 342,060 | 0.0007 | 99.8 | 239.4 |
| Brass / free-machining | 150 | 85,520 | 400 | 228,040 | 0.0006 | 51.3 | 136.8 |
| Low-carbon steel (1018) | 90 | 51,310 | 300 | 171,030 | 0.0007 | 35.9 | 119.7 |
| Alloy steel (4140, annealed) | 70 | 39,910 | 250 | 142,530 | 0.0007 | 27.9 | 99.8 |
| Stainless 304 | 40 | 22,800 | 150 | 85,520 | 0.0005 | 11.4 | 42.8 |
| Gray cast iron | 80 | 45,610 | 250 | 142,530 | 0.0005 | 22.8 | 71.3 |
| Titanium 6Al-4V | 25 | 14,250 | 100 | 57,010 | 0.0004 | 5.70 | 22.8 |
| Plastics (acetal) | 300 | 171,030 | 500 | 285,050 | 0.0013 | 222.3 | 370.6 |
Small drills: the computed RPM is above most spindles. Run at your spindle's maximum and keep the feed per rev; feed drops in proportion.
Metric: Vc (m/min) = SFM × 0.3048; feed (mm/rev) = in/rev × 25.4. In steel, 51,310 RPM × 0.018 mm/rev = 912 mm/min.
Worked example: #95 drill in 1018 steel
- HSS drill in low-carbon steel: 90 SFM.
- RPM = 3.82 × 90 ÷ 0.0067 ≈ 51,310 RPM.
- Feed for a 0.007 in drill in mild steel ≈ 0.0007 in/rev.
- IPM = 51,310 × 0.0007 = 35.9 IPM.
Peck cycle by hole depth
| Depth | Cycle | Peck | Note |
|---|---|---|---|
| 3×D = 0.020 in (0.5 mm) | G81 (no peck) | None | Up to 3×D a sharp drill clears chips on its own. |
| 5×D = 0.034 in (0.9 mm) | G73 chip-break | 1 × D | Chip-break pecks; full retract if chips pack (soft aluminum, stainless). |
| 8×D = 0.054 in (1.4 mm) | G83 full retract | 0.5-1 × D, shrinking with depth | Retract to clear chips; reduce feed ~10-20% past 5×D. |
Taps that use a #95 drill
No standard UNC, UNF or metric tap in our tables calls for a #95 drill. Use it for clearance, pilot or reamer prep holes.
Nearest drills
- #96: 0.0063 in / 0.160 mm (-0.0004 in)
- #94: 0.0071 in / 0.180 mm (+0.0004 in)
- 0.15 mm: 0.0059 in / 0.150 mm (-0.0008 in)
- #97: 0.0059 in / 0.150 mm (-0.0008 in)
Common questions
- What is a #95 drill in decimal and mm?
- 0.0067 in, or 0.170 mm; nearest fractional drill: 1/64" (0.0156 in, +0.0089 in); nearest metric drill: 0.15 mm (0.0059 in, -0.0008 in).
- What RPM for a #95 drill in steel?
- In low-carbon steel (1018) an HSS #95 drill (0.0067 in) runs about 51,310 RPM at 90 SFM; a carbide drill about 171,030 RPM at 300 SFM. RPM = 3.82 × SFM ÷ D.
- What feed for a #95 drill?
- About 0.0007 in/rev in mild steel, 0.0007 in/rev in aluminum and 0.0005 in/rev in 304 stainless. At 51,310 RPM that is 35.9 IPM in steel (IPM = RPM × IPR).
- What RPM for a #95 drill in aluminum?
- 142,530 RPM with HSS (250 SFM) or up to 342,060 RPM with carbide (600 SFM), feeding about 0.0007 in/rev.
- What size is a #95 drill?
- 0.0067 in / 0.170 mm. The nearest other drills are #96 (0.0063 in), #94 (0.0071 in), 0.15 mm (0.0059 in).
Nearby drill sizes
Sources
- Machinery's Handbook, 31st ed., Speeds and Feeds for Drilling, Reaming and Threading (Tables 17-23) — HSS and carbide drilling SFM (rounded).
- RedLine Tools (Productivity Inc.) catalog p. 340, Cobalt & HSS Drills Speeds & Feeds — feed per rev by drill diameter and material (middle of the catalog range).
- ASME B94.11M twist drills: number (#1-#80) and letter (A-Z) drill sizes; drill size reference.
Material feed multipliers (aluminum 1.3×, brass 1.1×, 4140 0.85×, stainless and titanium 0.7× the mild-steel feed) are JobLine estimates. Peck guidance is JobLine shop practice. Use your drill maker's data first.
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