M35 Cobalt Spiral Flute Taps for Stainless Steel Blind Holes
M35 cobalt spiral flute machine taps for cutting metric threads in stainless-steel blind holes. The size chart lists 13 sizes from M2 × 0.4 to M20 × 2.5, with size-specific working-depth and overall-length dimensions.
Product Specifications
*Working Depth is the chart label; confirm achievable full-thread depth and bottom clearance for the application.
Consistent Quality
Consistent geometry across repeat orders.
Flexible Orders
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
Standard & Custom
Standard sizes and custom configurations.
M35 Cobalt Spiral Flute Taps for Stainless Steel Blind Holes
These M35 cobalt spiral flute machine taps are intended for metric threading in stainless steel blind holes. The helical flutes help move chips back toward the hole entry during tapping. The supplied chart lists thirteen sizes from M2 × 0.4 to M20 × 2.5, with overall lengths from 43 to 111 mm and chart-listed working depths from 10.5 to 37 mm. Select the complete diameter and pitch, then check the workpiece grade, required full-thread depth, bottom clearance and holder fit. Confirm the exact tap grade, coating, chamfer and cutting conditions for the selected size before production.
Key Configuration
Helical flutes help evacuate chips toward the entry of a blind hole. Confirm flute geometry and chamfer for the workpiece.
The chart covers M2–M20 with pitches from 0.4 to 2.5 mm. Specify both diameter and pitch when ordering.
Overall lengths range from 43 to 111 mm; chart-listed working depths range from 10.5 to 37 mm.
Key Product Advantages
M2–M20 Metric Range
Thirteen listed diameter and pitch combinations support size-specific selection.
M35 Cobalt HSS
M35 cobalt high-speed steel is the stated product material; confirm the grade with the order.
Blind-Hole Chip Flow
Spiral flutes help carry chips back out of the hole during machine tapping.
Dimensional Reference
The chart lists pitch, overall length and working depth for each nominal diameter.
Tapping Applications
This series is positioned for machine tapping of metric blind holes in stainless steel components. Check the specific stainless grade and hardness, available bottom clearance, chip formation and lubrication before setting the tapping cycle.
Workpiece Material Selection
The product is positioned for stainless steel blind-hole tapping. The supplied dimension chart does not define approved stainless grades, hardness limits or cutting data, so evaluate the material and tap configuration for each application.
| MATERIAL GROUP | EXAMPLES | APPLICATION LEVEL |
|---|---|---|
| M Stainless Steel | Austenitic and other stainless grades | Primary group; confirm grade and hardness |
| P Steel | Carbon and alloy steels | Application review required |
Product Details & Available Configurations
Machining Process Video
Machining demonstration of the M35 cobalt spiral flute tap. Confirm the workpiece material and cutting conditions for your application.
For stainless steel through holes, see our HSS tap range and select an appropriate spiral point series.
Size Chart & Specifications
The supplied chart lists thirteen M35 cobalt spiral flute tap sizes from M2 × 0.4 to M20 × 2.5. Overall lengths range from 43 to 111 mm, while the column labeled “Working Depth” ranges from 10.5 to 37 mm. Specify the complete diameter and pitch, then verify the required full-thread depth, bottom clearance and holder fit for the blind-hole application.
Specification confirmation: M35 cobalt HSS is the stated product material. The dimension image does not specify shank diameters, coating, thread tolerance, helix angle or chamfer length. Confirm these details before ordering. The two illustrated end shapes alone do not establish bottoming capability.
HSS Tap Speeds & Feed Settings
Use the chart below only as a general M2–M12 HSS tapping reference. This product extends to M20, and the chart does not provide M35-specific settings or values for M14–M20. Confirm the stainless steel grade and hardness, tap coating, thread depth and lubrication before selecting a starting spindle speed.
Setting Speed & Feed
Spindle speed: n = (1000 × Vc) / (π × D), where n is RPM, Vc is cutting speed in m/min and D is nominal tap diameter in mm.
Tapping feed: For the listed single-start metric threads, feed per revolution equals thread pitch. When programming in mm/min, F = n × P, where P is pitch in mm.
Calculation example: An M6 × 1.0 tap at 400 RPM requires 400 mm/min synchronized feed, or 1.0 mm/rev. This illustrates the calculation only; it is not a stainless steel cutting-speed recommendation.
For additional reference, see our HSS cutting tools speeds & feeds guide.
For stainless steel through-hole tapping, browse our HSS tap range and choose a suitable spiral point series.
View HY Taps Catalog — for the broader range. Use this page’s chart for the listed M2–M20 dimensions; other catalog series may differ.
HSS Tap Customization
For requirements beyond the standard range, send your tap drawing or application details. Custom HSS cutting and forming taps can be reviewed for the following specifications.
| PARAMETER | CUSTOMIZATION OPTIONS |
|---|---|
| Thread Specification | Metric, UNC/UNF and pipe threads; special diameters, pitches and left-hand threads. |
| Thread Accuracy | Tap limits and oversize allowances to suit the required internal-thread tolerance and gauging requirements. |
| Tap Geometry | Straight flute, spiral flute, spiral point or forming design; chamfer and working geometry matched to the application. |
| Length & Reach | Overall length, threaded-section length and neck clearance to suit thread depth and component access. |
| Shank & Drive Square | Shank diameter, square dimensions and holding length to match the tapping holder. |
| Material & Surface Finish | HSS or cobalt HSS grades; uncoated, TiN or TiCN options, depending on the tap design and workpiece material. |
Options depend on tap type and size. Final specifications, minimum order quantity and lead time are confirmed with the quotation.
