Model		HT-6		HT-7			HT-8
Max. Digging depth (mm)		1850		2150			2640
Max. Digging radius (mm)		2800		3360			3930
Max. Digging height (mm)		2500		3400			3510
Loading height (mm)		1400		1760			2000
Max. Digging depth (2ft) Flat bottom (mm)		1600		2000			2500
Digging length(mm)		1610		1410			1450
Knighthead expanding width		1800		1830			1820
Swing Arc (°)		140		160			140
Bucket rofation (°)		160		160			160
Size (m3)Standard attached		0.036		0.045			0.054
Cap. (mm)Standard attached		300		400			450
Overall dimension		2300×1860×890		2360×1960×1270			2500×1960×1400
Weight(kg)		470		540			600
Valve standard press		16Mpa		16Mpa			16Mpa
Valve over loading protect press		7±1 MPa		7±1 MPa			7±1 MPa
Valve input flux area		12~28 L/mm		12~28 L/mm			12~28 L/mm
Connect height (mm)		410		460			460
Connect width (mm)		399		H′=530			H′=530
Up connect pinhole Dia.		Φ22		Φ22			Φ22
Down connect pinhole Dia.		Φ19		Φ19			Φ19
Bucket standard	Cap. (mm)		250		300	400		450	500	550
	Size (m3)		0.030		0.036	0.045		0.054	0.060	0.066