Screw jacks makishinko jb, jbh and jtb series (ball screw)

Technical Information

JB Series standard screw jacks (ball screw)

A high performance ball screw has been adopted that offers high-efficiency, low noise operation.

Features

This series uses a high-performance ball screw.
The nut and worm wheel have been integrated for a more compact design.
The Worm Speed Reducer is lubricated with an oil bath. This gives it ample durability even during high-speed operation.
An ideal bearing structure offers high performance.
A wide variety of standard jacks is available from 5 kN to 1250 kN.

Structure

[JB005 & JB010]

Screw shaft end
High precision, large screw shaft
Ideal bearing structure
Integrated ball nut and worm wheel
High precision worm wheel
Screw shaft guide
High efficiency reduction
Grease lubrication
Light weight housing
Large input shaft

[JB025 to JB1250]
*Only significant differences with the JB005 to JB010 models are explained.

Ideal bearing structure
Oil bath lubrication
Tough housing
End cap

JBH series hi-lead screw jacks (ball screw)

Hi-lead specifications A high speed jack with a larger screw lead

Features

High speed operation Each model is capable of high speed operation with a maximum operating speed of 5.9 to 8.4 m/min.
When operating at the same speed as the JB standard series, noise is reduced because the input shaft speed is decreased.
Standard models are available from 25 kN to 200 kN.

JBH Series basic specifications

Model			005	010	025	050	075	100	150	200
Nominal capacity (kN)			5	10	25	50	75	100	150	200
Screw shaft diameter (mm)			16	20	25	36	40	45	50	63
Screw shaft root diameter (mm)			13.6	17.3	21	31	34	38	42	55
Screw pitch (mm)			16	20	25	36	32	32	32	32
Reduction ratio	H		6	6	7.67	7.67	7.67	7.67	7.67	7.67
Reduction ratio	Ｌ				23	23	23	23	23	23
Traveling distance per one input shaft rotation	H		2.67	3.33	3.26	4.69	4.17	4.17	4.17	4.17
Traveling distance per one input shaft rotation	L (mm/rev)				1.09	1.57	1.39	1.39	1.39	1.39
Efficiency (%)	H	(30rpm)	58	59	57	57	56	59	58	58
	H	(1800rpm)	71	72	71	72	72	73	74	74
	L	(30rpm)			37	36	35	39	38	38
	L	(1800rpm)			58	58	59	62	63	63
Max input speed (rpm)			1800	1800	1800	1800	1800	1800	1800	1800
Standard stroke (mm)			Stroke of 50 to 500 (50 mm intervals), 500 to 1000 (100 mm intervals)
Screw torque (N･m)			13.2	33	103	297	399	534	805	1086
Input no load torque (N･m)			0.15	0.2	0.5	0.8	1.2	1.8	2.5	2.5
Input starting torque	H (N･m)		1.9	4.8	25.9	75.3	101.5	128.1	194.0	257.8
Input starting torque	L (N･m)				14.7	43.3	58.9	71.3	108.9	144.3
Holding torque	H (N･m)		1.1	2.9	5.9	15.8	20.2	32.9	47.6	63.5
Holding torque	L (N･m)				2.7	9.0	13.0	11.2	18.6	24.9
Reversing load (kN)			5	10	25	50	75	100	150	200
Load at rest (kN)			8	15	25	50	80	140	170	250
Weight (kg)			2.5	3.5	20	25	35	55	65	80

Note:

1. The weight is an estimated value for a stroke of 300 mm.
2. Screw torque, input starting torque and holding torque are the values at nominal capacity.

JTB Series traveling nut screw jacks (ball screw)

Features

The operation of the traveling nut minimizes the necessary space for installation in the axial direction.

Structure

[*The structure describes models of 025 to 1250.]

Integrated ball nut and traveling nut
High precision, large screw shaft
Ideal bearing structure
High precision worm wheel
Large input shaft
High efficiency reduction
Tough housing
Oil bath lubrication

SCREW JACKS MAKISHINKO JB, JBH AND JTB SERIES (BALL SCREW)

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