Frequently Asked Questions

Stavalk is headquartered in Qingdao, China, with our manufacturing campus in the Jimo district. The 8,000 m² facility houses casting, CNC machining, heat treatment, assembly, and quality control under one roof. Sales, engineering support, and export logistics are managed from Qingdao; all production is domestic in China.

Stavalk manufactures professional bench vises (bench vices). We offer five product series: light-duty 2″–5″ jaw vises for home workshops and hobby use, medium-duty 6″–8″ vises for professional garages and workshops, heavy-duty 8″–10″ vises for industrial workholding, pipe vises with 1/8″–2″ capacity for plumbing and pipe fabrication, and specialty models including quick-release, swivel-base, and anvil-back configurations.

Our factory operates with 200+ skilled workers and produces 80,000+ bench vises per year. We currently export to 50+ countries across North America, Europe, the Middle East, Southeast Asia, and Latin America. Production runs are planned in seasonal batches to maintain consistent delivery schedules for all regions.

Vise bodies are cast from HT200 or HT250 gray cast iron, providing high rigidity and vibration damping. Jaws are made from 45# forged steel for structural strength. Jaw inserts use GCr15 or Cr12MoV hardened tool steel, heat-treated to Rockwell C 58–62 for wear resistance under repeated clamping cycles.

Production begins with sand casting using both green sand and resin sand molds. Castings are then CNC-machined to final dimensions. Heat treatment follows to achieve the required hardness profile. Surface coating is applied by spray paint, powder coating, or Parkerizing depending on the model. Assembly is performed using a combination of manual precision work and hydraulic pressing, with every unit passing through a 7-stage inspection process before packaging.

Each vise is tested for clamping force at rated capacity, jaw hardness via Rockwell C 58–62 measurement, swivel torque for models with rotating bases, and cycle durability exceeding 10,000 clamp-and-release operations. Corrosion resistance is verified through salt-spray testing lasting 48+ hours. Defective units are rejected at every inspection stage, not just at final QC.

CE marking applies to models destined for EU markets under EN ISO 12100 and the Machinery Directive 2006/42/EC (scope confirmed per project). Our factory maintains ISO 9001:2015 quality management and ISO 14001:2015 environmental management certifications. REACH, RoHS and other market-specific compliance documentation is available where applicable. We welcome third-party audits from SGS, TÜV, Bureau Veritas, and Intertek. Copies of certificates can be provided to verified buyers upon request.

Yes. OEM means we build vises to your specifications and drawings on one of our existing series — you own the design and intellectual property. ODM means our engineering team designs a new vise from scratch, from concept sketch through 3D model, prototype sample, and validation testing before volume production. Private label means we apply your brand mark, paint color, and packaging to a validated production model with no structural changes. We sign an NDA before any file exchange, and tooling costs are amortized across the first production run.

OEM: you supply the design or engineering drawing and we manufacture to your spec. ODM: you provide a market brief or performance requirement and we develop the complete vise design, handling engineering, prototyping, and validation. Private label: you select an existing validated model and customize the brand mark, surface finish, and packaging with no design changes. Most projects fall between these categories, and we quote the configuration that matches how much design ownership you need.

Standard MOQ for light- and medium-duty vises is 50–200 pcs depending on model and configuration. Heavy-duty and specialty vises carry a lower MOQ of 20–50 pcs due to higher per-unit value. Sample orders are accepted at 1–2 pcs for evaluation, and pilot runs of 20–50 pcs are available for new-product qualification before committing to full volume.

Prototype samples ship within 7–14 days once specifications are confirmed. Bulk production runs 25–35 days from confirmed PO and deposit receipt. If new patterns or tooling are required, add approximately 15–20 days for pattern development and first-article approval. Rush timelines may be possible for repeat orders with existing tooling and confirmed material stock.

FOB Qingdao is the default shipping term; CIF and DDP are available on request. A standard 20ft container holds approximately 1,200–1,800 light- and medium-duty 4″–6″ vises depending on carton configuration and packing density. Payment terms are deposit to confirm production, with the balance due before shipment. Specific percentages are agreed per order and written into the contract.

Individual vises are wrapped and placed in custom-printed corrugated cartons with your brand artwork, model number, and carton markings per destination market requirements. Heavy and industrial models ship in reinforced plywood cases. Each carton includes an instruction sheet and hardware packing list. A packaging sample is approved before volume production begins, so what you approve is exactly what ships.

