High Precision Universal Cylindrical Grinding Machine Universal External Grinder (MC1420B)

• Type: External Grinding Machine
• Processing Object: External and Internal Surface Grinding of Cylindri
• Abrasives: Grinding Wheel
• Controlling Mode: Artificial
• Automatic Grade: Automatic
• Cylindrical Grinder Type: Universal Cylindrical Grinder
• Model NO.: MC1420B
• Precision: High Precision
• Certification: GS, CE, RoHS, ISO 9001
• Condition: New
• Transport Package: Plywood Package
• Specification: Body made by HT300
• Trademark: J&W or OEM
• Origin: China Mainland
• HS Code: 8464209000
• Production Capacity: 700

Product Description

 Features of Structure and Performance

The hydraulic driving system adopts screw pump, so the machine can run smoothly with low noise.

The wheel head uses sleeve-type hydrodynamic bearing, gaining the features of high rotation precision and rigidity.

The feeding guideway uses plastic-coated guideway, improving the stability and vibration resistance in low-speed running.

The machine has the following features: high machining accuracy, rational overall layout, attractive appearance, centralized and visualized operating handles, and simple and safe operation.


Working Accuracy

No.	Inspection content	Sketch of test-piece and machining condition		Inspection Item	Unit	MC1420B
						×500	×750	×1000
M1	Grinding accuracy of test-piece between centers		L=350 d=35	Roundness	mm	0.0015		--
			L=750 d=75			--		0.0025
			L=350 d=35	Consistency of the diameter in longitudinal section	mm	0.005		--
			L=750 d=75			--		0.008
			-	Roughness	μm	Ra≤0.32
M2	Grinding accuracy of short test-piece fixed on the chuck		L=30 d=60	Roundness	mm	0.0025
			-	Roughness	μm	Ra≤0.32
M3	The accuracy of test piece internal grinding on chuck		L=50 d=30	Roundness	mm	0.0025
				Consistency of the diameter in longitudinal section	mm	0.005
			-	Roughness	μm	Ra≤0.63

Specifications

Item		Unit	MC1420B
			500	750	1000
Basic Parameters
Center height		mm	125
Distance between centers		mm	520	765	1080
Max. swiveling diameter		mm	Φ240
External grinding range		mm	Φ5-Φ200
Internal grinding range		mm	Φ13-Φ80
Max. internal grinding length		mm	125
Max. weight between centers		kg	50
Max. loading on chuck		kg	30
Worktable
Max. swing angle	Counter-clockwise	°	9	8	7
	Clockwise	°	9	8	3
Range of hydraulic moving speed		m/min	0.1-3
Travel of worktable per revolution		mm	≈10
Wheel head
Max. swing angle	Counter-clockwise	°	3
	Clockwise	°	3
Overtravel movement		mm	≈150
Manual feed travel		mm	70
Rapid hydraulic travel		mm	35
Transverse feeding	Travel per revolution	mm	1
	Micro feeding amount	mm	0.002
Internal grinding tools
Rotation speed of spindle		r/min	9245,12250,14848
Grinding wheel
External grinding	Max. diameter of wheel	mm	400
	Min. diameter of wheel	mm	280
	Width of wheel	mm	32-50
	Inner diameter of wheel	mm	203
	Max. linear speed	m/s	35
Internal grinding	(×) Max. size of wheel (OD×W)	mm	50×32
Headstock
Rotation speed of spindle		r/min	63, 125, 250, 500
()Max. swing angle (Counter-clockwise)		°	90
Spindle taper		Morse	No.4
Tailstock
Retraction of sleeve		mm	25
Taper of center		Morse	No.4
Hydraulic system
Flow of pump		L/min	14
System working pressure		MPa	0.8-1
Capacity of oil tank		L	≈140	≈170	≈200
Coolant system
Flow of oil pump		L/min	22
Capacity of coolant tank		L	130
Motors
External grinding motor	Power	kW	4
	Rotation speed	r/min	1500
Internal grinding motor	Power	kW	0.55
	Rotation speed	r/min	3000
Headstock motor	Power	kW	0.75
	Rotation speed	r/min	1000
Oil pump motor	Power	kW	1.1
	Rotation speed	r/min	1500
Coolant motor	Power	kW	0.125
	Rotation speed	r/min	3000
Others
Net weight		kg	2020	2420	3000
Gross weight		kg	2730	3130	3530
Overall dimension of the machine	Grinding length 500mm	mm	1800×1415×1420
	Grinding length 750mm		2290×1415×1420
	Grinding length 1000mm		2800×1415×1420
Packing dimension	Grinding length 500mm	mm	2690×2000×2050
	Grinding length 750mm		2810×2000×2050
	Grinding length 1000mm		3950×2150×2280