ABW23R5005 PR930 (10pcs)
ABS15R4015M PR1425 (10pcs)
ABS15R4015M PR1005 (10pcs)
ABW15R4015 PR930 (10pcs)
ABS15R4015 PR930 (10pcs)
ABS15R4005 PR930 (10pcs)
Kyocera Back Turning Inserts — 6 Genuine ABW/ABS Series in Stock
Factory-direct supply of 6 genuine Kyocera back turning inserts in stock at CNCHome-Beyond, covering Kyocera’s industry-standard ABW (wide back turning) and ABS (standard back turning) series in 3 CVD steel grades (PR1005, PR1425, PR930). Every insert is original Kyocera Japan stock, ISO 1832 standard compliant, and shipped globally at 30-50% below OEM list price. Kyocera has been the dominant supplier of back turning inserts since the 1990s — the ABW/ABS geometry is the de facto industry standard replicated by Sandvik, Mitsubishi, and Iscar.
- 100% genuine Kyocera Japan — sourced directly from the Japan factory, hologram-sealed boxes, traceable lot numbers
- 30-50% below OEM list price — factory-direct pricing with no middleman markup
- ISO 1832 standard compliant — every insert follows the international designation system
- Industry-standard ABW/ABS geometry — identical fit as the original Kyocera holders, also cross-compatible with Sandvik QFS / Mitsubishi GY / Iscar DO-GRIP holders
- Free global shipping — DHL / UPS / FedEx 3-7 day delivery to 50+ countries
- Volume discounts — 2-9 pieces 6% off, 10+ pieces 12% off
What is “Back Turning”? (and Why Kyocera Leads)
Back turning is a specialized turning operation where the tool feed direction is opposite to the spindle rotation (from the workpiece end toward the chuck). The primary applications are:
- Thread relief undercuts — the small groove at the shoulder of a threaded shaft, allowing the die to run out cleanly
- Seal grooves — the O-ring or lip-seal groove near the chuck end of a shaft
- Assembly clearance undercuts — recessed pockets that allow mating parts to seat flush
- Chucking-end locking grooves — snap-ring or circlip grooves at the workpiece end
Conventional turning tools can’t access these areas because the tool holder would interfere with the chuck or the spindle. Back turning inserts have a reverse geometry (tool approaches from the back side) with a narrow, elongated shank that fits into tight spaces.
Kyocera introduced the ABW (wide back turning) and ABS (standard back turning) series in the 1990s. Today, these geometries are the de facto global standard — Sandvik QFS, Mitsubishi GY, and Iscar DO-GRIP holders all accept Kyocera ABW/ABS inserts, and every major carbide brand offers a cross-compatible equivalent. Choosing genuine Kyocera means you get the original geometry, the tightest tolerances, and the most predictable tool life.
ABW vs ABS — When to Choose Each
| Feature | ABW (Wide Back Turning) | ABS (Standard Back Turning) |
|---|---|---|
| Cutting width | Wide (5-23 mm, one-pass roughing) | Narrow (1-3 mm, precision grooving) |
| Body strength | Reinforced thick body for heavy cuts | Slim body for fine features |
| Depth of cut | 1.5 - 3.0 mm (replaces 3-4 standard turning passes) | 0.1 - 1.5 mm (precision form grooves) |
| Typical application | Heavy undercut, large relief groove, replacing multiple standard passes | Seal groove, precision thread relief, snap-ring groove |
| Best grade for steel | PR930 (heavy, P20-P35) | PR1425 (general, P20-P30) or PR1005 (precision, P01-P10) |
| Examples in this collection | ABW23R5005, ABW15R4015 | ABS15R4015, ABS15R4015M |
3 Kyocera CVD Steel Grades in Stock
All 6 inserts in this collection use Kyocera’s proprietary PR series CVD-coated carbide, optimized specifically for steel back turning. The PR series is different from Kyocera’s standard turning grades — the coating is engineered for the reverse cutting direction and the chip entanglement risk unique to back turning.
| Grade | Coating | Workpiece (ISO) | Best Application |
|---|---|---|---|
| PR1005 | CVD TiCN-Al2O3 | P01-P10 (low-carbon steel, free-machining) | Precision back turning, finishing seal grooves with tight tolerance (±0.02 mm), 0.1-0.3 mm depth |
| PR1425 | CVD multi-layer | P20-P30 (general steel, alloy steel) | General-purpose back turning, the workhorse grade for medium-depth grooves, 0.3-1.5 mm depth |
| PR930 | CVD tough substrate | P20-P35 (heavy steel, interrupted cuts) | Heavy-duty back turning, ABW series 1.5-3.0 mm depth, 0.4-0.5 mm radius reinforced |
Kyocera’s CVD PR-series grades use the company’s proprietary MEGACOAT coating technology — a family of high-performance Al2O3-based coatings that excel in the high-heat, high-pressure environment of back turning. MEGACOAT NANO is the latest generation, offering 2-3x longer tool life vs standard CVD coatings in interrupted-cut back turning applications.
