Last Holder for Footwear Upper Stretching Machine

Product Specifications

Technical details and manufacturing context for Last Holder

Definition

The Last Holder is a critical component of the Industrial Footwear Upper Stretching Machine. Its primary function is to firmly grip and immobilize the shoe last (the foot-shaped form) at a precise orientation, providing a stable foundation against which the shoe upper material is stretched and formed. This ensures consistent shaping and proper alignment of the footwear during manufacturing. The holder typically uses mechanical clamps, pneumatic actuators, or hydraulic systems to apply controlled pressure to the heel and/or toe areas of the shoe last. It is mounted on the machine's frame or a movable carriage and is often adjustable to accommodate different last sizes and shapes. Once engaged, it locks the last in place, preventing movement during the high-tension stretching operation. Key specifications include a clamping force of 5–20 kN, operating pressure of 0.6–1.0 MPa, cylinder stroke of 20–50 mm, clamping repeatability of ±0.05 mm, operating temperature range of -10 to 60 °C, ingress protection rating of IP54–IP65 (per IEC 60529), supply voltage of 24 V DC ±10%, power consumption of 10–30 W, and weight of 5–15 kg. The unit is typically constructed with an aluminum alloy body and hardened steel clamping jaws. These values are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The Last Holder is designed for use in leather and related product manufacturing, specifically in the footwear production line. It is a component that integrates with the stretching machine's control system, often requiring solenoid valves and sensors. Proper selection depends on the last size, material, and required stretching force. Maintenance signals include reduced clamping force, air leaks, or inconsistent positioning. Failure boundaries include operation outside the specified temperature or pressure ranges, which may affect seals and performance. Always consult the manufacturer for model-specific data and compliance.

Working Principle

The Last Holder operates by applying controlled clamping force to the shoe last, typically at the heel and toe areas. This force is generated by pneumatic or hydraulic actuators, which are controlled by solenoid valves. The holder is mounted on the machine frame or a movable carriage, allowing adjustment for different last sizes. Once the last is positioned, the clamping mechanism engages, locking it securely. The high clamping force (5–20 kN) prevents any movement during the stretching process, ensuring accurate shaping. The system's repeatability (±0.05 mm) ensures consistent positioning across cycles. The operating pressure (0.6–1.0 MPa) is regulated to provide the necessary force, and the cylinder stroke (20–50 mm) accommodates various last dimensions. The holder's design includes seals and sensors to monitor position and pressure, with ingress protection (IP54–IP65) to withstand industrial environments.

Common Materials

Carbon Steel, Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Clamping Force	5–20 kN	Required to hold last securely during stretching
Operating Pressure	0.6–1.0 MPa	Below 0.6 MPa clamping force insufficient
Cylinder Stroke	20–50 mm	Determines range of last sizes accommodated
Clamping Repeatability	±0.05 mm	Ensures consistent positioning
Operating Temperature	-10–60 °C	Outside range may affect seals and performance
Ingress Protection	IP54–IP65	Protects against dust and water splashesIEC 60529
Supply Voltage	24 ±10% V DC	For solenoid valves and sensors
Power Consumption	10–30 W	Includes solenoid and sensor load
Material	Aluminum alloy, hardened steel	Aluminum body, steel clamping jaws
Weight	5–15 kg	Depends on size and configuration

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Clamping Jaw Part
The contact surface that directly grips the shoe last, often lined with a non-marring material.

Material: Steel with rubber/polyurethane lining
Actuation Mechanism
The system (pneumatic cylinder, hydraulic piston, or screw) that moves the clamping jaws.

Material: Steel, Aluminum
Mounting Bracket Part
The base that attaches the holder to the stretching machine frame.

Material: Cast Iron or Steel
Solenoid Valve
Switches air or oil to the actuator to engage and release the clamp.
Size Adjustment Mechanism
Repositions the holder for different last sizes.

Manufacturers of Last Holder

Manufacturer profiles associated with Last Holder.

Sourcing Last Holder from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 16 September 2026

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the clamping force range of the Last Holder?

The clamping force range is 5–20 kN, as listed in the directory. This is a reference range; the actual force required depends on the specific last size and stretching application. Always verify with the manufacturer for your model.

What operating pressure is required for the Last Holder?

The operating pressure is 0.6–1.0 MPa. Below 0.6 MPa, clamping force may be insufficient. Confirm the exact pressure requirement with the supplier for your system.

What is the ingress protection rating of the Last Holder?

The ingress protection rating is IP54–IP65 per IEC 60529, protecting against dust and water splashes. This is suitable for typical industrial environments, but verify the specific rating for your unit.

Can the Last Holder accommodate different last sizes?

Yes, the cylinder stroke of 20–50 mm determines the range of last sizes accommodated. The holder is adjustable, but the exact range depends on the model. Consult the manufacturer for compatibility with your lasts.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Last Holder

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Max clamping force: 500 N
other spec:	Last size range: EU 35-48, Max vibration tolerance: 5 g RMS
temperature:	Ambient to 80°C (176°F)

Last Holder

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards