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Carbide insert LNUX 191940 PR 4215 Sandvik
€29.13 tax inc.
Net price: €23.68
Description
LNUX 191940 turning insert – rectangular insert for wheelset turning
| Technical data | |
|---|---|
| ISO designation | LNUX 191940 |
| Side length l | 19.05 mm |
| Insert thickness s | 19.05 mm |
| Corner radius rε | 4 mm |
| Grade | 4215 |
| Manufacturer | Sandvik |
Rectangular grade 4215 carbide insert – applications and design
roughing geometry for wheel profiling on underfloor wheel lathes
The LNUX 191940 turning insert is a rectangular indexable insert made of cemented carbide in grade 4215, intended for turning railway rolling stock wheelsets. Shape L, a rectangle with a 90° corner angle and a large rε 4 mm corner radius, reproduces the wheel tread profile during roughing. Negative geometry with a 0° clearance angle provides a strong, durable cutting edge under heavy-duty operating conditions. Grade 4215 from the Swedish company Sandvik is a cemented carbide selected for turning the steel used in locomotive and railcar wheels.
Key features of the LNUX 191940 insert
- Large corner radius rε 4 mm — reproduces the wheel tread profile and strengthens the edge during roughing.
- Carbide grade 4215 — selected by Sandvik for turning the steel used in railway rolling stock wheelsets.
- Rigid, rectangular geometry — the edge length and 19.05 mm thickness withstand high cutting forces without vibration.
- Negative geometry with a 0° clearance angle provides a strong edge for heavy stock removal.
- Intended for underfloor wheel lathes — reconditioning locomotive and railcar wheels without removing the wheelset.
- Dimensions conform to the ISO 1832 designation: edge length 19.05 mm, corner radius 4 mm.
Wheelset turning applications and cutting parameter selection
LNUX inserts operate on underfloor wheel lathes that recondition wheelsets without removing them from the vehicle. The large corner radius and rigid rectangular geometry allow substantial stock removal in a single pass and restore the correct wheel tread profile. Regular tread reconditioning restores the correct wheel profile and diameter, directly contributing to the safety and ride comfort of the rail vehicle. The 19.05 mm edge length and 19.05 mm insert thickness give the tool the mass and rigidity needed to withstand high cutting forces. These turning inserts are used in rolling stock maintenance, where profile repeatability and edge wear resistance are essential.
The LNUX 191940 insert (also written without a space as lnux191940) is suitable for reconditioning wheels with diameters of several hundred millimeters. Calculate spindle speed using n = 1000·Vc/(π·D): for a wheel with a diameter of 900 mm and an example cutting speed Vc = 60 m/min, the result is approximately 21 rpm. Such low speeds are typical of underfloor wheel lathes with large turning diameters. In workshop practice, the depth of cut and feed depend on the wheel condition and the amount of stock remaining after service. Determine the exact speed and feed from the tool data sheet and the grade of steel being machined, as we do not publish a cutting data table for this carbide.
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Verify the thickness before selecting a tool holder
The source data specifies an insert thickness of 18.85 mm, whereas the designation ISO 1832 indicates s = 19.05 mm. Before selecting the pocket, shim, and screw, check the exact dimension in the manufacturer's tool data sheet.
Rectangular insert designation decoder according to ISO 1832
how to read the LNUX 191940 code — designation positions 1–7
Designation LNUX 191940 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 LNUX 191940 insert
design, applications, and insert selection for wheel turning
This insert has a roughing, profiling geometry — it cuts primarily with the corner with a radius of rε 4 mm and the main cutting edge along the long side of the rectangle. Negative geometry (0° clearance angle) allows both sides of the insert to be used, reducing the cost per cutting edge when turning wheelsets.
It is used for turning railway rolling stock wheelsets — locomotive and railcar wheels — on underfloor wheel lathes. The large corner radius reproduces the wheel tread profile, and grade 4215 is suitable for roughing steel. These turning inserts are used in the maintenance and reconditioning of railway vehicles.
LNUX inserts differ mainly in edge length and corner radius, which must match the tool holder pocket and the profile of the wheel being machined. Version 191940 has an edge length of 19.05 mm and corner radius rε 4 mm. Before ordering, compare these dimensions with the designation of the tool holder in use and the tool data sheet.
The insert is made of cemented carbide in grade 4215 from Sandvik. This grade was selected for turning wheelset steel and for roughing. Confirm the exact cutting parameters in the manufacturer's tool data sheet, as we do not provide an ISO group table for this grade.
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| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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