Warranty terms are written into each purchase contract. Standard coverage is 12 months from shipment against defects in materials and workmanship, covering cracked castings, jaw misalignment, and mechanism failure under normal use. Damage from misuse, overload, or unauthorized modification is excluded. The warranty period and claim procedure are stated on the PO, not discovered after the fact.

Report the issue within the agreed claims window (typically 7–15 days of arrival) with photos or video evidence. We assess the claim against pre-shipment inspection records and QC photos kept for your batch, then offer rework, replacement, or credit accordingly. Having documented inspection records for every unit makes this process fast and fair for both sides.

Sample fees cover the cost of producing 1–2 evaluation units and are typically credited in full against the first production order once it reaches the agreed volume. Tooling and pattern costs are itemized at quotation stage and amortized across the first production run rather than charged as a separate upfront fee. All fee structures are confirmed in writing before any commitment.

Yes. We welcome both on-site visits and third-party audits from buyers and independent inspection agencies. Our 8,000 m² campus is audit-ready with documented processes covering casting, machining, heat treatment, coating, assembly, and final inspection. A quality documentation pack including certificate of conformance, material certificates, dimensional inspection reports, and QC photos is available for every production batch. Virtual factory tours can be arranged for initial qualification.

Jaw width determines clamping capacity and workpiece size range. 2″–5″ jaws suit light-duty tasks like hobby woodworking, small metal brackets, and DIY projects. 6″–8″ jaws handle general professional work including automotive parts, medium fabrication, and repair shop use. 8″–10″ jaws are for heavy industrial clamping such as large steel assemblies, welding fixtures, and heavy machining setups. Match the jaw size to your largest expected workpiece, plus one size class of margin for versatility.

A bench vise has flat parallel jaws and is designed for clamping flat or rectangular workpieces on a workbench for sawing, filing, drilling, or assembly. A pipe vise has V-shaped or curved jaws specifically shaped to grip round stock such as pipes, tubes, and conduits without crushing or marring them. Bench vises are general-purpose; pipe vises are specialized. Most fabrication shops carry both types.

Stavalk offers both manual and power-assisted vise options. Manual vises use a leadscrew or quick-release mechanism operated by hand. Pneumatic or hydraulic vises use compressed air or fluid pressure for faster clamping in high-throughput production environments. Both use the same cast-iron body and hardened jaw inserts — the difference is in the actuation mechanism. Power-assisted models are recommended when operators perform hundreds of clamp cycles per shift.

We support multi-SKU programs covering all five series under a single factory agreement. Start with 2–4 anchor models matched to your target markets, then expand into specialty configurations like swivel-base, quick-release, or anvil-back models. Add spare-part SKUs including replacement jaw inserts, mounting bolts, base plates, and handle assemblies. Shared packaging systems and consistent branding across the line reduce per-SKU inventory costs and keep your catalog cohesive.

Replacement jaw inserts (hardened steel, matched to each model), mounting bolts and hardware kits, swivel-base components, handle assemblies, and base plates are all available as spares. Parts can be ordered alongside production or as small reorders. Keeping spare jaw inserts in stock is especially recommended since they are the primary wear component subject to replacement during the vise service life.

Provide your target market and intended use, preferred vise series or jaw size, quantity and target price, branding and packaging requirements, and your desired timeline. If you have drawings or reference samples, include them. The more specific the brief, the faster and more accurate the quotation — our inquiry form captures exactly this information to avoid unnecessary back-and-forth.

Yes. We support complete distribution setups including multi-SKU catalog development, consistent packaging and branding across the full range, spare-parts stocking, and phased volume scaling as your market grows. Our export team handles FOB, CIF, and DDP logistics with documented shipment plans aligned to your inventory cycles. New distributors typically start with a pilot order of 20–50 pcs across 2–3 models to validate market fit before committing to container quantities.

A swivel base lets the jaw rotate 360° around the bench post, letting you present the work at any angle for filing, drilling, or assembly without repositioning the workpiece. The base is locked in place with a locking handle and is tested for swivel torque so it holds position under load. Choose a swivel base for bench work that benefits from adjustable orientation; a fixed base is stronger and lower-cost if the vise sits at one position permanently.

Standard finishes are powder coating and spray paint in a range of colors, both applied over a prepared surface for rust resistance. Parkerizing is available on request for industrial models where a matte, corrosion-resistant finish is preferred and where painting is not desired on machined faces. Finish choice does not affect clamping performance, and the selected finish is applied consistently across your full order so color and texture match from box to box.