Tight Tolerance Machining

Sanluo Precision is a leading manufacturer and supplier of tight tolerance machining in China, focusing on strict tolerance control technology and providing customers with high-precision services. We provide professional customized high precision machining services for the high-end manufacturing industry and support the customization of complex and difficult parts. We can produce precision parts with IT1-IT7 tolerance, fully meeting the strict requirements of various industries for tight tolerance machining.

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Product Description

Tolerance Control Capability

Sanluo Precision's tight tolerance machining implements strict tolerance control: Dimensional tolerance (diameter IT0 grade ±0.0002mm-IT1 grade ±0.001mm, length tolerance ±0.002-0.015mm); fit tolerance (shaft h2/h3 grade, hole H2/H3 grade, tolerance zone ±0.002-0.008mm); geometric tolerance (roundness 0.0005-0.005mm, flatness 0.0005-0.015mm, perpendicularity 0.001-0.02mm, concentricity 0.002-0.015mm, runout 0.002-0.03mm, position tolerance 0.002-0.05mm); surface roughness Ra0.05-1.6μm.

Workstation Accuracy

dimensional accuracy	L（X）	W（Y）	H（Z）	SW	GD
unit:±/mm	0.001	0.0005	0.0001	0.002	0.001
Geometric accuracy	flatness	parallelism	perpendicularity	symmetry	Position tolerance
unit:±/mm	0.0003	0.001	0.001	0.002	0.002
production capacity	1~999999 pcs	1~999999 pcs	1~999999 pcs	1~999999 pcs	1~999999 pcs
production cycle	3-20 days	3-20 days	3-20 days	3-20 days	3-20 days

Tolerance Machining Methods

Sanluo Precision's processing plant adopts a variety of machining technologies for tight tolerance machining: precision turning (diameter φ0.05-500mm, tolerance IT6 grade ±0.003-0.006mm, roundness 0.003mm), precision milling (flat tolerance ±0.002mm, hole position tolerance ±0.015mm), precision grinding (cylindrical grinding/internal grinding/surface grinding, tolerance IT5 grade ±0.001mm, roundness 0.001mm), precision boring (aperture φ10-500mm, tolerance IT5 grade ±0.002-0.01mm), precision drilling (diameter φ0.1-50mm, position tolerance ±0.02mm), jig boring (hole position accuracy ±0.002mm, for precision molds/fixtures).

Tolerance Inspection Assurance

As a professional manufacturer of tight tolerance machining, Sanluo Precision implements strict inspection assurance: dimensional inspection (CMM measuring accuracy 0.002mm for measuring dimensional tolerance/hole distance tolerance; laser instrument/ultra-precision micrometer/micrometer/vernier caliper/plug gauge/ring gauge/thread gauge for detecting diameter/length tolerance); Application cases: precision molds (cavity dimensional tolerance ±0.01mm, stamping die gap tolerance ±0.005mm), precision fixtures (locating pin hole H7 grade ±0.005mm, positioning accuracy ±0.01mm), measuring instruments (micrometer anvil flatness 0.003mm, plug gauge tolerance ±0.002mm), precision transmission (gear tooth profile IT6 grade, bearing inner and outer rings IT5 grade ±0.002mm), hydraulic and pneumatic (cylinder bore H7 grade ±0.006mm, spool fit tolerance ±0.003mm). We have directly or indirectly provided customized high precision machining services to Bosch, ZF, NSK and other enterprises, with an annual output of 200,000 pieces and a qualification rate of 99.8%.

Equipment Technical Parameters

Parameter Category	Parameter Details
Equipment Model	JDSGT400 Linear Motor Driven 3-axis High-Speed Machining Center
Core Positioning	For submicron-level ultra-high precision machining
Drive System	All three axes adopt dual linear motor drive
Key Accuracy	Repeat positioning accuracy up to 0.8 microns; hole position accuracy less than 1 micron within 100 mm range.
Core Technology	Integrates direct drive, temperature control, self-developed JD60 CNC system precision machining features and high-precision servo drive system
Core Advantage	Committed to achieving the excellent effect of "surface is the functional surface"
Typical Application	tight tolerance machining of precision optical molds, semiconductor parts, high-precision structural parts and other products with strict requirements on dimensions and surface quality

Parameter Category	Parameter Details
Equipment Model	Micro5 Micron-level High-precision 5-axis Machining Center
Core Positioning	High dynamic performance and high-precision machining of miniature, high value-added parts
Key Accuracy	Repeat positioning accuracy 0.0005mm, positioning accuracy < 0.002mm
Spindle System	Maximum spindle speed 60,000 rpm
Structural Features	Compact structure with total weight 550kg; equipped with three-layer tool magazine with capacity of 60 tools; processing area pallet system can hold 6 zero-point fixtures
Energy Saving and Environmental Protection	Extremely low energy consumption (<500W), equipped with oil mist collector
CNC System	German Beckhoff system
Stroke (X/Y/Z)	78 / 56 / 50 mm
Typical Application	tight tolerance machining of miniature engineering components, small precious metal parts, etc.