CNC Turning Tool Holders & Boring Bars
Indexable turning tool holders, boring bars, and threading holders from CNCHome-Beyond (Super Industrial Trading). 200+ SKUs across 15 categories, ISO 5608 standard, compatible with all major carbide insert brands, dispatched from Hangzhou in 2-3 days.
About Turning Tool Holders
A CNC turning tool holder is the steel body that clamps a carbide insert and mounts to a lathe turret or tool post. It is the foundation of any turning, boring, threading, or grooving operation. The holder does three things: (1) it locates the insert at a precise cutting geometry (lead angle, rake angle, clearance angle), (2) it transmits cutting forces from the insert back to the machine without deflection, and (3) it directs high-pressure coolant at the cutting edge for chip control and tool life.
Choosing the right holder matters as much as choosing the right insert. A wrong holder can cause chatter, poor surface finish, premature insert failure, and even tool breakage. CNCHome-Beyond stocks 200+ holders in 15 categories covering every common CNC turning application, from precision Swiss-type boring to heavy-duty engine lathe roughing.
Every holder on this page conforms to ISO 5608 standard insert seats, so they accept any insert that matches the geometry code. This means a holder bought from us works with Sandvik, Kennametal, Mitsubishi, Iscar, KORLOY, Kyocera, or our house brand BEYOND inserts. You can mix-and-match holders and inserts by brand to optimize for cost or performance.
Best-Selling Turning Tool Holders
8 bestsellers across all 6 clamping systems, hand-picked from our top sellers. Every holder is in stock and ships from our Hangzhou warehouse within 2-3 business days. Click any product for full specs, available shank sizes, and quantity pricing.
All 15 Categories of Turning Tool Holders
Browse by clamping system, insert type, and application. Each category has 12-20 SKUs in stock with full dimensional specs.
Screw-Clamp Tool Holders
Single-screw clamping for light-to-medium turning. Most economical. Best for finishing and small-batch production. Compatible with all CNMG, DNMG, TNMG, WNMG, VNMG, CCMT, TCMT inserts.
Multi-Lock Tool Holders
Pin-and-clamp top-and-bottom locking. Strong insert retention, higher feed rates. Industry-standard for medium-to-heavy roughing. Wide insert compatibility including CNMG 1204, WNMG 0804, TNMG 1604.
Double-Clamp (D-Type) Tool Holders
Dual-screw clamping for heavy-duty turning. Maximum rigidity for interrupted cuts, high feed rates, and tough materials like Inconel and titanium. Compatible with CNMG, DNMG, TNMG, WNMG, SNMG inserts.
Lever-Lock (P-Type) Tool Holders
Quick-change lever clamping for high-mix production. Change inserts in seconds without tools. Compatible with WNMG, CNMG, DNMG, TNMG, CCMT inserts. Best for CNC shops running 50+ part numbers per day.
External & Internal Threading Holders
Dedicated holders for ISO Metric, Trapezoidal (TR), ACME, API, and NPT thread profiles. Standard 16ER/16IR/22ER/22IR laydown geometry plus solid-type for high-pressure threading.
Solid Carbide Boring Bars
Tungsten-carbide boring bars for high-rigidity internal turning. Anti-vibration design for deep-hole boring. Shank diameters from 6mm to 32mm.
Multi-Functional Grooving & Parting Holders
Dedicated grooving and parting holders for face slots, OD grooves, ID grooves, and cutoff operations. Compatible with TGF32, GB43, and 7GR/6GR grooving insert geometries. Shank sizes 12x12mm to 25x25mm.
Clamping System Comparison: Which Holder Type Do You Need?
The four main clamping systems each have distinct advantages. The right choice depends on your insert grade, cutting conditions, and production volume.
| Clamping System | Insert Change Time | Best For | Insert Compatibility | Recommended Feed |
|---|---|---|---|---|
| Screw-Clamp (S-Type) | 30-60 sec (torx key) | Light-to-medium turning, finishing, small batch | CNMG, DNMG, TNMG, WNMG, VNMG, CCMT, TCMT | 0.05-0.30 mm/rev |
| Multi-Lock (M-Type) | 20-40 sec (hex key) | Medium-to-heavy roughing, general production | CNMG, DNMG, TNMG, WNMG, SNMG, KNUX | 0.15-0.50 mm/rev |
| Double-Clamp (D-Type) | 45-90 sec (2 screws) | Heavy interrupted cuts, Inconel, titanium, high-feed | CNMG, DNMG, TNMG, WNMG, SNMG (large sizes) | 0.30-1.00 mm/rev |
| Lever-Lock (P-Type) | 5-10 sec (no tools) | High-mix production, 50+ part numbers/day, Swiss lathes | CNMG, DNMG, TNMG, WNMG, CCMT | 0.10-0.40 mm/rev |
How to Choose a Turning Tool Holder
1. Match the Insert Geometry
Identify your insert shape (CNMG, WNMG, TNMG, etc.) and size (the 4-digit code, e.g. 1204 = 12mm IC, 4mm thick). The holder seat must match exactly. Use the Insert Holder Selector if unsure.
