Tool holders built for your machine, your tool and your cut

A tool holder is the link between machine and cutting edge, and it decides how much of the machine's capability actually reaches the workpiece. When the holder is wrong for the job, the cost appears somewhere else: in surface finish, in insert consumption, in changeover time, or in an operation nobody wants to run on the night shift.

Chamundi Machine Tool Accessories has manufactured tool holders and machine tool accessories in Bengaluru as an ancillary to HMT Ltd. That heritage matters here because holders for turret lathes and vertical lathes are a system, not a part — and knowing the system is what makes a replacement fit the first time.

Holders are manufactured for turning, boring, drilling, milling and face-machining across vertical turret lathes, CNC lathes and machining centres.

• VTL tool holders for heavy vertical turning and facing
• ER collet holders and collets for milling and drilling
• BCA, BSA and BSB boring holders for square-shank and micro-boring tools
• FMB, FMC, SMS and SCA holders for face and surface machining
• MTA and MTB Morse taper holders for drilling, reaming and boring
• SLA and SLB holders, reduction and extension sleeves and pull studs

Every holder is defined by the machine side, the tool side, and the clamping between them. We confirm the turret slot, spindle taper or adaptor standard on your machine; the shank or collet series of the tool you intend to run; and the clamping and drive features required to hold it where the programme expects it.

Getting these three right on paper is why a CMTA holder does not arrive needing shims, rework or an apology.

Where a standard holder in CMTA's range suits the job, that is the fastest and most economical answer and we will say so. Where the application needs different reach, an angle, a combined operation or a compact body to clear a fixture, we design a special. Where the original is imported, discontinued or worn past use, we reverse engineer it from your sample — and fix the weakness that caused the failure, if the failure history points to one.

Holder bodies are machined from alloy steels chosen for the clamping and cutting loads, heat treated for core strength and surface hardness, and finish ground on the locating and clamping features that govern runout and repeatability. Heat treatment is coordinated through approved partners; machining, grinding and inspection follow CMTA's documented sequence with critical dimensions measured before dispatch.

• Rigidity under the actual cutting loads of the operation
• Runout and repeatability at the tool location
• Reach and clearance to the feature, fixture, chuck and tailstock
• Tool-change speed and how the holder handles on the shop floor
• Stability at the spindle speeds you intend to run

CMTA holders are in service on machines in automotive and auto-component plants, at machine tool builders, in heavy engineering shops, in general engineering job shops and in public-sector manufacturing units — on heavy facing and turning on VTLs, deep boring, multi-tool turret setups, and drilling and milling on machining centres.