Engineering Reference

SNGA 190616 Insert

SNGA 190616 decoded: shape, clearance, tolerance class, mounting, inscribed circle, thickness and corner radius, with the ANSI equivalent (SNGA 644).

Data verified 2026-09-29 · based on ISO 1832:2017

Quick Answer

SNGA 190616 is an ISO 1832 turning insert. It is a 90° square negative insert with a 0° clearance, an inscribed circle of 19.05 mm (0.7500 in), a thickness of 6.35 mm and a corner radius of 1.6 mm — 8 usable corners.

Decoding SNGA 190616

An ISO 1832 designation has 13 possible positions, of which the first seven are mandatory. The first four form the design group and describe the insert's outline; the last three form the dimensions group and describe its size. Reading SNGA 190616 left to right:

Pos.SymbolMeaningValue for SNGA 190616
1SShape90° square — 90° nose angle, 8 corners per side
2NClearance angle0° — negative insert (double-sided)
3GTolerance classIC ±0.025 mm, edge position ±0.025 mm, thickness ±0.13 mm
4AMounting and chip breakerMounting style 2, chip breaker none
519Size (cutting edge ≈)Inscribed circle 19.05 mm (0.7500 in)
606Thickness6.35 mm (0.2500 in)
716Corner radius1.6 mm (0.0630 in)

Dimensions and tolerances

DimensionWhere it comes fromValue
DesignationISO 1832SNGA 190616
ANSI equivalentANSI B212.12SNGA 644
ShapePosition 1 — S90° square, 90° nose angle
Usable cornersPosition 1 and 2 combined8 (negative)
Clearance anglePosition 2 — N0°
Inscribed circle, dPosition 519.05 mm / 0.7500 in
Thickness, sPosition 66.35 mm / 0.2500 in
Corner radius, rPosition 71.6 mm / 0.0630 in
Tolerance on dClass G±0.025 mm
Tolerance on edge position, mClass G±0.025 mm
Tolerance on thickness, sClass G±0.13 mm

Tolerances are the ISO 1832 limits for tolerance class G. A premium manufacturer may hold tighter limits than the standard requires, but is unlikely to state this formally — so a delivered insert can be better than the table, never worse.

What this insert is for

Maximum edge strength and four corners. The first choice for heavy roughing, at the cost of high cutting force and almost no profiling ability.

Cylindrical fixing hole, no chip breaker. Used with a separate chip breaker or for short-chipping materials.

Ground inserts — tighter IC and edge position, used where indexing repeatability matters.

Value Sources

Each data column on this page is tied to the source it came from. The numbers in square brackets correspond to the table headers above.

#SourceTypeRevision / method
[1]ANSI B212.12 — Indexable inserts, identification systemstandardANSI B212.12-1991 (R2017)
[2]Field values computed from the designationderivedEvery field on this page is decoded from the designation letters and digits using the ISO 1832 symbol tables. Nothing is looked up from a catalogue, and the inch values are computed as millimetres ÷ 25.4.
[3]ISO 13399 — Cutting tool data representation and exchangestandardISO 13399-1:2006
[4]ISO 1832 — Indexable inserts for cutting tools, designationstandardISO 1832:2017 — source
[5]ISO 513 — Classification and application of hard cutting materialsstandardISO 513:2012

Data Sources

StandardRevisionWhat it covers on this page
ISO 1832 — Indexable inserts for cutting tools, designationISO 1832:2017all seven designation positions and their symbol tables
ISO 13399 — Cutting tool data representation and exchangeISO 13399-1:2006the ISO 13399 codes given for each dimension
ANSI B212.12 — Indexable inserts, identification systemANSI B212.12-1991 (R2017)the ANSI inch designation and its size, thickness and radius symbols

Cross-checked against:

Derived values — the following values on this page are calculated, not taken directly from the standard:

ValueHow it is derived
All fieldsDecoded from the designation by the ISO 1832 symbol tables in the page generator.

Only positions 1 to 7 are decoded. Positions 8 to 13 describe edge preparation, wiper geometry, cutting direction and other features, and are manufacturer-specific. The ISO 1832 tables define the envelope; the chip breaker geometry behind position 4 is proprietary and is not described by the standard.

Accuracy and use. The values on this page are compiled from the published standards and cross-checked sources listed above. Where values are derived, the derivation is stated. No warranty, express or implied, is made as to the accuracy or completeness of this information, and no liability is accepted for any loss or damage arising from its use. Engineering reference data is provided for guidance in preliminary work — before a value is used for design, fabrication or acceptance testing, verify it against the current revision of the governing standard and against your own inspection. The user assumes all risk and responsibility in connection with the use of this information.

Cite This Page

Every value on this page is traceable to the sources listed above. If you use the data in a document, paper or report, cite it as:

Each row in the tables above also has a permanent link — hover a row and use the # link to cite a single value rather than the whole page.