TC thread turning inserts offer a rich range of profile standards and cover a wide variety of threading requirements. They suit general machinery, automotive, valve and pipe joint applications. Four insert sizes - 08, 11, 16 and 22 - with PVD-coated grades for steel, stainless steel and cast iron.
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Item |
Detail |
|
Product series |
TC series un-ground (moulded) thread turning inserts |
|
Insert sizes |
08 / 11 / 16 / 22 |
|
Thread profiles |
Partial 60° and 55°; ISO metric; UN; Whitworth (W); NPT; BSPT; DIN 405 round (RD) |
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Coating |
PVD |
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Grades |
GM3325, GM3225, GM3220 |
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Workpiece materials |
Steel, stainless steel, cast iron |
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Infeed |
Radial, flank |
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Typical industries |
General machinery, automotive, valve, pipe joint |
Product Features
Triangular protrusion
A triangular protrusion effectively controls chip flow, coping with both radial infeed and flank infeed machining methods.
Arc surface
The arc surface increases the heat dissipation area, avoids crater wear and effectively improves tool life.
Large-capacity chip groove
Large-capacity chip groove design avoids chip accumulation during internal thread machining.
Sizes 08 / 11 / 16 / 22
Four insert sizes covering different pitch ranges and holder specifications.
Substrate and Grades
Three coated carbide grades cover the machining requirements of materials including steel, stainless steel and cast iron. The coating technology is PVD.
|
Grade |
Coating |
Coverage |
|
GM3325 |
PVD |
Steel / stainless steel / cast iron (covered across the three grades) |
|
GM3225 |
PVD |
Steel / stainless steel / cast iron (covered across the three grades) |
|
GM3220 |
PVD |
Steel / stainless steel / cast iron (covered across the three grades) |
Ordering note: The source page lists the three grade names and their overall material coverage, but gives no breakdown of which grade suits which material or cutting speed. Obtain the per-grade material and parameter data before selecting, rather than relying on the summary line alone.
Thread Profile Coverage
Un-ground thread turning inserts offer a rich range of profile standards, covering a wide variety of threading requirements and suiting general machinery, automotive, valve and pipe joint industries. The table below groups profiles and their codes by application.
|
Application area |
Thread type |
Thread code |
|
General industry |
Partial profile 60° thread |
60° |
|
General industry |
Partial profile 55° thread |
55° |
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General industry |
ISO metric thread |
ISO |
|
General industry |
American UN thread |
UN |
|
Pipe fittings and couplings for steam, gas and sewage |
Whitworth thread |
W |
|
Pipe fittings and couplings for steam, gas and sewage |
NPT thread |
NPT |
|
Pipe fittings and couplings for steam, gas and sewage |
BSPT thread |
BSPT |
|
Pipe coupling in food and fire fighting |
Round DIN 405 thread |
RD |
Related range: high-precision ground series. The same product line also includes a high-precision ground series. Per the manufacturer's own description, the differences are: rich profile standards, high-precision thread profile dimensions, stable edge treatment, dimensional accuracy down to ±0.025 mm, and a wiper design for improved surface quality, covering common standards such as ISO, UN, NPT and BSPT.
By contrast, the un-ground TC series is positioned around broad profile standard coverage, wide applicability and practical chip-control design (triangular protrusion and large-capacity chip groove). The choice depends on the tolerance risk of the workpiece, not on price alone.
Application Case - BSPT-TC (Union Joint)
Cutting data as published by the manufacturer, on a 316 stainless steel union joint, external thread machining.
|
Item |
Value |
|
Specification |
16ER11BSPT-TC |
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Grade |
GM3225 |
|
Material |
316 |
|
Speed |
151 m/min |
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Feed |
2.309 mm/r |
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Depth |
1.51 mm |
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Cooling |
Water-based emulsion |
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Machining type |
External thread processing |
Why this case matters: A feed of 2.309 mm/r equals one thread pitch per revolution at 11 TPI. Running 151 m/min in 316 stainless steel with water-based emulsion sits in a fairly aggressive window. Pipe joints and valves are the most typical - and most easily ruined - BSPT/NPT applications: BSPT is a 55° tapered thread that seals by interference, so an inaccurate profile or a torn surface means leakage. For this type of enquiry, start from the case parameters.
Selection and Enquiry Checklist
To get an accurate quotation in one pass, include the following information in the enquiry.
|
Item |
Detail |
|
Insert size |
08 / 11 / 16 / 22 - must match the holder |
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External or internal |
E = external, I = internal; for internal, confirm the minimum bore diameter |
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Hand |
R = right-hand, L = left-hand |
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Thread standard |
ISO / UN / W / NPT / BSPT / RD / 60° / 55° |
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Pitch or TPI |
mm for metric, TPI for inch threads |
|
Workpiece material |
Used to confirm the recommended grade (steel / stainless / cast iron and others) |
|
Quantity |
Broken down by specification; mixed batches supported |
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