M35 Cobalt Spiral Point Taps for Stainless Steel
M35 cobalt spiral point machine taps for metric through-hole threading in stainless steel and other demanding materials. Forward chip evacuation helps keep chips ahead of the cutting edges, while the M2–M20 size range supports common CNC and production tapping requirements.
Product Specifications
Tap TypeSpiral Point Machine Tap
Tool MaterialM35 Cobalt HSS
Thread RangeM2–M20
Pitch Range0.40–2.50 mm
Working Length10.5–37 mm
Overall Length43–111 mm
Cutting DirectionRight-Hand Cutting
Primary ApplicationThrough-Hole Tapping
10 Pieces per Size
1–3 Days for In-Stock Sizes
Dimensions / Thread Tolerance / Coating / OEM
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 Point Taps for Stainless Steel
These M35 cobalt high-speed steel spiral point machine taps are designed for metric through-hole threading in stainless steel, alloy steel and other demanding machinable materials. The spiral point geometry directs chips forward through the hole, helping keep chips away from the active cutting edges during continuous machine tapping. The listed range covers M2 × 0.4 through M20 × 2.5, with size-specific working lengths and overall lengths for tool selection. Right-hand cutting, cobalt-alloy HSS construction and through-hole chip control make this series suitable for production tapping where wear resistance, stable chip evacuation and repeatable thread generation are required.
Key Configuration
Spiral point cutting geometry drives chips forward ahead of the tap, supporting efficient chip evacuation when the workpiece hole is open at the bottom.
M35 cobalt high-speed steel provides the wear resistance and cutting-edge stability required for more demanding tapping conditions than general-purpose HSS.
Thirteen listed sizes cover metric coarse pitches from 0.40 to 2.50 mm, allowing selection by complete thread size, pitch and required working length.
Key Product Advantages
Forward Chip Evacuation
Spiral point geometry pushes chips ahead of the cutting zone, reducing chip accumulation in through-hole tapping.
Cobalt HSS Construction
M35 cobalt HSS supports wear resistance and cutting-edge stability when tapping stainless and higher-strength materials.
Right-Hand Cutting
The supplied configuration uses right-hand cutting for conventional metric internal-thread machining.
Broad Metric Size Range
The M2–M20 range covers common machine-tapping sizes for production, maintenance and general industrial threading.
Tapping Applications
This series is intended primarily for machine tapping of through holes where chips can be pushed forward beyond the cutting zone. Typical applications include stainless steel plates, brackets, housings, fabricated parts and general machined components produced on tapping machines, machining centers and CNC equipment.
Spiral point taps are intended for holes with an open exit for chips. Do not treat this geometry as a general blind-hole solution. Confirm the pilot-hole diameter, exit clearance, thread tolerance, workpiece hardness, machine synchronization and lubrication before production.
Workpiece Material Selection
| MATERIAL GROUP | EXAMPLES | APPLICATION LEVEL |
|---|---|---|
| M Stainless Steel | Austenitic, martensitic and other machinable stainless grades | Primary application — confirm grade and hardness |
| P Steel | Carbon, alloy and higher-strength steels | Suitable — confirm cutting conditions |
| S Tough Alloys | Selected heat-resistant and difficult-to-machine alloys | Application review required |
The product is positioned for stainless steel and other demanding materials, but material group alone does not determine tapping performance. Confirm the exact grade, hardness, hole depth, lubrication, machine rigidity and required thread tolerance before selecting production cutting data.
Selection & Setup Guidance
Select the tap by complete metric size and pitch, then verify through-hole clearance, working length and machine setup. For stainless steel, stable alignment, appropriate lubrication and synchronized feed are especially important for consistent thread quality and tool life.
For other machine-tapping configurations, browse our
HSS Tap Range.
For general HSS tool selection, see
How to Choose HSS Cutting Tools.
Size Chart & Specifications
The standard size range covers thirteen metric M35 cobalt spiral point taps from M2 × 0.4 to M20 × 2.5. Listed working lengths range from 10.5 to 37 mm and overall lengths from 43 to 111 mm. Select the complete thread size and pitch first, then confirm the required tapping depth, through-hole exit clearance, holder compatibility and workpiece material before production.
M2–M20 Metric Size Range
All dimensions below are in millimeters. Pitch values correspond to the listed metric thread sizes.
| Thread Size | Working Length | Pitch | Overall Length |
|---|---|---|---|
| M2 × 0.4 | 10.5 | 0.40 | 43.0 |
| M2.5 × 0.45 | 12.0 | 0.45 | 46.0 |
| M3 × 0.5 | 12.5 | 0.50 | 50.9 |
| M4 × 0.7 | 14.0 | 0.70 | 57.3 |
| M5 × 0.8 | 19.0 | 0.80 | 64.2 |
| M6 × 1.0 | 21.0 | 1.00 | 66.0 |
| M8 × 1.25 | 21.0 | 1.25 | 70.2 |
| M10 × 1.5 | 22.5 | 1.50 | 75.3 |
| M12 × 1.75 | 29.0 | 1.75 | 82.4 |
| M14 × 2.0 | 30.0 | 2.00 | 93.0 |
| M16 × 2.0 | 32.0 | 2.00 | 102.0 |
| M18 × 2.5 | 37.0 | 2.50 | 111.0 |
| M20 × 2.5 | 37.0 | 2.50 | 111.0 |
Specification confirmation: The existing product data states M35 cobalt high-speed steel, right-hand cutting and HRC60 hardness. The thread tolerance class, manufacturing standard, chamfer form and coating are not defined in the supplied data and should be confirmed when these are critical to the order.