2. Choose External Holder or Boring Bar
External turning: square shank (12x12mm, 20x20mm, 25x25mm) mounted on the lathe turret. Internal boring: round shank boring bar (8mm to 50mm diameter) inserted into a boring head. Match the shank to your turret capacity.
3. Pick the Clamping System
General production: Multi-Lock (most versatile). Quick change: Lever-Lock (P-Type). Heavy interrupted: Double-Clamp (D-Type). Economical: Screw-Clamp (S-Type). See the comparison table above.
Frequently Asked Questions
What is a turning tool holder?
A turning tool holder (or turning tool bar) is the steel body that clamps a carbide insert and mounts to a CNC lathe turret or tool post. The holder provides the rigidity, coolant delivery, and chip evacuation needed to hold tight tolerances in OD turning, ID boring, threading, and grooving. The insert is the consumable cutting edge; the holder is reusable indefinitely. CNCHome-Beyond stocks over 200 holders in 15 categories covering screw-clamp, multi-lock, double-clamp, lever-lock, threading, solid carbide, and high-speed-steel designs.
How do I choose the right turning tool holder?
Three factors determine the right holder: (1) Insert geometry — match the holder seat to your insert shape (CNMG, WNMG, TNMG, etc.). (2) Operation type — external turning uses a square-shank holder mounted on the lathe turret, internal boring uses a round-shank boring bar with shank diameter smaller than the bore. (3) Clamping system — screw-clamp for general use, multi-lock for medium roughing, double-clamp for heavy interrupted cuts, lever-lock for quick-change high-mix production. If unsure, start with a multi-lock holder and CNMG 120408 insert, the most common combination.
What is the difference between external holders and boring bars?
External holders have a square or rectangular shank (typically 12x12mm, 16x16mm, 20x20mm, or 25x25mm) that mounts to the lathe turret. Boring bars have a round shank (typically 6mm to 50mm) that fits into a boring head on the turret and reaches into a pre-drilled hole to machine internal diameters. Boring bars are typically longer and more slender, which means they need anti-vibration features (tungsten carbide, damped bodies) for deep-hole work above 4xD depth.
Are these holders compatible with my existing inserts?
Yes. All our holders conform to ISO 5608 standard insert seats, so they accept any insert that matches the geometry code (CNMG, WNMG, TNMG, DNMG, VNMG, CCMT, TCMT, etc.). For example, a PCLNR2525M16 lever-lock holder accepts any brand of CNMG 1604 insert — Sandvik, Kennametal, Mitsubishi, Iscar, KORLOY, or our house brand BEYOND. This cross-brand compatibility is one of the key advantages of ISO-standard tooling.
What is the right shank size for my lathe?
Shank size is determined by your lathe turret capacity and the insert size you need. For CNC slant-bed lathes, 20x20mm or 25x25mm are most common for CNMG 1204 / 1604 inserts. For Swiss-type lathes and small precision lathes, 12x12mm or 16x16mm with CNMG 0903 / 0804 inserts. For heavy-duty engine lathes and large part turning, 25x25mm or 32x32mm with CNMG 1906 / 2507 inserts. Match the shank height to the turret slot width — too tight and the holder won't seat, too loose and you lose rigidity.
Do you offer custom tool holders?
Yes. We offer custom shank dimensions, custom insert seats for proprietary insert geometries, and private-label manufacturing for distributors. Typical custom shank tooling MOQ is 50 pieces with 4-6 week lead time from drawing confirmation. For OEM-brand-labeled holders (your logo on the body, your part number engraved), MOQ is 200 pieces. Send us your drawing and target price for a formal quote within 48 hours.
Order Turning Tool Holders or Request a Quote
Need a shank size or insert geometry not in our standard catalog? Send us a drawing or sample insert, and we will return a custom-tooling quote within 48 hours. Bulk pricing tiers: 2-9 pieces 6% off, 10+ pieces 12% off.