Full SKU List (6 Inserts)
| SKU | Series | Cutting Width | Nose Radius | Grade | Application |
|---|---|---|---|---|---|
| ABW23R5005 PR930 | ABW (Wide) | 23 mm | 0.5 mm | PR930 | Heavy undercut, large relief groove |
| ABW15R4015 PR930 | ABW (Wide) | 15 mm | 0.4 mm | PR930 | Medium-heavy undercut, single-pass roughing |
| ABS15R4015 PR930 | ABS (Standard) | 15 mm | 0.4 mm | PR930 | Standard groove in tough steel |
| ABS15R4015 PR1425 | ABS (Standard) | 15 mm | 0.4 mm | PR1425 | General-purpose seal groove |
| ABS15R4015M PR1425 | ABS (M-finish) | 15 mm | 0.4 mm | PR1425 | Medium-finish seal groove |
| ABS15R4015M PR1005 | ABS (M-finish) | 15 mm | 0.4 mm | PR1005 | Precision finishing seal groove |
Compatible Tool Holders
ABW/ABS inserts use a dedicated Kyocera ABW-AR / ABS-AR series holder with a ratcheting (saw-tooth) locking mechanism. Cross-compatible with other brands:
| Holder Brand | Holder Series | Insert Fit |
|---|---|---|
| Kyocera (original) | ABW-AR / ABS-AR series | ABW23, ABW15, ABS15 |
| Sandvik | QFS 90° back turning series | ABW15 / ABS15 (geometry-compatible) |
| Mitsubishi | GY series | ABW15 / ABS15 (geometry-compatible) |
| Iscar | DO-GRIP back turning series | ABW15 / ABS15 (geometry-compatible) |
Recommended Cutting Parameters
| Grade | Workpiece | Cutting Speed Vc (m/min) | Feed f (mm/rev) | Depth ap (mm) | Coolant |
|---|---|---|---|---|---|
| PR1005 | Low-carbon steel (1018 / SS400) | 150 - 250 | 0.05 - 0.15 | 0.1 - 0.3 | Flood or high-pressure |
| PR1425 | Medium-carbon steel (1045 / S45C) | 120 - 200 | 0.05 - 0.20 | 0.3 - 1.5 | Flood required |
| PR1425 | Alloy steel (4140 / SCM440) | 100 - 180 | 0.05 - 0.15 | 0.3 - 1.2 | Flood required |
| PR930 | Carbon / alloy steel (heavy ABW) | 100 - 180 | 0.10 - 0.25 | 1.5 - 3.0 | Flood required |
| PR930 | Stainless steel (with care) | 80 - 150 | 0.05 - 0.15 | 0.3 - 1.0 | High-pressure required |
Why Back Turning Inserts Need Special Grade Selection
Regular turning inserts (CNMG, DNMG, VBMT, etc.) do not work well for back turning because:
- Reverse cutting forces — the insert sees tensile rather than compressive stress on the cutting edge, requiring a tougher substrate
- Chip entanglement — chips flow toward the workpiece instead of away, requiring a sharper edge and tougher coating
- Tight clearance — the insert must navigate the gap between the chuck and the workpiece shoulder, requiring a slim shank and a non-standard mounting angle
- Coolant flow — the holder must route high-pressure coolant directly to the cutting edge, requiring internal coolant channels
Kyocera’s PR series solves these problems with a specialized substrate composition, an optimized rake face, and ratcheting holder design. Do not substitute a standard CNMG insert for an ABW/ABS insert — the result is insert chipping within 1-2 passes and likely workpiece scrap.
Frequently Asked Questions
Q: What is the difference between ABW and ABS?
ABW (Wide Back Turning) is designed for heavy undercutting in a single pass — cutting widths from 5-23 mm, depths up to 3.0 mm. ABS (Standard Back Turning) is for precision form grooves like seal grooves, snap-ring grooves, and thread relief undercuts — cutting widths from 1-3 mm, depths up to 1.5 mm. Choose ABW when you need to remove a lot of material in one pass; choose ABS when you need a precision groove with tight tolerance.
