BSW-SPL31 Alternate Curling Machine – Precision Bicep Builder
Target each bicep independently to correct imbalances and achieve peak muscle development. Perfect for bodybuilders and athletes.
Model: BSW-SPL31
Size (LxWxH): 1215 x 1800 x 1060 mm
Net Weight: 200 kg
Primary Muscles Trained: Biceps Brachii, Brachialis, Forearm Flexors
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SPL31
MND Fitness
950691
Product Overview
【Independent Arm Movement】:Allows focused training on each arm to correct strength and size imbalances
【Adjustable Seat & Arm Pad】:Customizable fit for users of all sizes to ensure optimal curl path
【Pre-angled Grip Handles】:Promotes natural wrist alignment and reduces joint stress
【Smooth Cam Resistance】:Provides consistent tension throughout the entire curling motion
MND employs CNC machining for all critical pivot points, guaranteeing millimeter-perfect alignment and buttery-smooth movement in every Alternate Curling Machine.
Product Description
The MND SPL31 Alternate Curling Machine is engineered for precise, controlled biceps training with a focus on symmetry and muscle balance. Its independent arm movement system allows each arm to work separately, helping correct strength imbalances while enhancing overall arm development. Built with commercial-grade biomechanics, the machine delivers a natural curling path through its adjustable seating and arm support system, ensuring users of all sizes achieve optimal positioning.
Equipped with a pre-angled grip design, the SPL31 promotes natural wrist alignment to minimize joint stress during high-intensity workouts. The smooth cam resistance system maintains consistent tension throughout the entire movement, maximizing muscle engagement from start to finish. With CNC-machined pivot components ensuring millimeter-level precision, the machine guarantees ultra-smooth operation, long-term durability, and a premium training experience suitable for high-end commercial facilities.
Product Specifications
| Product name | ALTERNATE CURLING MACHINE |
|---|---|
| Model Number | MND-SPL31 |
| Assembled size | mm |
| Weight | KG |
| Weight stack | KG |
| Feature | 1) Round Steel Tube Wrapped By Rubber Handle, Good grasp feeling on muscle training 2) Excellent surface painting finish 3) With CE and ISO9001 Certifications 4) Top quality steel tube Q235 5) The weight can be increased or decreased according to user’s own situation, the magnetic pull pin has good safety protection effect. 6) Original brand with unique design 7) Smooth welding 8) Thickness:3mm before painting 9) Clear and concise muscle Instruction picture help the user to know how to use the machine |
| Function | Strenght exercise |
| Range of application | commercial gym use, fitness center use, home use or universal |
| Color | Black, Gray, White, yellow, or customized |
| Payment term | T/T, L/C at sight; 30% as deposit, and balance before shippment. |
| Delivery time | Usually 7-30 days after order confirmed and deposit received |
| Loading capacity | 20GP: 25 40HQ: 45pcs also depends on your total order list, we will check total order packing volume to offer advice. |
Key Features & Highlights

Independent Arm Movement: Trains each arm separately to correct muscle imbalances and improve symmetry
Adjustable Seat & Arm Pad: Multi-position adjustment for personalized fit and ideal curling biomechanics
Pre-angled Grip Handles: Ensures natural wrist alignment and reduces joint pressure
Smooth Cam Resistance System: Delivers consistent resistance throughout the full range of motion
CNC Precision Engineering: All pivot points are CNC-machined for ultra-smooth, accurate movement
Commercial-Grade Build Quality: Designed for durability in high-traffic gym environments
Frequently Asked Questions (FAQ)
Q1: What is your minimum order quantity? Can I start with a single unit?
A1:MOQ is 1 unit on all standard products. For orders under USD 5,000, payment is 100 percent in advance. For one 40HQ container or more, volume pricing discounts apply. You can test one piece first, then scale — we move at your pace. Request a quotation for your order size.
Q2: Do you offer OEM customization? Can I use my own logo and choose colors?
A2:Yes. We offer 40-plus frame color options with 10 standard colors free of charge. OEM logo labels (aluminum, crystal, or standard) include free tooling for orders of one 40HQ or more; smaller orders pay a one-time USD 150 mold fee. Custom packaging and free 2D/3D gym layout design are included. You approve the design render before production begins.
Q3: How long does production and delivery take?
A3:Standard lead times: 25 days for a 20ft container, 35 days for 40ft, 40 days for two 40HQ, and 45 days for three 40HQ. SC and SG series ship within 30 days of receiving the 30 percent deposit. Three parallel factories run year-round, so seasonal peaks do not delay orders. Urgent timelines can be discussed with our production team.
Q4: How do you control product quality? What testing and inspections do you perform?
A4:QC covers 100 percent incoming material inspection, in-process checks at every stage, and finished goods inspection before packing. We use German laser cutting and CNC machinery with a real-time visualized coating system. Every order includes 2 percent free spare parts. All products pass SGS LVD and EMC testing plus RoHS substance compliance verification.
Q5: What certifications do your products hold? Are they valid for my market?
A5:We hold 5 CE/GPSD certificates by UDEM (EU Notified Body 2292), covering treadmills, strength equipment, bikes, multi-functional trainers, and steppers — valid through 2027-2029. We also hold ISO 9001, ISO 14001, and ISO 45001 certifications by JingXin (IAF and CNAS accredited), valid through May 2028, plus SGS reports and RoHS/GPSR Declarations of Conformity for all product categories.
Q6: What are your payment terms and trade conditions?
A6:Standard terms: 30 percent T/T deposit, 70 percent balance before shipment. Orders under USD 5,000 require 100 percent advance payment. We quote FOB Tianjin Xingang by default; CIF terms are available upon request. Our priority bank is JPMorgan Chase Hong Kong (SWIFT: CHASHKHHXXX). PI validity is 21 days from the issue date.
Q7: What warranty and after-sales support do you provide?
A7:Strength equipment frames carry a lifetime warranty. Cardio machine motors are covered for 5 years. Other parts are warranted for 1 to 1.6 years depending on the product category. We respond within 24 hours and provide technical solutions within 72 hours. Spare parts remain available long-term for all models. Repeat buyers can bundle replacement parts into their next shipment.
Q8: Can I order a sample before committing to a bulk order?
A8:Yes. Since our MOQ is 1 unit, you can purchase a single unit as a sample at the standard unit price plus freight. The sample cost can be credited toward your first bulk order. Standard lead times apply to sample orders. This lets you evaluate build quality, finish, and packaging firsthand. Request a quotation for your preferred model.
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