Pilot CON-70 Ink Converter Guide

Pilot CON-70 Ink Converter 80 mm CON-70N converter — _{Pilot CON-70 Ink Converter, an 80 mm high-capacity push-button converter currently sold as the Pilot CON-70N.}

Looking for a shorter converter? See the Pilot CON-40 Ink Converter guide or the Pilot CON-B Squeeze Ink Converter guide.

Not sure this is the right converter? Use the Pen Refill Finder to compare converter, cartridge, refill size, format, and compatibility.

Buy the Pilot CON-70 Ink Converter

Buy Pilot CON-70 / CON-70N Ink Converters:

The Pilot CON-70 is Pilot’s large-capacity converter design. The current version is officially called the CON-70N and uses a push-button filling mechanism with an official ink capacity of approximately 1.1 mL.

Quick Specs

Specification	Details
Common Name	Pilot CON-70 Ink Converter
Current Official Model	Pilot CON-70N
Other Common Names	Pilot CON-70 Converter, Pilot CON-70N Converter
Product Type	Fountain pen ink converter
Filling Type	Push-button converter
Length	80 mm
Maximum Diameter	Approx. 9 mm
Available Finishes	Black or silver
Official Ink Capacity	1.1 mL
Ink Source	Bottled fountain pen ink
Cartridge Alternative	Pilot Fountain Pen Ink Cartridge
Compatible Brands	Pilot, Namiki
Common Compatible Pens	Larger Pilot and Namiki cartridge/converter fountain pens with sufficient barrel clearance
Key Similar Converters	Pilot CON-40, Pilot CON-B
Proprietary or Standard	Proprietary Pilot/Namiki converter
Reusable?	Yes
Ink Compatibility	Use fountain pen-safe bottled ink only

Pilot CON-70 Ink Converter Overview

The Pilot CON-70 Ink Converter is a high-capacity reusable converter for compatible Pilot and Namiki cartridge/converter fountain pens.

The current version is officially designated CON-70N. The older CON-70 remains a very common search name and refers to the earlier version of the same general high-capacity Pilot converter family.

The CON-70N measures 80 mm long and holds approximately 1.1 mL of ink according to Pilot. That makes it significantly larger than the CON-40 and CON-B.

Its size is both its biggest strength and its primary limitation: it carries much more ink, but it only fits pens with enough internal barrel space.

Pilot CON-70 vs CON-70N

The CON-70N is the current version of Pilot’s high-capacity push-button converter.

The original CON-70 and current CON-70N use the same general concept: a large reservoir and push-button filling system. Pilot’s current catalog uses the CON-70N designation, while many retailers and users still refer to the converter simply as the CON-70.

For search and compatibility purposes, “Pilot CON-70 Converter” remains a useful umbrella term, but buyers purchasing a new converter today will commonly encounter the CON-70N.

Why Choose the Pilot CON-70 Ink Converter?

The main reason to choose the CON-70 is ink capacity.

Benefits include:

Official 1.1 mL ink capacity
Large transparent reservoir
Push-button filling mechanism
Fewer refills than smaller converters
Excellent option for frequent writers
Useful in larger Pilot and Namiki fountain pens
Access to bottled fountain pen ink

If your pen accepts it, the CON-70 provides substantially greater capacity than the smaller CON-40.

How the Push-Button Filling System Works

The CON-70 uses a push-button filling mechanism rather than a conventional screw piston.

With the nib submerged in bottled ink, pressing and releasing the button operates the internal filling system and draws ink into the reservoir.

Multiple presses may be used to improve the fill.

The advantage is a large reservoir without a long rotating piston shaft occupying as much internal ink space.

Pilot CON-70 vs CON-40 vs CON-B

Converter	Mechanism	Length	Approx. Capacity	Best Use
Pilot CON-B	Squeeze	58 mm	~0.6 mL	Simple compact filling
Pilot CON-40	Twist piston	60 mm	0.4 mL official capacity	Broad compatibility and compact fit
Pilot CON-70 / CON-70N	Push button	80 mm	1.1 mL	Maximum converter capacity in compatible larger pens

The CON-70 holds considerably more ink than the CON-40, but the additional 20 mm of length means barrel clearance becomes a major compatibility factor.

Pilot CON-70 Compatibility Notes

Pilot states that the CON-70N can be used in Pilot cartridge fountain pens, but also notes that some products cannot use it.

This is an important distinction. The converter uses Pilot’s normal proprietary connection, but its 80 mm length and approximately 9 mm maximum diameter prevent it from fitting many smaller Pilot pens.

Commonly compatible larger models include pens such as:

Pilot Custom 74
Pilot Explorer
Pilot Kakuno
Pilot Metal Falcon
Pilot Justus 95
Select larger Pilot Custom-series pens
Many compatible Namiki fountain pens

Always confirm model-specific compatibility before ordering.

