HALF-NOTCHED HIGH PRECISION CENTER

1. High rigidity & excellent vibration resistance (Core Selling Point)Integrated structure without bearings, no bearing clearance. Stable under heavy cutting and high load, less deformation & vibration. Superior to live centers for heavy stock removal and heavy-duty support.

2. High centering accuracyPrecision ground 60° taper, minimal runout. Ideal for grinding operations, delivers excellent roundness and concentricity for precision shafts, gauges and mold shafts.

3. Simple structure & low failure rate, maintenance-freeNo wearing parts like bearings or seals. Resistant to iron chips and dust, durable even in harsh workshop conditions, no regular lubrication required.

4. Cost-effectiveLower purchase price compared with live centers, low stocking cost, standard consumable for machining workshops.

5. Carbide tip version for superior wear resistanceTungsten carbide tipped head with high hardness. Long service life with proper lubrication, resistant to wear, annealing and tip chipping.

6. Wide compatibility & complete specificationsFull range of Morse taper shank MT1~MT6, compatible with lathes and cylindrical grinders. Semi-cut centers, extended centers available to avoid tool interference near workpiece end face.

7. Stable positioning for inspection & jigsSuitable for workpiece inspection and fixture centering, reliable static positioning for testing and center hole locating

FAQ

Q1: What is a fixed center (dead center)?

A: Fixed center, also known as dead center, adopts an integrated Morse taper shank structure. It has no bearing and the tip does not rotate. It is installed in the lathe tailstock sleeve. The workpiece rotates around the center tip to get support, widely used in low-speed high-precision turning.

Q2: What is the difference between fixed center and live center?

A: Fixed center: Non-rotating body with extremely high coaxiality and positioning accuracy. However, sliding friction occurs between workpiece and tip. It tends to overheat at high speed, suitable for low-speed finishing. Live center: Built-in bearings, the tip rotates together with workpiece, less friction and better heat resistance for higher speed. But bearing clearance makes its ultimate precision slightly lower than dead center.

Q3: What are common materials for fixed centers?

A: 1. Carbon / alloy tool steel: fully quenched, low cost for general applications. 2. Carbide tipped fixed center: tip inlaid with cemented carbide, excellent wear and heat resistance, ideal for precision finishing.

Q4: What is the typical accuracy of fixed centers?

A: Precision grade radial runout ≤0.002~0.003mm; standard grade about 0.005mm. Accuracy depends on the grinding quality of Morse taper shank and 60° tip taper. The tip must be protected from impact.

Q5: Can a fixed center still be used after tip collision?

A: Not recommended. The 60° taper is the positioning reference. Dents or chipping from impact will increase radial runout, causing poor roundness and dimensional error. It needs regrinding or replacement.

Q6: What processing scenarios suit fixed centers?

A: Ideal for low-speed finishing of shafts, cylindrical grinding, high-precision slender shaft turning. Suitable for jobs requiring strict coaxiality and roundness at low RPM. Not recommended for high-speed mass turning.

Q9: Key points for installation?

A: 1. Clean chips and oil from tailstock taper bore and Morse shank. 2. Insert the center and ensure full contact of taper surfaces. 3. Deburr workpiece center hole and apply lubricant. 4. Control tailstock thrust. Excessive pressure causes heat and workpiece bending; insufficient pressure leads to workpiece shifting.