• Sumitomo Electric Hardmetal GNDN Necking Holder
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Sumitomo Electric Hardmetal GNDN Necking Holder

Sumitomo Electric Hardmetal GNDN Necking Holder

SEC grooving holder GNDN type for corner necking (undercut) operations with clamp-on insert.

Key features

  • Corner necking possible
  • Uses GCM RN inserts
GNDN R2020K-215-020 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN L2020K-215-020 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN R2020K-320-020 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN L2020K-320-020 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN R2020K-430-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 24 | Cutting height HF (mm): 20 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN L2020K-430-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 24 | Cutting height HF (mm): 20 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN R2020K-535-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN L2020K-535-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN R2020K-640-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN L2020K-640-030 Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN R2525M-215-020 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN L2525M-215-020 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN R2525M-320-020 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN L2525M-320-020 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN R2525M-430-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 29 | Cutting height HF (mm): 25 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN L2525M-430-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 29 | Cutting height HF (mm): 25 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN R2525M-535-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN L2525M-535-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN R2525M-640-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN L2525M-640-030 Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
Grooving HoldersSumitomo Electric Hardmetal
20 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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Sumitomo Electric Hardmetal GNDN Necking Holder

Brand Sumitomo Electric Hardmetal·Grooving Holders

Available part numbers (20)

GNDN R2020K-215-020, GNDN L2020K-215-020, GNDN R2020K-320-020, GNDN L2020K-320-020, GNDN R2020K-430-030, GNDN L2020K-430-030, GNDN R2020K-535-030, GNDN L2020K-535-030, GNDN R2020K-640-030, GNDN L2020K-640-030 + 10 more — see full table ↓

How to order

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Product codes & specifications
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Product codeSpec
GNDN R2020K-215-020Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN L2020K-215-020Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN R2020K-320-020Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN L2020K-320-020Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 23 | Cutting height HF (mm): 20 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN R2020K-430-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 24 | Cutting height HF (mm): 20 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN L2020K-430-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 24 | Cutting height HF (mm): 20 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN R2020K-535-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN L2020K-535-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN R2020K-640-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN L2020K-640-030Height H (mm): 20 | Width B (mm): 20 | Length LF (mm): 125 | WF (mm): 25 | Cutting height HF (mm): 20 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN R2525M-215-020Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN L2525M-215-020Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 2.0 | APMX (mm): 1.5 | APMX2 (mm): 0.64 | Stock: Yes
GNDN R2525M-320-020Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN L2525M-320-020Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 28 | Cutting height HF (mm): 25 | Head length LH (mm): 35 | Offset WF2 (mm): 3.0 | Min machining dia DMIN (mm): 20 | Cutting width CW (mm): 3.0 | APMX (mm): 2.0 | APMX2 (mm): 0.79 | Stock: Yes
GNDN R2525M-430-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 29 | Cutting height HF (mm): 25 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN L2525M-430-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 29 | Cutting height HF (mm): 25 | Head length LH (mm): 37 | Offset WF2 (mm): 4.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 4.0 | APMX (mm): 3.0 | APMX2 (mm): 1.29 | Stock: Yes
GNDN R2525M-535-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN L2525M-535-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 5.0 | APMX (mm): 3.5 | APMX2 (mm): 1.44 | Stock: Yes
GNDN R2525M-640-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes
GNDN L2525M-640-030Height H (mm): 25 | Width B (mm): 25 | Length LF (mm): 150 | WF (mm): 30 | Cutting height HF (mm): 25 | Head length LH (mm): 40 | Offset WF2 (mm): 5.0 | Min machining dia DMIN (mm): 30 | Cutting width CW (mm): 6.0 | APMX (mm): 4.0 | APMX2 (mm): 1.59 | Stock: Yes

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