Q: Can I use Kyocera ABW/ABS inserts in non-Kyocera holders?
Geometry-wise, yes — Sandvik QFS, Mitsubishi GY, and Iscar DO-GRIP holders all accept the same ABW/ABS geometry. However, the locking mechanism is slightly different across brands, which can cause micro-clearance and reduce tool life by 10-15%. For best results, we recommend using Kyocera original ABW-AR / ABS-AR holders with Kyocera inserts.
Q: How do I choose between PR1005, PR1425, and PR930?
Use this quick guide:
- PR1005 — precision finishing of low-carbon steel, seal grooves with tight tolerance, depth < 0.3 mm
- PR1425 — general purpose, the default for most steel back turning, depth 0.3-1.5 mm
- PR930 — heavy ABW cuts, alloy steel, interrupted cuts, depth > 1.5 mm
Q: Can I use these inserts on stainless steel?
Yes, but with caution. Kyocera PR grades are optimized for carbon / alloy steel. On stainless steel (304 / 316), the cutting temperature rises and the insert wears faster. Use PR1425 or PR930 with high-pressure coolant (70+ bar), and reduce cutting speed to 80-150 m/min. For dedicated stainless back turning, contact us for custom grade recommendations.
Q: How does back turning differ from grooving?
Both cut narrow grooves, but:
- Back turning uses a slim insert that approaches from the back side of the workpiece, useful for grooves near shoulders, flanges, or the chuck end. Cut widths typically 5-23 mm.
- Grooving uses a wider insert that cuts perpendicular to the workpiece axis, useful for snap-ring grooves, O-ring grooves, and parting-off. Cut widths typically 1-5 mm.
Q: Do you offer custom Kyocera ABW/ABS sizes?
Yes. The 6 SKUs in stock cover the most common 15-23 mm widths. For custom widths (5-30 mm), custom radii (0.2-1.6 mm), or special nose geometries, our engineering team can source from Kyocera Japan factory in 7-14 days. Contact us at chao@cnchome-beyond.com or WhatsApp +86 159 9066 3752 with your requirements.
Shop Related Kyocera Collections
Browse the full Kyocera catalog at CNCHome-Beyond. Kyocera has 21+ sub-collections covering every major insert family:
- Kyocera Brand Page — all Kyocera product lines, MEGACOAT coating technology, engineering support
- Kyocera Negative Turning Inserts — CNMG / DNMG / WNMG / TNMG / SNMG 0° double-sided inserts for heavy roughing
- Kyocera Positive Turning Inserts — CCMT / DCMT / TCMT / VBMT 7° single-sided inserts for finishing and aluminum
- Kyocera Threading Inserts — 16ER / 16IR threading inserts in PR1225 grade
- Kyocera Grooving Inserts — snap-ring, O-ring, and parting-off grooves (often paired with back turning)
- Kyocera CN 80° Diamond Negative — CNMG / CNMA 80° square turning inserts (most popular shape)
- Kyocera DN 55° Diamond Negative — DNMG / DNMA 55° diamond turning inserts (profiling)
Other Global Brand Back Turning & Turning Inserts
CNCHome-Beyond also stocks equivalent back turning and turning inserts from the world’s top carbide brands. Compare grades, lead times, and pricing:
- KORLOY Brand Page — Korean carbide manufacturer, ISO 9001 certified, 12 grades for steel / stainless / cast iron
- KORLOY Master Catalog — 557 SKUs of CNMG / DNMG / VNMG / WNMG / TNMG / SNMG in grades NC3225 / NC3030 / NC9125 / PC8110
- Tungaloy Brand Page — Japanese carbide specialist, 90+ years in cutting tools
- Tungaloy Master Catalog — 443 SKUs of CNMG / DNMG / CCMT / VBMT in T9000 / AH8000 series
- TaeguTec Brand Page — Korean multinational, ISCAR group sister brand
- TaeguTec Master Catalog — full turning + milling + drilling lineup in TT7000 / TT9080 / TT5515 grades
Shop More from CNCHome-Beyond
- Premium Carbide Inserts (All Global Brands) — 5,880 SKUs across 8 brands (Sandvik / Mitsubishi / Tungaloy / KORLOY / Iscar / Kyocera / OYYU / BEYOND)
Need a Custom Kyocera Back Turning Insert? Request a Quote
Our engineering team can source any Kyocera ABW/ABS geometry (custom widths 5-30 mm, custom radii 0.2-1.6 mm, special nose geometry, or rare grades like PR1310 / PR1525) within 7-14 days from Kyocera Japan factory direct.