Belleville Disc Spring for Spindle Drawbar

Stacked disc springs for stable tool clamping force

Belleville disc springs are the heart of the power drawbar in CNC machining and PCB drilling spindles. Stacked on the drawbar, they pull the tool holder into the spindle taper and supply a stable clamping force, while the unclamping cylinder compresses the stack at every tool change. Our spindle disc springs are made from high-grade spring steel, hardened, shot-peened and preset for high fatigue resistance, and supplied in custom sizes to your spindle drawing.

Stable clamping force over millions of tool-change cycles
Shot-peened and preset for high fatigue resistance and low relaxation
Tight OD / ID and thickness tolerances for smooth guiding on the drawbar
Custom sizes to your spindle drawing, supplied as matched stacks

Material: Spring steel 50CrV4 / 51CrV4, C75S, 65Mn; stainless steel on request
Standard: DIN 2093 / EN 16983, or OEM spindle drawing
Thickness: 0.2 – 10 mm

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IATF 16949
Custom to drawing
Factory direct

Belleville disc springs are the heart of the power drawbar in CNC machining and PCB drilling spindles. Stacked on the drawbar, they pull the tool holder into the spindle taper and supply a stable clamping force, while the unclamping cylinder compresses the stack at every tool change. Our spindle disc springs are made from high-grade spring steel, hardened, shot-peened and preset for high fatigue resistance, and supplied in custom sizes to your spindle drawing.

Built for Millions of Tool Changes

A drawbar spring stack is loaded and unloaded at every tool change, so fatigue life and load consistency matter far more than in static applications. We control the material, heat treatment and shot peening of every batch, and can grade springs by load so that each stack delivers the specified clamping force and stroke. Send us your spindle model or drawing, and we will match the inner and outer diameter, thickness, free height and stacking arrangement.

Why Choose Changbiao

As a factory-direct manufacturer with 20+ years of experience, we control the whole process — die design, stamping, heat treatment, surface finishing partners, inspection and packing — under an IATF 16949:2016 system. Custom sizes, materials and finishes are welcome; send us your drawing or sample for a quotation within 24 hours.

Material	Spring steel 50CrV4 / 51CrV4, C75S, 65Mn; stainless steel on request
Standard	DIN 2093 / EN 16983, or OEM spindle drawing
Thickness	0.2 – 10 mm
Sizes	Custom OD / ID / free height to match your drawbar and spindle bore
Hardness	42 – 52 HRC per DIN 2093
Surface Finish	Black oxide + oil (standard), phosphate + oil
Heat Treatment	Hardening and tempering on in-house line; shot peening and presetting
Inspection	Load–deflection test, hardness test, dimensional and flatness inspection
Certification	IATF 16949:2016, ISO 9001
Packing	Oiled, stacked in sequence on tubes, VCI bags, cartons on pallets

* Custom specifications available on request. Please send your drawing for an exact quotation.

Typical applications: CNC machining center spindles, PCB drilling & routing spindles, motorized spindles, tool clamping units

Inquiry

Interested in Belleville Disc Spring for Spindle Drawbar?

Tell us the size, material, finish and quantity — or upload your drawing. Our engineers will reply within 24 hours.

AddressNo. 86 Nanhu Avenue, Chengdong Town,
Hai'an City, Nantong, Jiangsu Province, China
Phone+86 176 5125 5759
WhatsApp+86 176 5125 5759
Email[email protected]
Working HoursMon – Sat, 8:00 – 17:30 (GMT+8)