⚠️ Required: 0° Negative Relief Carbide Inserts (CN INSERT)

Per ISO 1832 nomenclature: the letter "N" in Position 4 of the tool holder code designates 0° negative relief — the strongest cutting edge geometry, used for heavy roughing and interrupted cuts. Per ISO 1832, the 2-letter prefix for the matching insert family is CN (NOT CC — that prefix means positive 7° relief inserts which will not seat correctly on this holder).

Compatible inserts (ISO 1832 "CN" negative family): CNMG / CNMM / CNGA / CNMX (C-shape, 0° negative, ISO 1832) · DNMG / DNMM / DNGA / DNMX (D-shape, 0° negative, ISO 1832) · SNMG / SNMM / SNGA / SNMX (S-shape, 0° negative, ISO 1832) · WNMG / WNMM / WNGA / WNMA (W-shape, 0° negative, ISO 1832).

Why this matters: A negative-relief insert (e.g. CNMG) has its cutting edge set at 0° clearance, giving the strongest cutting edge for heavy roughing. A positive-relief insert (e.g. CCMT) has 7° clearance, giving a sharper but weaker edge — these are different insert families per ISO 1832. Pairing a negative-insert holder (CN INSERT = this catalog) with positive-relief inserts (CC family like CCMT) causes insert-pocket mismatch, chatter, premature wear, and insert breakage risk. Always verify Position 4 = "N" matches your insert series.

BEYOND-Original Tool Holders from Hangzhou, China

All 18 tool holders in this catalog are 100% genuine BEYOND — manufactured by BEYOND in Hangzhou, China. Each holder is CNC-machined from premium alloy steel (DIN 1.3343 / AISI M2 equivalent), heat-treated to HRC 60-62, and precision-ground for shank and pocket tolerances within ±0.01mm. Every tool holder follows the BEYOND 9-position code structure: a 5-letter prefix identifying fastening mode, insert shape, approach angle, relief angle, and hand direction, followed by a 4-digit shank spec identifying shank height, width, total length, and insert IC code.

About BEYOND Lever Lock System External Holder — P-Type Quick-Change Square-Shank Holders for CNMG/DNMG/SNMG/WNMG Inserts

BEYOND Lever Lock External Holders — Square-Shank Tool Holders with Lever-Lock Clamping System for Fast Insert Changes in High-Volume Production Turning

This catalog contains 6 unique BEYOND tool holder specifications across 1 fastening mode, 4 insert shapes, 3 approach angles, 1 relief angle, and 2 hand configurations.

BEYOND 9-Position Tool Holder Code Structure (per official catalog diagram):

Examples:

• DCLNR2020K12 = D(dual clamping) + C(80° Quadrilateral / CCMT family) + L(95° approach angle) + N(0° negative relief) + R(Right-hand), shank 20×20 mm standard length 125 mm, IC 12.7 mm.
• SVJCR2525M16 = S(central screw) + V(35° Quadrilateral / VCMT-VBMT insert) + J(93° approach angle) + C(7° positive relief) + R(Right-hand), shank 25×25 mm long 150 mm, IC 15.875 mm.
• SRGCR1212H09 = S(central screw) + R(Round insert / RCMT) + G(45° approach angle with 90° secondary) + C(7° positive relief) + R(Right-hand), shank 12×12 mm short 100 mm, IC 9.525 mm.

BEYOND tool holders are fully interchangeable with all major carbide insert brands per ISO 1832 (insert shape) and ISO 5608 (insert pocket). Inserts from Sandvik, Kyocera, Mitsubishi, Sumitomo, Korloy, ZCC.CT, Walter, Iscar and other leading manufacturers all fit BEYOND holders with matching 5-letter codes. Each holder ships with a Torx-key or pin wrench and factory calibration certificate.

How to Choose the Right BEYOND Tool Holder (9-Position Code Decision Tree)

Selecting the correct BEYOND tool holder follows the 9-position code in sequence per the official catalog:

1. Position 1 — Fastening mode: S = central screw (ISO standard, most common for screw-clamp holders); C = top clamp with pressure plate (economical); D = dual clamping (top + side); M = strong multi-point clamping (heavy roughing); P = pin / slot-lever clamp (no insert hole); A = back clamping; W = wedge clamping.
2. Position 2 — Insert shape (ISO 1832): Match your insert series — C 80° rhombic (CCMT/CCGT family), D 55° rhombic (DCMT/DCGT), R round (RCMT for 70° countersink or RPMT for 90° countersink), S square (SCMT/SCGT), T triangle (TCMT/TCGT), V 35° rhombic (VCMT/VCGT + VBMT/VBGT), W hexagon (WNMG/WCMX).
3. Position 3 — Approach angle: F 90°; G 45°; J 93°; L 95°; H 107.5°; P 117.5°; A 90°; B/K/R 75°; D/S/T/Q 45°; E 60°; N 63°; V 72.5°; U 93°; W 50°; Y 85°. Choose by shoulder clearance / profiling depth.
4. Position 4 — Relief angle: C 7° (standard, most common); B 5°; D 15°; E 20°; N 0° (negative, heavy roughing); P 11° (positive, finishing).
5. Position 5 — Hand: R Right-hand (most common); L Left-hand; N No direction (universal, both hands).
6. Positions 6-7 — Shank height × width (mm): 1212 / 1616 / 2020 / 2525 / 3232 etc. For 12-station CNC lathes use 1212 or 1616; for heavy-duty lathes use 2525 or 3232.
7. Position 8 — Shank total length code: K 125 mm (standard, most common); H 100 mm (short); M 150 mm (long); P 170 mm (extra long); full range 32-500 mm.
8. Position 9 — Insert IC code: 07 = 6.35 mm, 09 = 9.525 mm, 12 = 12.7 mm, 16 = 15.875 mm, 19 = 19.05 mm, 25 = 25.4 mm.

Tip: All BEYOND tool holders are interchangeable with leading carbide insert brands per ISO 1832 (insert shape) and ISO 5608 (insert pocket). Inserts from Sandvik, Kyocera, Mitsubishi, Sumitomo, Korloy, ZCC.CT, Walter and Iscar all fit matching BEYOND holders.