Product Overview
The W40705 Brake Caliper Piston Press (disc brake pad spreader / caliper rewind tool) is a professional brake service tool designed to push caliper pistons back into their bores when fitting new brake pads.
Built from high-grade forged alloy steel and heat-treated for rigidity, the frame resists flexing and the forcing screw stays straight under the high loads required to retract a seized piston. With a 0-65 mm compression range, it covers the front and rear calipers of most passenger cars, SUVs and light commercial vehicles. The screw features a 1/2″ DR square drive (21 mm), so it can be turned by the supplied T-bar handle or driven directly with a 1/2″ ratchet, extension bar, electric or air wrench for faster, smoother operation.
The wide, flat pressure plate distributes force evenly across the piston face, preventing cocking, scoring of the piston or damage to the dust boot — making it an essential tool for every brake pad replacement job.
Key Features
- Forged High-Grade Alloy Steel — One-piece forged frame, high rigidity, will not bend in long-term use
- 0-65 mm Wide Compression Range — Suits front and rear calipers on most cars, SUVs and pickups
- 1/2″ DR Square Drive (21 mm) — Works with ratchets, impact and electric wrenches for faster service
- T-Bar Handle Operation — Even, controllable torque in manual mode
- Wide Flat Pressure Plate — Distributes load evenly, protects piston surface and dust boot
- Trapezoidal Thread Screw — Smooth, self-locking and stable during retraction
- Anti-Corrosion Finish — Plated / black-oxide treated for oily, humid workshop conditions
- Individually Boxed — 1 pc per box, 24 pcs per carton, ideal for retail distribution
Specifications
| Item | Detail |
|---|---|
| Item No. | W40705 |
| Opening / Compression Range | 0-65 mm |
| Drive | 1/2″ DR square hole (21 mm) |
| Material | High-grade alloy steel, forged |
| Main Use | Retracting caliper pistons when fitting new brake pads |
| Inner Packing | 1 pc / box |
| Carton Qty | 24 pcs |
| Net Weight | 0.88 kg / pc |
| Gross Weight | 21 kg / carton |
Applications
- Dealerships and general repair shops — brake system service
- Front and rear brake pad replacement
- Brake caliper overhaul and piston reset
- Dust boot and seal kit replacement
- Tire shops and fast-fit service chains
- Large-displacement motorcycle and kart disc brake service
- DIY car owners’ brake maintenance tool kits
Why Choose Us
- 20+ Years of Automotive Tool Manufacturing — Specialists in brake and suspension service tools with in-house forging, machining and heat-treatment lines.
- Genuine High-Grade Alloy Steel — Load-bearing parts are forged and heat-treated; mill certificates and SGS reports available on request.
- One-Piece Forged Construction — Not cast, not welded — no porosity or hidden cracks, greater safety margin.
- Wide Versatility, Lower Inventory — 0-65 mm range plus universal 1/2″ drive covers a wide vehicle range with one tool.
- Direct Factory Export Pricing — No middleman markup; highly competitive for wholesale and distribution.
- Complete OEM / ODM Service — Custom logo laser engraving, paint colors, blister hang cards, color boxes, blow-molded cases and barcodes.
- Strict Quality Control — ISO 9001 system with 100% visual inspection, thread go/no-go gauging, load sampling and salt-spray testing.
- Stock Availability & Fast Lead Time — 7-15 days for stock orders, 30-45 days for customized orders.
- Global Export Network — Supplying 60+ countries across Europe, North America, the Middle East, South America and Southeast Asia.
- Full After-Sales Support — 12-month warranty with free replacement or refund for genuine quality defects.
FAQ
Q1: What is your MOQ?
A: 1 carton (24 pcs) for stock items; 500 pcs for custom-logo orders.
Q2: What does 0-65 mm mean, and which vehicles does it fit?
A: 0-65 mm is the maximum opening (working range) of the tool. It suits the front and rear calipers of most passenger cars, SUVs and pickups. For unusual calipers, send us the caliper thickness and piston diameter and we will confirm compatibility.
Q3: Can it be used on rear calipers with an Electronic Parking Brake (EPB)?
A: Usually not directly. Most EPB rear calipers use screw-in (rotating) pistons that must be turned while being pushed, requiring a dedicated brake caliper rewind tool (available in our range). The EPB must also be set to service mode with a diagnostic scanner first.
Q4: What does 1/2″ DR square hole mean?
A: The top of the forcing screw has a 1/2-inch (21 mm) square drive socket, so you can use a 1/2″ ratchet, extension bar, air or electric wrench — or the supplied T-bar handle for manual operation.
Q5: Can I use an air impact wrench?
A: It accepts 1/2″ drive tools, but we recommend a low-impact, speed-controlled electric wrench applied slowly and evenly. High-torque impact guns can cock the piston or damage the screw threads.
Q6: Why must the brake fluid reservoir cap be opened first?
A: Retracting the piston pushes fluid back into the reservoir. If the system is sealed, the pressure spike can damage brake lines, seals or the ABS module, or cause fluid to spray from the reservoir.
Q7: Is the material really alloy steel? Can it be verified?
A: Yes — high-grade alloy structural steel, forged and heat-treated. Material certificates or third-party (SGS/BV) testing can be arranged.
Q8: Can you add our brand logo?
A: Yes. Laser engraving, steel stamping, silk-screen printing and custom paint colors are available, along with blister hang cards, color boxes, manuals and barcodes for retail display.
Q9: What is your lead time?
A: 7-15 days for stock orders; approximately 30-45 days for OEM orders depending on quantity and packaging.
Q10: What payment terms do you accept?
A: T/T (30% deposit + 70% balance), L/C at sight, Trade Assurance, Western Union, and PayPal for small sample orders.
Q11: Can you send a sample first?
A: Yes. Sample charges are refundable against a bulk order; freight is at the buyer’s cost.
Q12: How is it packed? Can packaging be changed?
A: Standard packing is 1 pc per box, 24 pcs per export carton. Blister hang cards, color boxes or blow-molded cases are available on request.
Q13: How should it be maintained?
A: Wipe off brake fluid and dust after use (brake fluid attacks coatings, so clean promptly), grease the screw threads and store in a dry place. Before each use, check the screw for bending, the threads for stripping and the pressure plate for deformation.
