Description
Product Overview
The Sandvik Coromant S20S-CTFPR-11 is a 20mm round-shank, right-hand boring bar designed for internal turning and profiling operations on CNC lathes and turning centres. Built to accept TPFR-style triangular negative inserts (TPMT/TPGT 110308 / 11T308 series), this bar is engineered for precision internal work where rigidity, repeatability, and consistent insert indexing matter most. New Old Stock, still in original packaging — a genuine opportunity to put a premium Sandvik Coromant boring bar on your turret at used-tool pricing.
- 20mm round shank with 200mm (approx.) overhang capacity — The S20S designation confirms a 20mm shank diameter. A steel-bodied boring bar at this shank size delivers the rigidity needed to hold diameter tolerance on internal bores without chatter, particularly in shorter-to-medium overhangs typical of CNC lathe turret work.
- CTFPR-11 insert pocket geometry — The CTFPR designation specifies a right-hand cutting direction with a 91° lead angle, using screw-clamp (top-clamp) retention for triangular (T-style) negative inserts. This geometry produces excellent chip clearance on through-bores and blind-bore profiling, and the negative rake keeps cutting forces predictable on steels and cast irons.
- Compatible with TPMT / TPGT 110308 (11T308) insert range — The “-11” suffix confirms the IC (inscribed circle) size: 11mm triangular inserts. Sandvik’s own CoroTurn 107 TPGT 110308 inserts are the go-to choice, available in grades covering steels (GC1125, GC4325), stainless (GC2025), cast iron (GC3210), and non-ferrous (H13A). Third-party TPMT 110308 inserts are widely compatible and cost-effective for roughing work.
- Steel shank construction — Standard steel-body boring bars suit the majority of internal turning applications where bore diameters and overhangs are within conservative L/D ratios (generally up to 4×D). For extreme overhangs, Sandvik’s carbide-shank or Silent Tools variants would be the step up — but for everyday CNC lathe boring work this bar is the right tool.
- Ideal for — Internal diameter turning and finishing on CNC lathes; profiling stepped and chamfered bores; boring to close-tolerance fits (H7/H6) in steel, cast iron, aluminium, and brass; production and one-off toolroom turning where consistent insert indexing and repeatable tool offsets are critical.
Condition
New Old Stock / Light Used
This boring bar presents well, the shank shows no chuck marks, turret-clamp witness marks, or wear to the precision-ground shank diameter. The insert pocket is clean with no carbide rub, seating-face wear, or damaged screw threads. The clamping screw and any original accessories included by Sandvik are present. Surfaces may carry a light storage patina or minor oxidation on non-ground areas of the shank from shelf time — this is cosmetic only and has zero impact on the bar’s dimensional accuracy or function in the turret. The ground shank diameter is the reference surface that matters, and it is clean.
Included:
- 1 × Sandvik Coromant S20S-CTFPR-11 boring bar (20mm shank, right-hand, TPMT/TPGT 11-size inserts)
- Original Sandvik Coromant packaging / box
- Original Sandvik accessories (clamping screw and torx key as supplied by Sandvik)
Not included: Cutting inserts (TPMT/TPGT 110308 — sourced separately from any Sandvik Coromant distributor or compatible third-party supplier).
Brand Information
Sandvik Coromant is a Swedish precision cutting tools manufacturer and a division of the Sandvik Group, founded in 1942 and headquartered in Sandviken, Sweden. They are the benchmark brand in indexable carbide tooling globally — sitting in the same premier tier as Kennametal, Iscar, and Seco — and their toolholders, inserts, and boring bars are standard specification on production CNC lines and toolrooms worldwide, including throughout Australian manufacturing. Sandvik Coromant’s toolholder dimensions and insert geometries are ISO-standard and well-documented, meaning spare inserts, technical data sheets, and application support are readily accessible through AU distributors.
Specifications
| Feature | Specification |
|---|---|
| Brand | Sandvik Coromant |
| Model / Part Number | S20S-CTFPR-11 |
| Type | Internal turning / boring bar — indexable insert |
| Shank Shape | Round (cylindrical) |
| Shank Diameter (D1) | 20mm |
| Overall Length (L1) | approximately 200mm (refer Sandvik catalogue for confirmed L1) |
| Minimum Bore Diameter | approximately 25mm (refer Sandvik catalogue for confirmed Dmin) |
| Cutting Direction | Right-hand (R) |
| Lead Angle / Insert Style | CTFPR — 91° approach angle, top-clamp, triangular negative insert |
| Insert Compatibility | TPMT 110308 / TPGT 110308 (11T308) — 11mm IC triangular inserts |
| Compatible Sandvik Insert Grades | TPGT 110308-F1 H13A (aluminium/non-ferrous); TPMT 110308-MF GC1125 (steel finishing); TPMT 110308-MM GC4325 (steel general); TPMT 110308-MF GC2025 (stainless); TPMT 110308-MR GC3210 (cast iron) — verify current grade availability with Sandvik AU distributor |
| Shank Material / Construction | Steel |
| Country of Origin | Sweden |
| Condition | NOS / Lightly used |
| Included Items | Boring bar, original box/packaging, original Sandvik accessories (screw, key) |
| Not Included | Cutting inserts (TPMT/TPGT 110308 — sold separately) |
Keywords
Sandvik S20S-CTFPR-11, Sandvik Coromant boring bar, Sandvik internal turning bar, S20S CTFPR boring bar 20mm, TPMT 110308 boring bar, TPGT 110308 toolholder, CNC lathe boring bar 20mm shank, internal turning toolholder, indexable boring bar Australia, Sandvik Coromant toolholder NOS, CNC lathe internal profiling bar, toolroom boring bar steel shank
