What's in the BLF-24 Kit (24 Pieces)

The BLF-24 ships with the items a workshop actually uses on a 3/16" copper-nickel or coated steel brake line, day after day:

• 1 flaring tool body with 5 interchangeable dies (3/16", 1/4", 5/16", 3/8", 1/2" — SAE 45° single + double flare)
• 1 tubing cutter for 1/8" to 1-1/8" OD tubing
• 1 double-edge deburring tool (inside + outside)
• 1 3/16" brake line bending lever (90° bend without crushing)
• 20 short-thread bleed screws / replacement nuts / washers (4 spare of each common size)

Total 24 pieces, packed in a blow-mold case (PE foam insert, weight ~3.2 kg per case, 6 cases per export carton).

Material & Tolerance Specifications

Wall-thickness drift on the flare is a leading cause of cracked brake line under pressure. The BLF-24 dies are machined and inspected to keep wall-thickness drift ≤ 0.02 mm — within the SAE J533 limit for brake pipe flares.

Standards the BLF-24 Is Built To

The kit supports flares that meet the requirements buyers and inspectors actually check:

• SAE J533 — Flares for tubing (45° single + double flare geometry, dimensions)
• SAE J1290 — Automotive hydraulic brake systems — test methods
• ISO 4038 — Hydraulic brake pipe connections — metric reference
• ASTM B88 — Seamless copper water tube (material reference for 3/16" cupro-nickel)
• REACH / RoHS — compliant for EU export (test report on request)

If your market is North America, we ship against SAE J533 + SAE J1290 by default. If your market is EU, ISO 4038 is the reference dimension; we can swap the 5/16" die for an ISO bubble-flare variant on orders of 300+ sets.

4 Failure Modes We Screen Before Shipment

From 8 years of exporting brake flaring tools, these are the defects our QC team flags most often. The BLF-24 is built to keep each one out of your shipment:

• Die concentricity drift > 0.05 mm → produces oval flares that won't seat. Our Cr12MoV dies are held to ≤ 0.05 mm TIR (Total Indicator Reading) on a V-block gauge before assembly.
• Wall-thickness drift on flare > 0.02 mm → crack source under 1,000 psi brake pressure. We section-test each lot to confirm drift is inside SAE J533 limits.
• Copper contamination on cutter wheel → transfers copper to steel tubing, causing corrosion. The BLF-24 cutter wheel is ground on a dedicated line; we do not share wheels between steel and copper production runs.
• Bending lever pinch on 3/16" tube → kinked brake line fails pressure test. The BLF-24 lever is matched to 22 mm bend radius for 3/16" — verified on a go/no-go gauge per lot.

How to Use the BLF-24 on a 3/16" Brake Line (6 Steps)

1. Cut the tubing square with the included cutter. A square cut is the #1 determinant of a good flare.
2. Deburr both inside and outside edges with the double-edge tool — burrs cause pressure leaks.
3. Insert the tubing into the flaring block until it protrudes the height of the die nipple.
4. Clamp the block, fit the correct die (3/16" for most brake lines), and tighten the yoke.
5. Rotate the handle clockwise until the cone forms a 45° flare (single) or two-stage fold (double).
6. Release the clamp, fit the brake line fitting, and torque to the vehicle maker's spec (typically 11–14 ft-lb for 3/16" inverted flare).

Step 1 is the most common mistake we see from new users: an angled cut makes the flare wall uneven, and the fitting leaks under pressure.

Care & Maintenance Schedule

• Wipe dies and cone dry after each use — moisture + chloride is the leading cause of surface pitting.
• Light machine oil on the cone threads every 50 cycles, or before storage.
• Replace the cutter wheel when the edge shows a 0.2 mm wear flat (a spare wheel ships in the case).
• Re-calibrate die concentricity once per year if the kit sees daily fleet use — torque specs must still hold.

BLF-24 — Buyer FAQ (B2B Wholesale & OEM)

1. What is the MOQ for stock BLF-24 kits?
100 sets for stock configuration (black wrinkle case, no custom mark). 300–500 sets for custom logo on the case. 1,000+ sets for fully private-label retail packaging.

2. What is the lead time?
30–45 days for stock configurations after deposit. 45–60 days for custom logo or retail box. Sample lead time 7–10 days by DHL.

3. Can I get a custom die set (e.g. ISO bubble flare or metric DIN)?
Yes. We can replace one or more of the 5 standard dies with an ISO 4038 bubble-flare die, a DIN 74234 die, or a JIS B 0203 PT die on orders of 300+ sets. Sample tooling lead time 30 days.

4. What replacement parts are available?
Cutter wheels (each), 5-die sets, bending levers, blow-mold cases, foam inserts, and yoke repair kits. All replacement parts can be ordered separately — minimum 50 pieces per line item.

5. What is the HS code and shipping mark?
HS code 8205.59 (hand tools, other). Default shipping mark is OEM-neutral. Custom shipping mark is free of charge on orders of 500+ sets.

6. Do you support OEM/ODM private label?
Yes — our standard OEM program covers case color, logo (silk-screen or laser-etched), retail box design, and barcode/QR. We can also tool a custom blow-mold case on orders of 3,000+ sets.

Order Information & Inquiry Options

The BLF-24 is in stock at our Ningbo factory. Choose whichever channel fits your buying process — we reply to all three within 12 hours, Monday to Saturday.

• WhatsApp / WeChat: +86 158 5791 1270 — fastest for Latin America, Africa, Middle East (Amy / Alisa / Akira on rotation)
• Email: amy@longrunhardware.com — for formal RFQ with target spec, quantity, destination port, and Incoterms (FOB Ningbo / CIF / DDP)
• RFQ form: Request a Quote online — for buyers who prefer a structured form (15 fields, takes ~3 minutes)

For OEM / private-label programs, please include your target cable length, die variant, color, logo file (AI / PDF / PNG), retail box design, quantity, and destination port. Our export team will confirm specification, sample plan, lead time, and FOB / CIF pricing.

Related buyer's guide: Brake Line Flaring Tool Kit: B2B Buyer's Guide for Auto Repair Workshops — kit selection, flare type comparison, channel-by-channel market map, and OEM/ODM procurement details.