Pianotech

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton

List,

I am rebuilding a 6'1" Weber from 1919.

String ht is 208 mm

Hammer center pin is 155 mm

This dictates a hammer bore of 53mm.

I estimate original bore at 48 mm.

I have heard that bores over about 50 mm will

contribute to poor repetition.

Measurements are accurate.

So my question to rebuilders is whether to honor stg ht – center pin ht.
at 53 mm. Or reduce this and allow for some over centering.

Old hammers had no rake ( or reverse rake )

Action ratio, hammer wt and action geometry are attended to.

Thank you,

Fenton