Pilot CON-70 vs Pilot Ink Cartridge

Option	Reusable?	Ink Source	Approx. Capacity	Best For
Pilot CON-70 / CON-70N	Yes	Bottled fountain pen ink	1.1 mL	High-capacity reusable filling
Pilot Fountain Pen Ink Cartridge	No	Pre-filled ink	Model-dependent cartridge capacity	Convenience and quick replacement

The CON-70 is particularly useful for writers who use a lot of ink and want access to bottled ink colors.

How to Fill the Pilot CON-70 Ink Converter

Install the converter securely into the fountain pen section.
Dip the nib and feed fully into bottled fountain pen ink.
Press the converter’s push button while the nib remains submerged.
Release and allow the mechanism to draw ink into the reservoir.
Repeat the push-and-release action as needed to improve the fill.
Remove the nib from the bottle.
Wipe away excess ink.
Reassemble the pen.

Use only bottled fountain pen-safe ink.

Compatible Pens

The Pilot CON-70 is intended for larger Pilot and Namiki cartridge/converter fountain pens with sufficient internal space.

Common compatible examples may include:

Pilot Custom 74
Pilot Explorer
Pilot Kakuno
Pilot Metal Falcon
Pilot Justus 95
Select Pilot Custom-series fountain pens
Many larger Namiki fountain pens

Not all Pilot cartridge/converter pens have enough room for the CON-70.

Compatible Brands

The Pilot CON-70 / CON-70N is designed primarily for:

Pilot
Namiki

It uses Pilot’s proprietary connection and is not a standard international converter.

Alternative Cartridges and Converter Options

Common alternatives include:

Pilot CON-40 Ink Converter — shorter rotating-piston converter
Pilot CON-B Squeeze Ink Converter — compact squeeze converter
Pilot Fountain Pen Ink Cartridge — disposable cartridge option
Bottled fountain pen ink — used with the converter

If your pen does not have enough room for the CON-70, the CON-40 is usually the more practical converter to investigate.

Converter Family

The Pilot CON-70 belongs to Pilot’s proprietary fountain pen converter family.

It is the large, high-capacity push-button option. The current model is officially designated CON-70N.

Its companion converters are the smaller CON-40 rotating-piston converter and CON-B squeeze converter.

How to Identify the Pilot CON-70 Ink Converter

The Pilot CON-70 / CON-70N may be found with either black or silver-colored exterior components depending on the version or market. Both use the same basic high-capacity push-button converter design, so the finish color alone should not be used to determine compatibility.

Key identification points include:

80 mm overall length
Approx. 9 mm maximum diameter
Large clear reservoir
Push-button filling mechanism
1.1 mL official capacity
Proprietary Pilot connection
Significantly larger than the CON-40
Current version commonly marked or sold as CON-70N

The large reservoir and push-button end make the CON-70 easy to distinguish from Pilot’s smaller converters.

Frequently Asked Questions

What is the Pilot CON-70 Ink Converter?

The Pilot CON-70 is Pilot’s large-capacity push-button converter for compatible Pilot and Namiki cartridge/converter fountain pens.

Is the CON-70 still current?

Pilot’s current version is officially called the CON-70N. The older CON-70 name remains widely used as the common name for this converter family.

How long is the Pilot CON-70?

Pilot officially lists the current CON-70N at 80 mm long.

How much ink does the Pilot CON-70 hold?

Pilot officially lists the CON-70N at approximately 1.1 mL.

How does the CON-70 fill?

It uses a push-button filling mechanism. With the nib submerged in ink, pressing and releasing the button draws ink into the converter.

Is the Pilot CON-70 reusable?

Yes.

Does the Pilot CON-70 come in black and silver?

Yes. Pilot CON-70 / CON-70N converters can be found with black or silver-colored exterior components. The finish may vary by version or market, but compatibility should be determined by the converter model and your specific Pilot or Namiki fountain pen rather than color alone.

Does the CON-70 fit every Pilot fountain pen?

No. Its 80 mm length means it only fits Pilot and Namiki pens with enough internal barrel space.

Does the CON-70 fit the Pilot Custom 74?

Yes. The Custom 74 is one of the well-known Pilot models compatible with the CON-70 / CON-70N.

Does the CON-70 fit the Kakuno?

Many Kakuno models can accommodate the CON-70 because their barrels have enough internal space.

What is the difference between the CON-70 and CON-40?

The CON-70 is 80 mm long, uses a push-button mechanism, and holds 1.1 mL. The CON-40 is 60 mm long, uses a rotating piston, and has an official capacity of approximately 0.4 mL.

Is the Pilot CON-70 standard international?

No. It uses Pilot’s proprietary fountain pen connection.

What ink can I use with the Pilot CON-70?

Use bottled fountain pen-safe ink only.

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