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Open Front Press With Rigid Overload Protector And Fixed Bed
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Open Front Press With Rigid Overload Protector And Fixed Bed

Open Front Press With Rigid Overload Protector And Fixed Bed

This JF21 series crankshaft press machine eatures crush-type mechanical fuse with auto-break under overpressure to protect the main unit, reducing failure rates by 40% compared to uninsured single-point models. High-rigidity welded frame with six-sided guide rails ensures ±0.03mm positioning accuracy, extending die life by 20%. Maintenance costs are only 1/3 of hydraulic models, supporting manual die adjustment and automation module expansion for traditional stamping applications requiring low cost and high stability.

Information

Open Front Press with Rigid Overload Protector——A Reliable Alternative to Traditional Stamping Processes

The crankshaft press machine, specifically our advanced c frame mechanical press, features a crush-type mechanical fuse with an auto-break function under overpressure to protect the main unit. This rigid overload protected press design reduces failure rates by 40% compared to uninsured single-point models. As a high-performance mechanical fixed bed stamping press, its high-rigidity welded frame with six-sided guide rails ensures ±0.03mm positioning accuracy, extending die life by 20%. Our press with shear plate overload protection ensures that maintenance costs remain only 1/3 of hydraulic models, supporting manual die adjustment and automation module expansion for traditional stamping applications requiring low cost and high stability.

I. Core Advantage: Perfect Balance Between Mechanical Rigidity and Cost-Effectiveness

1. Mechanical Rigidity Insurance Ensures Basic Overload Protection

The crush-type safety block design in this rigid overload protected press allows it to break automatically to release energy when pressure exceeds the limit. This press with shear plate overload protection cuts major failure risks and costs significantly less than hydraulic alternatives. For many factory owners, the crankshaft press machine remains the most dependable choice for long-term durability.

2. High Rigidity Body and Precision Guide System

The mechanical fixed bed stamping press features a welded steel structure that undergoes tempering and vibration aging; its rigidity is 30% higher than ordinary models. This c frame mechanical press utilizes a six-sided rectangular guide rail and eight-sided guide slider design. Such precision ensures that this rigid overload protected press reaches a repeat positioning accuracy of ±0.03 mm, extending mold life by 20% on the crankshaft press machine.

3. Low Maintenance Cost and Easy Operation

As a robust mechanical fixed bed stamping press, the simple and reliable structure requires no complicated hydraulic maintenance. Regular lubrication and safety block inspections are all that's needed for this c frame mechanical press. Manual mold adjustment and a foot switch come standard on this press with shear plate overload protection, making it intuitive and suitable for SMEs with focused automation requirements.

4. Diversified Configuration and High Adaptability

This mechanical fixed bed stamping press supports fixed stroke and fixed table designs with a throat depth of 210-420mm. The c frame mechanical press is adaptable to a variety of mold sizes. Optional modules for the crankshaft press machine, such as electric mold adjustment and automatic feeding, allow this rigid overload protected press to meet evolving production needs.

II. Application Areas: A Practical Choice for Traditional Manufacturing

This c frame mechanical press is widely applicable to:

Metal Processing: Basic processes such as sheet metal punching and angle steel forming using a mechanical fixed bed stamping press.
Hardware Manufacturing: Production of standard parts such as locks and brackets with the crankshaft press machine.
Auto Parts: Batch production of simple stamping parts via the press with shear plate overload protection.

III. Technical Parameter

Specification			JF21-16	JF21-25	JF21-45	JF21-63
Nominal Force		kN	160	250	450	630
Nominal Stroke		mm	2	3	4	4
Slide Stroke		mm	60	80	120	120
SPM	Fixed	min⁻¹	135	100	80	70
SPM	Variable (Option)	min⁻¹	120-150	80-120	40-90	35-80
MAX Die Height		mm	220	250	270	300
Die Height Adjustment		mm	30	50	60	80
Between Slide Center to Frame		mm	160	210	230	300
Bolster Area (FB x LR)		mm	310 x 700	400 x 700	440 x 810	580 x 900
Bolster Opening (up dia. x depth x low dia.)		mm	Φ170 x 20 xΦ150	Φ170 x 20 xΦ150	Φ180 x 30 xΦ160	Φ200 x 40 xΦ180
Bolster Thickness		mm	65	80	110	110
Bolster Opening (FB x LR)		mm	200 x 220	360 x 250	300 x 300	390 x 460
Slide Area (FB x LR)		mm	250 x 320	250 x 360	340 x 410	420 x 480
Shank Hole (Dia x Depth)		mm	Φ40 x 60	Φ40 x 60	Φ40 x 60	Φ50 x 80
Between Columns		mm	450	450	550	560
Main Motor Power		kW	3	3	5.5	5.5
Outline Dimension (FB x LR x H)		mm	1500 x 1040 x 2000	1300 x 1025 x 2150	1390 x 1125 x 2320	1580 x 1205 x 2580

Specification			JF21-80	JF21-110	JF21-125	JF21-160B	JF21-200B
Nominal Force		kN	800	1100	1250	1600	2000
Nominal Stroke		mm	5	6	6	6	6
Slide Stroke		mm	140	160	160	160	500
SPM	Fixed	min⁻¹	60	50	50	45	40
SPM	Variable (Option)	min⁻¹	50-70	30-60	30-60	25-50	25-50
MAX Die Height		mm	320	350	350	350	450
Die Height Adjustment		mm	80	80	80	110	110
Between Slide Center to Frame		mm	300	350	350	380	390
Bolster Area (FB x LR)		mm	580 x 1000	680 x 1150	680 x 1150	740 x 1300	760 x 1400
Bolster Opening (up dia. x depth x low dia.)		mm	Φ200 x 40 xΦ180	Φ260 x 50 xΦ220	Φ260 x 50 xΦ220	Φ300 x 50 xΦ260	Φ300 x 50 xΦ260
Bolster Thickness		mm	120	140	140	150	160
Bolster Opening (FB x LR)		mm	390 x 520	420 x 540	420 x 540	480 x 600	480 x 600
Slide Area (FB x LR)		mm	420 x 560	500 x 650	540 x 680	580 x 770	600 x 800
Shank Hole (Dia x Depth)		mm	Φ50 x 80	Φ60 x 80	Φ60 x 80	Φ65 x 90	Φ65 x 90
Between Columns		mm	640	760	760	850	870
Main Motor Power		kW	7.5	11	11	15	18.5
Outline Dimension (FB x LR x H)		mm	1640 x 1290 x 2800	1850 x 1450 x 3060	1850 x 1490 x 3060	2230 x 1630 x 3210	2230 x 1650 x 3520

IV. FAQ
Q1: Does the rigid insurance device need replacement?
A1: Yes. The safety block must be replaced after crushing, but costs are low (about 1/5 of hydraulic systems), ideal for budget-sensitive users.

Q2: Are rigid insurance models more durable than open single-point presses?
A2: Yes. Rigid insurance protects core components, reducing long-term wear from overload and extending equipment lifespan by 15%.

Q3: Can this equipment be upgraded for automated production lines?
A3: Yes. Optional automatic feeding axis and safety light curtain enable semi-automated production via PLC system.

Q4: What is the maintenance frequency?
A4: Routine maintenance involves lubricating guide rails and inspecting safety blocks, taking ~2 hours monthly with lower costs than similar models.