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High precision parallel block shim PB153-1/PB153-2

High Precision Parallel Block Shim PB153-1 / PB153-2

1. Tech Parameters

Material: Hardened alloy steel, HRC 55–62
Precision: Parallelism ≤0.005mm, flatness ≤0.003mm
Sets: PB153-1 (125mm long, 48pcs); PB153-2 (150mm long, 48pcs)
Pack: Wooden storage case

2. Main Uses

CNC mill, grinder, drill machine workpiece supporting
Level & lift parts in machine vise for parallel machining
Precision height reference for workshop inspection & layout
Mold, auto, hardware precision processing fixture aid

3. Features

Sold in matched pairs for even support
High flatness & wear resistance
Mix sizes to get any needed height
Portable wooden box for storage

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High precision parallel block shim PB153-1/PB153-2

FAQ:

Q1: What is a parallel block?

A parallel block is a high-precision rectangular gauge tool widely used in machine shops. Made of high-hardness steel, it features flat, parallel and vertical surfaces. It is mainly used for leveling, height supporting, workpiece shimming and positioning during machining and inspection.

Q2: What are precision parallel blocks used for?

Parallel blocks are essential auxiliary tools for CNC lathes, milling machines, grinders and inspection tables. They support and elevate workpieces, ensure horizontal leveling, correct workpiece parallelism, and assist accurate clamping and dimension measurement for precise metalworking.

Q3: What materials are your parallel blocks made of?

Our parallel blocks adopt high-quality carbon steel or alloy steel raw materials. After integral quenching and tempering heat treatment, they reach high hardness, strong compression resistance and anti-deformation performance. All surfaces are precision ground for ultra-flat finish and stable long-term accuracy.

Q4: What are your core product advantages?

Key strengths include high precision flatness with strict parallelism tolerance; high hardness & wear resistance for heavy-load machining; right-angle vertical accuracy for reliable positioning; anti-rust & durable finish; and matched paired sets for consistent shimming effect.

Q5: What sizes and types of parallel blocks do you supply?

We provide standard parallel block sets and single blocks in full specifications, including inch and metric sizes. Available in ordinary precision and high-precision grades, with solid type and slotted type options. Custom dimensions and tolerance grades are also supported for special machining needs.

Q6: What is the precision tolerance of your parallel blocks?

Standard grade parallel blocks feature flatness and parallelism tolerance within 0.01mm. High-precision grade can reach tolerance within 0.005mm. All products are strictly inspected to ensure zero deformation and consistent accuracy for precision milling, grinding and inspection work.

Q7: What is the hardness of your steel parallel blocks?

After professional heat treatment, the hardness reaches HRC 55-62. Ultra-high hardness effectively prevents surface abrasion, compression deformation and scratching during long-term clamping and heavy cutting operations.

Q8: Are parallel blocks used in pairs?

Yes. Parallel blocks are mostly used in matched pairs to ensure consistent height and parallelism on both sides, keeping the workpiece horizontal and stable. Our paired blocks are strictly caliberated in groups to guarantee no height error.

Q9: What machines are parallel blocks compatible with?

They are universally compatible with CNC milling machines, lathes, surface grinders, drilling machines and precision inspection platforms. Suitable for mold processing, mechanical parts machining, workshop inspection and tool calibration scenarios.

Q10: Can parallel blocks be used for heavy-duty machining?

Absolutely. Our integral steel forging structure provides strong bearing capacity. High hardness and anti-deformation performance enable stable support for heavy workpieces, suitable for heavy cutting and high-pressure clamping processing.

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