Extra Long HSS Morse Taper Shank Drills
Extra-long HSS Morse taper shank drills for applications requiring extended tool reach. The size chart lists 97 diameters from Ø6.00 to Ø30.00 mm, with diameter-specific flute lengths, overall lengths and MT1–MT3 taper sizes.
Product Specifications
Consistent Quality
Consistent geometry across repeat orders.
유연한 주문
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
표준 및 맞춤형
Standard sizes and custom configurations.
Extra Long HSS Morse Taper Shank Drills Overview
These extra-long HSS Morse taper shank drills provide extended flute and overall lengths for applications that need greater tool reach. The supplied chart lists 97 exact diameters from Ø6.00 to Ø30.00 mm, with flute lengths L1 of 145–275 mm and overall lengths L of 225–395 mm. MT1, MT2 and MT3 taper assignments vary by diameter; match the selected drill to the machine socket and check clearance, chip evacuation and coolant access. Confirm the HSS grade, point geometry and other cutting details for the ordered model.
Key Configuration
The chart assigns MT1 to Ø6.00–14.00 mm, MT2 to Ø14.25–23.00 mm and MT3 to Ø23.25–30.00 mm. Check the spindle or sleeve socket.
Each listed diameter has its own flute length L1 and overall length L. Check both dimensions for the machine and part setup.
Confirm the HSS grade, point angle, surface finish and tolerance for the exact drill; the dimension chart does not state them.
Key Product Advantages
Extended Flutes
Listed flute lengths reach 275 mm on selected diameters.
Taper Shank Fit
MT1, MT2 and MT3 assignments make socket matching clear.
Exact Size List
The chart provides 97 diameter-specific dimension entries.
Overall Length Reference
Overall lengths reach 395 mm for the largest listed sizes.
Drilling Applications
Use this series where the setup calls for a longer HSS drill with a Morse taper shank. Select the exact diameter, check machine travel and fixture clearance, and plan coolant delivery and chip removal over the required reach. The flute length alone does not define a safe drilling depth.
Workpiece Material Selection
The supplied dimension chart does not specify workpiece groups, material hardness limits or cutting data. Provide the workpiece grade and hole requirements to confirm the appropriate HSS grade, drill geometry and starting conditions.
Product Details & Available Configurations
The Specifications & Sizes tab lists diameter D, flute length L1, overall length L and the associated MT1, MT2 or MT3 taper for every chart entry. The source chart is labeled GB/T 1438.3; confirm the complete drawing, steel grade, cutting point, tolerance and availability for the ordered model.
Size Chart & Specifications
The supplied chart lists 97 drill diameters from Ø6.00 to Ø30.00 mm, with flute lengths (L1) of 145–275 mm and overall lengths (L) of 225–395 mm. Morse taper sizes vary by diameter. All dimensions are in millimeters. Select the required diameter, then confirm its overall length, flute length and machine socket compatibility.
| Diameter D (mm) | Overall L (mm) | Flute L1 (mm) | Morse Taper | Diameter D (mm) | Overall L (mm) | Flute L1 (mm) | Morse Taper |
|---|---|---|---|---|---|---|---|
| 6.00 | 225 | 145 | MT1 | 18.25 | 310 | 210 | MT2 |
| 6.20 | 230 | 150 | MT1 | 18.50 | 310 | 210 | MT2 |
| 6.50 | 230 | 150 | MT1 | 18.75 | 310 | 210 | MT2 |
| 6.80 | 235 | 155 | MT1 | 19.00 | 310 | 210 | MT2 |
| 7.00 | 235 | 155 | MT1 | 19.25 | 320 | 220 | MT2 |
| 7.20 | 235 | 155 | MT1 | 19.50 | 320 | 220 | MT2 |
| 7.50 | 235 | 155 | MT1 | 19.75 | 320 | 220 | MT2 |
| 7.80 | 240 | 160 | MT1 | 20.00 | 320 | 220 | MT2 |
| 8.00 | 240 | 160 | MT1 | 20.25 | 330 | 230 | MT2 |
| 8.20 | 240 | 160 | MT1 | 20.50 | 330 | 230 | MT2 |
| 8.50 | 240 | 160 | MT1 | 20.75 | 330 | 230 | MT2 |
| 8.80 | 245 | 165 | MT1 | 21.00 | 330 | 230 | MT2 |
| 9.00 | 245 | 165 | MT1 | 21.25 | 335 | 235 | MT2 |
