Direct Grip on TG150 Collets – Built for 0.003 mm TIR Runout This is a CNC machined TG150 collet chuck designed for heavy duty milling and drilling operations that demand absolute tool retention. It g
This is a CNC machined TG150 collet chuck designed for heavy duty milling and drilling operations that demand absolute tool retention. It grips TG150 series collets with a clamping range of 3–34 mm, delivering a guaranteed TIR (total indicated runout) of 0.003 mm at the nose, measured 4×D from the collet face. We machine the taper and thread in a single setup on a Mazak 5-axis, then grind the OD and face to a surface finish of Ra 0.4 µm. Lead time for standard sizes is 15–20 days, and we ship from Dongguan with a 12-hour firm quote response.
The TG150 system uses a 15° included angle taper, steeper than ER collets, which creates a stronger axial pull and radial clamping force. We cut the internal taper to a tolerance of ±0.005 mm using a CBN-grinded mandrel, then lap the mating surface to 90% contact with the collet. This prevents the collet from "bell-mouthing" under high torque, a common failure on cheaper chucks. You get repeatable gripping force of 1,800–2,200 N·m on a 32 mm shank, enough to hold carbide end mills through interrupted cuts in stainless steel or Inconel.
We start with 20CrMnTi alloy steel, carburized to a case depth of 0.8–1.2 mm, then hardened to HRC 58–62 on the taper and thread. The body is through-hardened to HRC 40–45 for toughness without brittleness. We nitride the nose cone to a surface hardness of HV 900–1000, which resists wear from repeated collet changes. Every chuck is stress-relieved twice: once before rough machining and once after grinding, to ensure dimensional stability over years of production. This is precision manufacturing, not just CNC turning – we treat each piece like a spindle component.
Heavy duty doesn't mean slow. We dynamically balance every TG150 chuck to G2.5 at 20,000 RPM as standard, with an optional G1.0 balance for high-speed machining centers. The balance is achieved by milling four correction slots on the flange, then re-checking on a Schenck balancer. We record the residual unbalance value (in g·mm) on the inspection report. If you run at 25,000 RPM or above, specify G1.0 and we pre-balance with the collet and pull stud installed – that eliminates the "phantom vibration" you get from unbalanced assemblies.
We check three critical dimensions on every chuck before it leaves our Dongguan factory: (1) taper angle using an air gauge with 0.002 mm resolution, (2) thread pitch diameter with a calibrated ring gauge, (3) TIR runout after mounting a test collet and a 10 mm test bar. We also perform a hardness test on the taper surface (Rockwell C) and a magnetic particle inspection for micro-cracks. You receive a signed inspection report with the actual measured values, not a generic certificate of conformance. If any dimension is out of spec, the part is scrapped – we don't rework tapers.
We machine the rear thread to match your spindle interface – common options are MAS BT (BT30, BT40, BT50), CAT (40, 50), and HSK (63A, 100A). The thread is cut to class 2B tolerance, and we supply matching pull studs (DIN 69872, MAS 403, or custom) with a tensile strength of 1,200 MPa. If you use a proprietary pull stud, send us a sample or drawing – we will reverse-engineer the thread and seat angle to within 0.01 mm. This is a common request for retrofit projects, and we handle it with no extra tooling cost.
Standard TG150 chucks (BT40, 60 mm gauge length) start at $185 per piece FOB Shenzhen. Custom length, special balance, or non-standard thread adds 10–15% and extends lead time to 25 days. MOQ is 1 piece – we have no MOQ for standard sizes, so you can order a single chuck for a prototype run. We stock raw forgings for the top 10 most common sizes, which cuts lead time to 10 days for those. Email us your drawing or spindle model, and we will send a firm quote within 12 hours, including freight to your port.
| Specification | Value / Range |
|---|---|
| Collet series | TG150 (DIN 6499 compatible) |
| Clamping range | 3 – 34 mm (collet bore) |
| Shank types | BT30 / BT40 / BT50 / CAT40 / CAT50 / HSK63A / HSK100A |
| Material | 20CrMnTi carburized steel, case depth 0.8–1.2 mm |
| Hardness (taper & thread) | HRC 58–62 |
| Hardness (body) | HRC 40–45 |
| TIR runout (at nose, 4×D) | 0.003 mm (standard), 0.0015 mm (precision grade) |
| Taper angle tolerance | ±0.005 mm (15° included angle) |
| Surface finish (OD & taper) | Ra 0.4 µm (ground) |
| Dynamic balance | G2.5 @ 20,000 RPM (G1.0 optional) |
| Gripping force | 1,800 – 2,200 N·m (on 32 mm shank) |
| Lead time (standard) | 15–20 days (10 days for stocked sizes) |
| MOQ | 1 piece (no MOQ for standard sizes) |
We have no MOQ for standard sizes – you can order 1 piece for testing, and custom sizes also start at 1 piece with a small setup fee.
Yes, we machine any standard shank (BT, CAT, HSK) and can reverse-engineer proprietary pull studs from a sample or drawing within ±0.01 mm accuracy.
We use a single-setup machining process on the taper and thread, then 100% air-gauge inspection – every chuck is measured, and any unit exceeding 0.003 mm TIR is scrapped, not reworked.
Standard chucks ship in 15–20 days, stocked sizes in 10 days, and we send a firm quote with freight within 12 hours of receiving your drawing or spindle specification.
We are a 20-year precision manufacturing factory in Dongguan, China, specializing in CNC machining, stamping, springs, and heat sinks – but our core DNA is tight tolerance work. This TG150 chuck is built on the same 5-axis line we use for aerospace components, so you get a tool holder that matches the accuracy of your machining center. If you are comparing us to Japanese or German brands, check the inspection report – our runout and hardness specs are identical, at 40–50% lower cost. We also back every chuck with a 30-day return policy if it does not fit your spindle taper.
Before you order, review our CNC cutting tool selection guide to match the collet chuck to your operation, and check CNC machining tolerances guide to understand what TIR values mean in practice. For cycle time improvements, our advanced toolpath article shows how tool holding stiffness affects feed rates – a rigid TG150 chuck lets you push parameters without chatter.
Stop guessing on tool holder quality. Send us your spindle model, collet sizes, and gauge length – we will respond with a firm price, lead time, and a 3D model for approval. Email your drawing to sc@bquq.com or message us on WhatsApp at +86 13713157787. We speak fluent English and Chinese, and our engineers will review your application to recommend the right balance grade and thread option. This is a heavy-duty tool holder that will not let you down – prove it with your toughest cut.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
