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Carbide insert LPGT 070304 R-F55 WTP Walter
13280
€1.62 tax inc.
Net price: €1.32
Description
LPGT 070304 turning insert – rectangular single-sided 90° insert
| Technical data | |
|---|---|
| Edge length l | 7.94 mm |
| Insert thickness s | 3.18 mm |
| Corner radius rε | 0.4 mm |
WTP carbide rectangular insert – applications and design
single-sided, positive 11° geometry with a hole and chip breaker
The LPGT 070304 turning insert is a single-sided, rectangular indexable insert made of Walter WTP grade cemented carbide, designed for turning hard and difficult-to-machine steels. The L shape, a rectangle with a 90° included angle, provides two cutting edges along the longer side of the insert. Positive geometry with a 11° clearance angle reduces cutting forces and promotes smooth entry of the cutting edge into the material. Tolerance class G denotes an insert ground on the flank and seating faces, providing highly repeatable edge positioning. The nose radius rε 0.4 mm and the hole with a countersink and single-sided chip breaker make it suitable for finishing operations.
Key features of the WTP cemented carbide insert
- Positive 11° geometry — lower cutting forces and less tendency to vibrate when turning slender and thin-walled workpieces.
- Class G ground insert — precise dimensions and repeatable edge positioning after indexing, essential for finishing to tight tolerances.
- Corner radius rε 0.4 mm — a small radius for finishing at low feed rates and achieving a smooth surface.
- Rectangular 90° shape with two cutting edges along the longer side, used in succession as each becomes dull.
- The hole with a 40–60° countersink allows the insert to be secured in the holder pocket with a central screw.
- Walter WTP carbide grade selected for hard and difficult-to-machine steels that require a durable cutting edge.
Rectangular insert applications and parameter selection
The LPGT 070304 insert (also written without a space as lpgt070304) is suitable for precision turning and undercutting of small workpieces made of steels with increased hardness. Calculate spindle speed using n = 1000·Vc/(π·D): assuming an example cutting speed of Vc = 120 m/min for steel finishing and a workpiece diameter of D = 20 mm, the result is approximately 1909 rpm. Since the product data for grade WTP does not specify ISO groups or coating details, select the exact speeds and feeds from the manufacturer's table for the specific steel. The single-sided design and small nose radius make this insert primarily suitable for light finishing passes with a small depth of cut.
The design with a central hole and a 40–60° countersink enables secure screw clamping of the insert without an additional lever or clamping wedge. The LPGT 0703 family also includes variants with different dimensions, so before purchasing, confirm that the holder pocket is compatible with the edge length of 7.94 mm and thickness of 3.18 mm. When turning difficult-to-machine alloy and stainless steels, maintain continuous coolant delivery and rigid workpiece clamping to reduce vibration and work hardening of the layer being cut. Stable operating conditions extend ground edge life and improve the quality of the machined surface.
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Application limitation
The single-sided, ground insert with a corner of rε 0.4 mm offers only 2 edges and is designed for light finishing with a small depth of cut — do not use it for rough turning with a large chip cross section. Cutting data for grade WTP should be confirmed in the manufacturer's table.
Rectangular insert designation decoder according to ISO 1832
how to read the LPGT 070304 code — designation positions 1–7
Designation LPGT 070304 according to the standard ISO 1832: 4 letters describe geometry and construction, 3 numeric codes describe dimensions. Each field has a number, an icon, and a brief description.
Frequently asked questions about the LPGT 070304 insert
number of edges, clamping and material compatibility
Two — the rectangular shape and single-sided, positive geometry (11° clearance angle) provide 2 edges that cut along the longer side. When one edge becomes dull, the insert is indexed in the holder pocket without replacing it.
Holders with a rectangular pocket designed for size 07 LPGT inserts, securing the insert with a central screw through the hole with a 40–60° countersink. Select the specific holder type and shank cross section according to the manufacturer's table and the insert dimensions: edge length 7.94 mm and a thickness of 3.18 mm.
Inserts in the LPGT 0703 family differ mainly in nose radius and dimensions. The variant rε 0.4 mm has a small corner radius for finishing at low feed rates and achieving a smooth surface; larger radii increase edge strength at the expense of surface finish. Before selecting an insert, compare its edge length and thickness with the holder pocket.
Yes — grade WTP from Walter is designed for hard and difficult-to-machine steels. Maintain a constant feed rate and continuous coolant delivery, as difficult-to-machine steels conduct heat poorly and work-harden. Select the exact cutting speeds and feed rates from the manufacturer's data sheet for the specific steel.
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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