ID Grinding

Sanluo Precision is a professional manufacturer and supplier of ID grinding in China, with 18 years of technical accumulation in the field of precision inner hole grinding, providing customers with high-quality internal grinding services. We offer professional customized cylindrical grinding services for precision machinery, semiconductor industry, hydraulic and pneumatic, aerospace and other industries, supporting the customization of complex and difficult parts. Complete precision grinding of inner holes with IT1-IT7 accuracy, fully meeting the strict requirements of high-end manufacturing for internal grinding.

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Product Description

Our ID grinding is a precision inner hole processing process. The high-speed rotating grinding wheel extends into the hole, the workpiece rotates or the grinding wheel feeds, grinding the inner hole surface to obtain high precision and high finish.

Processing range: inner hole diameter φ3—500mm, depth ≤1000mm, depth-diameter ratio ≥5:1, long hole, deep hole, blind hole, through hole can be processed. Processing accuracy: dimensional tolerance IT5-IT7 ±0.003—0.01mm, roundness 0.002—0.005mm, cylindricity 0.003—0.008mm, surface roughness Ra0.1-0.8μm.

Grinding types include: ordinary internal grinding (grinding wheel head diameter φ6—80mm, speed 15000-60000rpm, can grind general precision inner holes), centerless internal grinding (no centering required, high efficiency, large batch), planetary internal grinding (grinding wheel revolution plus rotation, large diameter inner holes).

Station Accuracy

Dimensional accuracy	OD	ID	T（C）	DP	DA
unit:±/mm	0.002	0.001	0.002	0.002	0.0001
Geometric accuracy	Roundness	Coaxiality	Straightness	Cylindricity	Circular runout
unit:±/mm	0.001	0.002	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

cylindrical grinding Equipment

The processing plant is equipped with imported precision internal grinders such as STUDER S31, JUNKER, TOYODA, grinding accuracy ±0.003mm, roundness 0.002mm, surface Ra0.2μm. Equipped with CBN, corundum, diamond grinding wheels, selected according to different materials. CNC system for automatic cycle, diamond roller dressing, pneumatic laser probe on-line inspection, CMM off-line full inspection to ensure processing quality.

Grinding Equipment Control

As a professional ID grinding manufacturer, Sanluo Precision has strict process control: divided into rough grinding and finish grinding stages, allowance 0.02—0.3mm; grinding wheel speed 15000-60000rpm, workpiece speed 50-300rpm, micro-feed 0.001—0.005mm/time; sufficient cooling and lubrication, temperature control 20-25℃; accurate workpiece positioning and firm clamping, grinding wheel dynamic balance G6.3 grade, spark-free finish grinding to improve accuracy; first article full inspection, process monitoring, timely adjustment and compensation. Wide range of applications: precision bearings, hydraulic and pneumatic, semiconductor industry, precision molds, aerospace and other industries. Inner hole diameter φ2—500mm, tolerance IT5-H8 grade, roundness 0.002—0.008mm, surface roughness Ra0.2-0.8μm. The company has provided customized cylindrical grinding services for NSK, THK, Bosch Rexroth, ZF, FAW, Weichai and other enterprises, with an annual grinding of 1.5 million inner hole parts, stable accuracy and reliable quality.

Technical Parameters

Parameter Category	Parameter Details
Equipment model	Bryant RU2
Core Positioning	Flexible and compact expert in internal/external grinding
CNC Axis	/
Bed and Measurement	Granite epoxy resin body ensures thermal stability, grating scale resolution 0.1µm
Drive System	Adopts linear motor and static pressure bar feed system
Configuration Flexibility	Multiple guide rails can be configured on X and Z axes, as well as multi-head frame, multi-grinding wheel head and dressing system
Core Advantages	Designed to ensure excellent rigidity and accuracy, each grinder can carry up to four spindles
Typical Applications	precision parts ID grinding for high-end medical, semiconductor industry, optical industry

Parameter Category	Parameter Details
Equipment model	MKF2110+B axis
Core Positioning	Multi-functional compound grinding (internal round hole, internal taper hole, internal and external spherical surface, etc)
CNC Axis	4-axis (X-axis workpiece transverse feed, Z1, Z2 grinding wheel longitudinal movement, B-axis horizontal indexing)
Grinding Range	Inner hole diameter 10-100mm, depth 120mm; outer diameter 15-150mm
Motion Accuracy	B-axis repeat positioning accuracy ±2 arc seconds; X/Z axis repeat positioning accuracy 2μm
Processing Accuracy	Inner hole/outer roundness 2μm, cylindricity 3μm, surface roughness Ra 0.4μm
CNC System	/
Core Function	Automatically complete grinding cycle, with automatic grinding wheel correction and compensation function
Typical Applications	precision parts ID grinding for high-end medical, semiconductor industry, optical industry

Parameter Category	Parameter Details
Equipment model	Studer S131
Core Positioning	High-precision internal circle, arc and spherical grinding
Drive Technology	High-precision linear drive device with linear motor and direct-drive fully automatic B-axis
Core Advantages	Suitable for grinding hard and complex workpieces and mold parts
Typical Applications	Complex internal holes, arcs, spheres and ID grinding