| 9.20 | 245 | 165 | MT1 | 21.50 | 335 | 235 | MT2 |
| 9.50 | 245 | 165 | MT1 | 21.75 | 335 | 235 | MT2 |
| 9.80 | 250 | 170 | MT1 | 22.00 | 335 | 235 | MT2 |
| 10.00 | 250 | 170 | MT1 | 22.25 | 335 | 235 | MT2 |
| 10.20 | 250 | 170 | MT1 | 22.50 | 340 | 240 | MT2 |
| 10.50 | 250 | 170 | MT1 | 22.75 | 340 | 240 | MT2 |
| 10.80 | 255 | 175 | MT1 | 23.00 | 340 | 240 | MT2 |
| 11.00 | 255 | 175 | MT1 | 23.25 | 360 | 240 | MT3 |
| 11.20 | 255 | 175 | MT1 | 23.50 | 360 | 240 | MT3 |
| 11.50 | 255 | 175 | MT1 | 23.75 | 365 | 245 | MT3 |
| 11.80 | 255 | 175 | MT1 | 24.00 | 365 | 245 | MT3 |
| 12.00 | 260 | 180 | MT1 | 24.25 | 365 | 245 | MT3 |
| 12.20 | 260 | 180 | MT1 | 24.50 | 365 | 245 | MT3 |
| 12.50 | 260 | 180 | MT1 | 24.75 | 365 | 245 | MT3 |
| 12.80 | 260 | 180 | MT1 | 25.00 | 365 | 245 | MT3 |
| 13.00 | 260 | 180 | MT1 | 25.25 | 375 | 255 | MT3 |
| 13.20 | 260 | 180 | MT1 | 25.50 | 375 | 255 | MT3 |
| 13.50 | 265 | 185 | MT1 | 25.75 | 375 | 255 | MT3 |
| 13.80 | 265 | 185 | MT1 | 26.00 | 375 | 255 | MT3 |
| 14.00 | 265 | 185 | MT1 | 26.25 | 375 | 255 | MT3 |
| 14.25 | 290 | 190 | MT2 | 26.50 | 375 | 255 | MT3 |
| 14.50 | 290 | 190 | MT2 | 26.75 | 385 | 265 | MT3 |
| 14.75 | 290 | 190 | MT2 | 27.00 | 385 | 265 | MT3 |
| 15.00 | 290 | 190 | MT2 | 27.25 | 385 | 265 | MT3 |
| 15.25 | 295 | 195 | MT2 | 27.50 | 385 | 265 | MT3 |
| 15.50 | 295 | 195 | MT2 | 27.75 | 385 | 265 | MT3 |
| 15.75 | 295 | 195 | MT2 | 28.00 | 385 | 265 | MT3 |
| 16.00 | 295 | 195 | MT2 | 28.25 | 395 | 275 | MT3 |
| 16.25 | 300 | 200 | MT2 | 28.50 | 395 | 275 | MT3 |
| 16.50 | 300 | 200 | MT2 | 28.75 | 395 | 275 | MT3 |
| 16.75 | 300 | 200 | MT2 | 29.00 | 395 | 275 | MT3 |
| 17.00 | 300 | 200 | MT2 | 29.25 | 395 | 275 | MT3 |
| 17.25 | 305 | 205 | MT2 | 29.50 | 395 | 275 | MT3 |
| 17.50 | 305 | 205 | MT2 | 29.75 | 395 | 275 | MT3 |
| 17.75 | 305 | 205 | MT2 | 30.00 | 395 | 275 | MT3 |
| 18.00 | 305 | 205 | MT2 |
Specification confirmation: The chart specifies diameter, flute length, overall length and Morse taper size. It does not identify the exact HSS grade, point angle, coating, diameter tolerance or coolant configuration. Confirm these details for the ordered model.
HSS Drill Speeds & Feed Settings
Select starting cutting data according to the confirmed HSS grade, drill geometry, workpiece grade and hardness, hole depth and coolant supply. The dimension chart does not provide cutting speed or feed recommendations.
Setting Speed & Feed
Spindle speed: n = (1000 × Vc) / (π × D), where n is RPM, Vc is cutting speed in m/min and D is drill diameter in mm.
Feed rate: F = n × f, where F is feed in mm/min and f is feed per revolution in mm/rev.
Calculation example: At 300 RPM and 0.15 mm/rev, the programmed feed is 45 mm/min. This illustrates the formula only; the values are not a material-specific recommendation.
For additional reference, see our HSS cutting tools speeds & feeds guide. Confirm tool-specific values for the selected drill and workpiece.
HSS Drill Customization & OEM
HSS drills can be reviewed against your hole requirements, workpiece material and machine setup. We can discuss application-specific dimensions, cutting geometry, tool material, surface finish and private-label presentation. Available options depend on the drill type and the confirmed manufacturing specification.
Point & Cutting Geometry
Review point angle, point thinning, flute design and cutting-edge geometry according to the workpiece and drilling operation. Geometry options vary between twist drills, center drills and special drills.
Dimensions & Shank
Specify cutting diameter, flute length, overall length and the required shank configuration. Straight-shank, Morse-taper, extra-long and other constructions are reviewed by product series.
Finish & OEM Branding
Review a suitable coating or surface finish where applicable. Laser marking, labels and packaging can be discussed for distributor and private-label orders.