How to Select the Correct Spiral Point Tap
M35 Spiral Point Tap Speeds & Feed Settings
Use the chart below only as a general HSS tapping reference. For M35 cobalt spiral point taps in stainless steel, confirm the exact stainless grade and hardness, thread size, hole depth, tool coating, lubrication and machine condition before selecting the 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 single-start metric threads, feed per revolution equals thread pitch. When programming in mm/min, F = n × P, where P is thread pitch in mm.
Calculation example: An M6 × 1.0 tap at 300 RPM requires 300 mm/min synchronized feed, or 1.0 mm/rev. This illustrates the feed calculation only and is not a stainless-steel cutting-speed recommendation.
For additional reference, see our HSS cutting tools speeds & feeds guide.
For other threading and machine-tapping configurations, browse our HSS Tap Range .
For general selection guidance, see How to Choose HSS Cutting Tools.
View HY Taps Catalog — for the broader tap range and additional configurations.
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, through-hole preparation, stainless steel tapping and ordering guidance for M2–M20 M35 cobalt spiral point machine taps.
Product & Application FAQs
Which sizes are available in this series?
The listed range covers thirteen metric coarse-thread sizes from M2 × 0.4 to M20 × 2.5. Working lengths range from 10.5 to 37 mm and overall lengths from 43 to 111 mm. Select the complete thread size and pitch rather than nominal diameter alone.
How does a spiral point tap control chips?
The spiral point cutting geometry directs chips forward ahead of the tap instead of pulling them back through the flutes. This helps keep chips away from the active cutting edges when tapping through holes with sufficient exit clearance.
Is this tap intended for through holes or blind holes?
This series is intended primarily for through-hole tapping because the spiral point geometry pushes chips forward beyond the cutting zone. Blind holes do not provide the same chip exit path and normally require a tap geometry selected specifically for upward chip evacuation, such as a suitable spiral flute tap.
Why use M35 cobalt HSS for stainless steel tapping?
M35 cobalt high-speed steel provides higher hot hardness and wear resistance than general-purpose HSS, making it useful for demanding tapping conditions. Stainless steel can generate heat and work harden during cutting, so tool material, lubrication, speed, alignment and pilot-hole preparation all need to be controlled together.
Which stainless steel grades can be tapped with this series?
The product is positioned for stainless steel, but tapping conditions differ significantly between austenitic, martensitic, ferritic and other stainless grades. Send the exact material designation and hardness for review rather than selecting cutting data from the material family alone.
How should I choose the pilot-hole diameter?
Select the pilot-hole diameter according to the thread size and pitch, required thread percentage, material condition and finished-thread tolerance. Stainless steel applications may require careful adjustment to avoid excessive tapping torque. Verify the drilled hole and inspect a trial thread before batch production.
What tapping conditions are important for stainless steel?
Use accurate alignment, synchronized feed and suitable tapping lubricant. Avoid excessive speed, rubbing and unnecessary dwell because stainless steel can work harden around the cutting zone. Feed per revolution should match the thread pitch during synchronized machine tapping.
What does the listed HRC60 hardness mean?
HRC60 is the tool-hardness value stated in the supplied product information. It should not be interpreted as the maximum workpiece hardness that can be tapped. Workpiece machinability depends on material grade, actual hardness, hole geometry, lubrication and cutting conditions.
Ordering & Customization FAQs
What information is needed for a quotation?
Provide the full thread size and pitch, quantity per size, stainless or alloy grade, workpiece hardness, hole type, workpiece thickness, required thread tolerance and machine setup. Include coating, marking, packaging or other special requirements when applicable.
Can non-standard dimensions and OEM branding be supplied?
Custom dimensions, thread specifications, tolerance requirements, coatings, laser marking and packaging can be reviewed according to the requested application and quantity. Critical dimensions and inspection requirements should be confirmed before production.
Are sample orders and mixed M2–M20 sizes available?
Sample and mixed-size requests can be reviewed. MOQ, stock availability and dispatch timing depend on the selected sizes, quantities and customization. Send the required size-and-quantity list for confirmation.
Selection Guides
Use the HSS guide for tool-material selection, compare tapping with thread milling where appropriate, and browse the HSS tap range for alternative blind-hole and through-hole tapping configurations.
Catalog & Technical Downloads
HY Taps Catalog (PDF)General tap series reference. Use this product page’s Specifications & Sizes section for the current M2–M20 spiral point tap dimensions; dimensions and configurations in other series may differ.
HSS Cutting Tools Speeds & Feeds Guide (PDF)General HSS tapping reference. Confirm tool-specific starting conditions for the stainless steel grade and tap size. During synchronized tapping, feed per revolution must match 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.
