KORLOY SCLCR Boring Bar S08K-SCLCR-06 S10H-SCLCR-0306 Screw-on Internal Turning Tool Holder for CCMT Insert CNC Lathe

Overview

The KORLOY SCLCR/L series is a range of solid steel shank indexable boring bars for internal (ID) turning on CNC lathes and turning centres. Each bar holds a positive 80 degree rhombic insert with a 7 degree clearance angle in a screw-on clamp seat, cutting at a 95 degree approach angle. That combination keeps cutting forces low and chip evacuation clean, which is what a slender boring bar needs most.

Two models are offered in this range: S08K-SCLCR-06 with an 8 mm shank for bores from 10 mm, and S10H-SCLCR-0306 with a 10 mm shank for bores from just 6 mm.

• Solid steel shank - high rigidity for internal boring, with good resistance to the vibration that builds up as bar overhang increases.
• Screw-on clamp - a single screw and one wrench for insert indexing. Fast, repeatable and easy to replace on the shop floor.
• 95 degree approach angle - lets one bar handle internal boring and internal facing without changing tools.
• Positive insert, 7 degree clearance - low cutting forces, the right choice for small-diameter bars working in restricted bore space.
• Wide insert compatibility - takes CCMT, CCGT, CCGW, CCET and CCHT inserts of the matching size.
• Compact mini design - S10H-SCLCR-0306 reaches down to a 6 mm minimum bore diameter, and the reach-to-shank ratio is generous for such a small bar.
• Right and left hand - right-hand shown; left-hand equivalents are available (S08K-SCLCL-06, S10H-SCLCL-0306).

Take S10H-SCLCR-0306 as an example:

• S - steel shank (carbide shank equivalents use the prefix E)
• 10 - shank diameter, 10 mm
• H - shank length code; H = 100 mm, K = 125 mm (other letters run F = 80, G = 90, J = 110, M = 150)
• SCLCR - ISO holder code: S = screw-on clamp, C = 80 degree rhombic positive insert, C = 7 degree clearance angle, R = right hand
• 0306 - insert size code. Within this mini series the last two digits match the minimum bore diameter: 0305 = 5 mm, 0306 = 6 mm, 0407 = 7 mm, 0408 = 8 mm.

So S10H-SCLCR-0306 reads as: steel shank, 10 mm diameter, 100 mm long, screw-on clamp for a 7 degree clearance 80 degree rhombic insert, right hand, minimum bore 6 mm.

All insert styles listed above share the same 80 degree rhombic shape and 7 degree clearance angle. They differ in tolerance class and hole/edge form - CCMT and CCGT are the ones most commonly stocked, with CCGT (peripherally ground) preferred where surface finish matters.

• Internal boring, internal facing and internal profiling
• Small-diameter bores where a standard boring bar will not fit
• CNC lathes and turning centres
• Finishing and light roughing passes in internal work
• Bores from 6 mm (S10H-SCLCR-0306) or 10 mm (S08K-SCLCR-06) upward

• Clamp a minimum of one third of the bar length in the tool holder for best rigidity.
• Check the minimum bore diameter before ordering - the two models are far apart on this: 10 mm vs 6 mm.
• Note the counter-intuitive point: the 10 mm shank bar bores a smaller hole (6 mm) than the 8 mm shank bar (10 mm), because it uses the smaller 03-size insert. Choose by bore size first, then by bar rigidity.
• For deep bores, step up to the longest shank that still fits the bore - here that is the S08K at 125 mm overall.

Specify model, hand (R or L) and insert grade. Inserts are sold separately [[confirm: state whether inserts / wrench / spare screw are included]].