OEM & Private Label
Customer branding and packaging can be specified for distributor and tooling-brand orders.
Laser marking: Logo, thread size, product code and batch identification, subject to available shank space. Labels & packaging: Protective tubes, product labels and branded packaging to the approved artwork.
For a quotation: Send a drawing or thread specification, required tolerance, workpiece material and hardness, blind or through-hole details, thread depth and quantity. Include machine, holder and lubrication details for application-specific requests.
HSS Tap Quality & Inspection
HSS cutting and forming taps are checked against the confirmed product specification or approved drawing. Material verification, in-process dimensional checks and final inspection focus on thread accuracy, tool geometry and consistent identification before packing.
Key Inspection Points
Inspection items and acceptance criteria depend on the tap type, size and agreed requirements.
| INSPECTION ITEM | CHECK POINTS |
|---|---|
| Material & Hardness | HSS or cobalt HSS grade and material records; hardness requirements and verification agreed for the selected grade. |
| Thread Form & Accuracy | Thread size, pitch, profile and specified tap limits against the confirmed specification or drawing. |
| Working Geometry | Flutes, spiral point and cutting edges for cutting taps; forming lobes and lubrication grooves, where present, for forming taps. Chamfer geometry checked for each design. |
| Tool Dimensions | Threaded-section length, overall length, shank diameter and drive-square dimensions. |
| Runout & Surface Condition | Specified runout, burrs, chipped edges and visible defects on cutting or forming surfaces. |
| Coating & Identification | Specified surface finish or coating, visible condition, tool marking and label accuracy. |
Inspection documentation: Specify any required material records, dimensional reports or sample-thread validation before ordering. Availability and inspection scope are confirmed with the quotation.
Packaging & Batch Identification
Individual protective packaging helps prevent damage to tap threads and working surfaces. Labels identify the tool specification and order or batch reference. Models, quantities and packing details are checked before dispatch.
Export Packing & Delivery
Outer cartons, cushioning and export packing are selected for the order quantity and shipping method. Dispatch dates, freight and payment terms are confirmed with the order.
FAQ & Technical Support
Selection, blind-hole preparation and ordering guidance for M2–M20 M35 cobalt spiral flute taps.
Product & Application FAQs
Which thread sizes are listed for this series?
The chart lists 13 metric sizes: M2 × 0.4, M2.5 × 0.45, M3 × 0.5, M4 × 0.7, M5 × 0.8, M6 × 1.0, M8 × 1.25, M10 × 1.5, M12 × 1.75, M14 × 2.0, M16 × 2.0, M18 × 2.5 and M20 × 2.5. Overall lengths range from 43 to 111 mm.
Why choose a spiral flute tap for a blind hole?
The helical flutes help carry chips back toward the hole entrance during cutting. This chip-flow direction is useful in blind-hole tapping, where chips cannot exit through the bottom. Confirm the required thread depth, bottom clearance and cutting conditions for the specific workpiece.
Are these taps intended for stainless steel?
Stainless-steel blind-hole tapping is the stated application for this M35 cobalt series. Select cutting conditions according to the stainless-steel grade, hardness, hole depth and available lubrication. Send these details when requesting an application recommendation.
Does “Working Depth” equal the finished full-thread depth?
The chart labels this dimension “Working Depth” and lists values from 10.5 to 37 mm. It does not define whether the value includes the cutting lead or equals the achievable full-thread depth. Confirm the required full-thread depth, chamfer length and clearance at the bottom of the hole before ordering.
What pilot-hole diameter should I use?
The supplied size chart does not list pilot-hole diameters. Specify the complete thread size and pitch, workpiece grade and required finished-thread tolerance, then confirm the drill size for that application. Check the drilled hole and a trial thread before production.
Does the chart specify shank diameter or thread tolerance?
No. The supplied chart lists diameter, pitch, working depth and overall length. Confirm shank dimensions, square dimensions and tap tolerance against your holder and finished-thread requirements when placing an order.
How should speed and feed be set?
For a single-start metric thread, synchronized feed per revolution equals the thread pitch. Select spindle speed using the actual stainless-steel grade, tap size, coating if applicable, hole depth and lubrication. Validate the starting conditions with a trial cut; the dimension chart does not provide cutting-speed recommendations.
Ordering & Customization FAQs
What information is needed for a quotation?
Provide the thread size and pitch, quantity per size, stainless-steel grade, hole depth, required full-thread depth and finished-thread tolerance. Include holder dimensions, any coating requirements and a part drawing where available.
Can dimensions, coating and OEM branding be customized?
Requests for custom dimensions, thread tolerance, coating, marking and packaging can be reviewed against your drawing and order quantity. Confirm the final specification and availability before production.
Are sample orders and mixed sizes available?
Sample and mixed-size requests can be reviewed. MOQ, stock availability and dispatch timing depend on the selected sizes and any customization. Send a size-and-quantity list for confirmation.
Selection Guides
How to Choose HSS Cutting Tools
Thread Milling vs Tapping: Tool Selection
How to Choose a Thread Mill: Thread, Pitch & Tool Guide
The thread milling guides help compare alternative threading methods; use the tap size chart on this page for this product series.
Catalog & Technical Downloads
General tap series reference. Use this product page’s size chart for the M2–M20 dimensions; other catalog series may differ.
HSS Cutting Tools Speeds & Feeds Guide (PDF)
General HSS reference. Confirm tap-specific cutting conditions for M35 cobalt and the actual stainless-steel grade. Tapping feed per revolution follows the thread pitch.
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.