사용자 지정 옵션
| 매개변수 | Information to Confirm |
|---|---|
| Drill Type | Twist drill, center drill, extra-long drill or application-specific design |
| 도구 재질 | Required HSS grade, such as M2, M35 or M42, subject to the selected series |
| Diameter | Cutting diameter and required diameter tolerance |
| Length & Reach | Flute length, overall length, drilling depth and clearance requirements |
| Point & Flutes | Point geometry, flute design and chip-evacuation requirements |
| Shank | Shank type and dimensions required by the holder |
| 표면 마감 | Uncoated, coated or treated finish, where suitable for the tool and application |
| OEM Presentation | Tool marking, product labels and packaging requirements |
Options are reviewed for the specific product and order. A listed option does not imply that every HSS drill series has the same material, geometry, shank or coating choices.
What to Send for a Custom Drill Quote
Send the drill type, diameter, hole depth, workpiece grade, required geometry, shank or holder details, quantity and any coating or marking requirements. A drawing or reference sample helps confirm non-standard dimensions.
Submit a Custom Tool RequestHSS Drill Quality Control
HSS drills are reviewed against the confirmed product specification or approved drawing. Checks are selected according to drill type, size, geometry and finish, from incoming material through grinding, final inspection and packing.
Material Verification
Check the specified HSS grade and incoming material information against the production order.
In-Process Checks
Review key dimensions and ground features during production so deviations can be addressed before final inspection.
Final Tool Inspection
Check the applicable diameter, lengths, point geometry, cutting edges and shank against the approved specification.
Marking & Packing
Verify the model identification, order quantity and agreed packaging before dispatch.
Inspection Checkpoints
| 기능 | Check Against the Confirmed Specification |
|---|---|
| 절단 직경 | Nominal size and specified diameter tolerance |
| Flute & Overall Length | Required cutting length, tool reach and overall dimension |
| Point Geometry | Point angle, symmetry and specified point features |
| Cutting Edges & Flutes | Visible edge condition and the relevant ground flute features |
| Shank & Finish | Specified shank dimensions and applicable coating or surface finish |
| Order Identification | Model, size, quantity, marking and agreed packaging |
Learn more about our manufacturing and quality process.
Product FAQs
What sizes are listed for these extra-long Morse taper drills?
The size chart lists 97 drill diameters from Ø6.00 to Ø30.00 mm. Depending on diameter, overall lengths range from 225 to 395 mm and flute lengths range from 145 to 275 mm. Check the exact dimensions and taper size for each diameter in the Specifications table.
Which Morse taper size should I select?
The chart assigns MT1 to Ø6.00–14.00 mm, MT2 to Ø14.25–23.00 mm and MT3 to Ø23.25–30.00 mm. Match the taper listed for your exact drill diameter to the machine spindle or compatible holder before ordering.
Does the flute length indicate the maximum drilling depth?
No. Flute length (L1) is a physical tool dimension, not a guaranteed usable hole depth. The achievable depth also depends on the drill point, chip evacuation, coolant access, workpiece setup and required clearance. Provide the target hole depth when selecting the drill.
What is the advantage of a Morse taper shank?
A Morse taper shank fits a matching machine spindle or holder without a straight-shank drill chuck. Confirm the taper number, machine socket, installation method and available travel for the selected drill size.
Which HSS grade, point angle and coating are supplied?
The supplied dimension chart identifies the sizes and lengths but does not specify the exact HSS grade, point angle or coating. Confirm these details for the selected model in the quotation or approved product drawing.
How should I select speeds and feeds for an extra-long drill?
Choose starting values according to the confirmed drill grade and geometry, workpiece material, diameter, hole depth and coolant supply. Check tool runout and rigidity, provide effective chip evacuation and validate the settings with a trial hole. The dimension chart does not specify cutting parameters.
Ordering & OEM FAQs
What information is needed for a quotation?
Send the drill diameter, quantity per size, workpiece material, required hole depth and machine taper socket. Include any required HSS grade, point geometry, coating, dimensional tolerance or drawing.
Can the dimensions or OEM marking be customized?
Custom diameter, flute length, overall length, point geometry and marking requests can be reviewed against your drawing and application. Feasibility, tolerance, minimum quantity and lead time are confirmed for the requested configuration.
Can I request a mixed-size order?
Yes. Send a diameter-by-diameter quantity list for review. Availability, minimum quantity and dispatch timing will be confirmed for the selected sizes and specifications.
Downloads & Technical Reference
For general starting calculations, see the HSS cutting tools speeds & feeds guide. Confirm cutting data for the ordered drill and workpiece before production.
Need Sizes, Pricing or Custom Options?
Send us the required tool type, sizes, quantities, workpiece material and any OEM or custom requirements. We will confirm suitable specifications, availability, lead time and quotation details.
Drawings, size lists and reference photos are welcome.
